Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
34results about How to "Adapt to actual engineering needs" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Calculating method and calculating application of forms of debris flow siltation behind silt arresters
InactiveCN103276687AReasonable determination of back silt thicknessReasonably determine the maximum back-silting lengthHydraulic engineering apparatusEffective lengthTopographic map
The invention discloses a calculating method and calculating application of forms of debris flow siltation behind silt arresters. The method includes: using methods such as site measuring, indoor geotechnical tests, and large-scale topographic map calculating to determine internal friction angles of debris flows and gully slopes of debris flow gullies; putting obtained parameters into a formula of the forms of the debris flow siltation behind the silt arresters, namely reasonably determining debris flow siltation thickness at different positions in a reservoir; and further determining maximum siltation length and siltation longitudinal slopes of the debris flows behind the silt arresters, and effective length of each silt arrester in the presence of limited silt burying points. Compared with the prior art, gully conditions and self-properties of the debris flows are considered comprehensively, an equation of forms of the debris flow siltation behind the silt arresters is obtained through theoretical derivation, engineering parameters such as the maximum siltation length, the siltation slopes and the permitted maximum arrester height can be determined reasonably, and scientific evidence can be provided for debris flow prevention engineering.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Design method and use of transversal dentated sill embedded depth of foundation based on debris flow soft foundation energy dissipating
InactiveCN101463593AAchieving a dynamic balance of scour-sedimentationLong-term safe operationClimate change adaptationMarine site engineeringEngineeringDrainage canal
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Stability measurement and calculation method for viscous debris flow entity silt arrester
ActiveCN107142891AAvoid cost-wasting pitfallsSolve the problem of simulation of stability change processDamsHydraulic engineering apparatusStability parameterComputer science
The invention discloses a stability measurement and calculation method for a viscous debris flow entity silt arrester, and aiming at avoiding the defect that a conventional measurement and calculation method only draws the most extreme situations into consideration and cannot demonstrate the dynamic change process of the stability of the silt arrester in the debris flow process, provides the stability measurement and calculation method which can reflect the dynamic change process of the stability of the silt arrester in the process that the entity silt arrester intercepts debris flow. The stability measurement and calculation method comprises the following steps: firstly, investigating and determining that the entity silt arrester belongs to an empty reservoir overflowing working condition or a half reservoir overflowing working condition; determining engineering parameters through field investigation, indoor soil tests and silt arrester design projects; and measuring and calculating the stability of the silt arrester by use of calculation methods of anti-slip stability parameters Kc(n-1) and stability against overturning parameters Ky(n-1) under different working conditions. The stability measurement and calculation method can be used for particularly measuring and calculating the stability of the silt arrester in the full reservoir overflowing state, can provide scientific basis and references for parameter optimal design, structural safety checkup and the like of debris flow control projects, avoids waste of the construction cost, is closer to the project reality and conforms to the requirements of actual engineering.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
V type discharging and guiding slot water power optimum section design method of viscous debris flow and application thereof
InactiveCN101435191AImprove discharge capacityCalculation method is simpleDamsProtective constructionGreek letter betaEngineering
The invention discloses a method for designing hydraulic optimum section of V-shaped drainage canal for viscous debris flow inclined wall and application thereof. Aiming at the default that the hydraulic optimum section can not be determined because the section form and size of the V-shaped drainage canal of the inclined wall are generally designed based on personal experience in the prior art, the invention discloses the method for designing hydraulic optimum section of V-shaped drainage canal for viscous debris flow inclined wall. The method first calculates the hydraulic optimum section size parameter Beta for the drainage canal; then calculates the hydraulic optimum section characteristic parameter S; then calculates the corresponding hydraulic diameter R of the hydraulic optimum section for the drainage canal; and finally calculates the slope depth h1 and canal bottom depth h2 of the hydraulic optimum section. The method is suitable for the control of viscous debris flow and can be used matching with other mainstay block engineering. Compared with the prior art, The method of the invention can reasonably determine the shape and size of the hydraulic optimum section of V-shaped drainage canal of inclined wall to obtain maximum flow discharge ability, has effective, fast, and simple calculation methods, and is adapted to the requirement of practical engineering.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Method for discriminating blocking type of window dam in debris flow interception process and application thereof
ActiveCN103343526AReasonable distinction between occlusion typesAdapt to actual engineering needsBarrages/weirsHydraulic engineering apparatusEffective heightEngineering
The invention discloses a method for discriminating the blocking type of a window dam in a debris flow interception process and application thereof. According to the method, the blocking type of the window dam is discriminated according to the type of debris flow, the grain size d 95 of debris flow solid matter, the opening width b of the window dam, the opening height h of the window dam, the total area S0 of the cross sections of the openings of the window dam, the cross section area S below the effective height of the window dam within channel width. The method can be used for verifying the blocking type of the window dam or guiding the opening design of the window dam. Compared with the prior art, the opening width, the opening height and the total opening area are taken into consideration, the influences of the opening width, the opening height and the total opening area on the blocking type of the window dam are reflected completely, and the blocking type of the window dam can be distinguished reasonably. Further, the method for discriminating the blocking type of the window dam in the debris flow interception process supplies basis to window dam design and meets the actual engineering demands.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
A structural design method of coarse-grained saline soil embankment based on uplift deformation control
ActiveCN109086511AScientific and reasonable designAvoid blindly determiningGeometric CADDesign optimisation/simulationPrillLunar soil
A structural design method of coarse-grained saline soil embankment based on uplift deformation control is proposed to scientifically and reasonably design the structure of high-speed railway or magnetic suspension coarse-grained saline soil embankment, which can meet the needs of practical engineering. The method comprises the following steps of: 1 determining the allowable uplift amount of the top surface of the embankment; 2 preliminary determination of embankment structure of coarse-grained saline soil; 3 determining the influence depth of saline heaving atmosphere of coarse-grained salinesoil embankment, calculating and determining the calculated thickness of coarse-grained saline soil uplift in embankment; 4 determining the temperature Ti 1 of the i-layer soil before cooling in winter and the lowest temperature Ti 2 appearing in the i-layer soil during cooling in winter; 5 determining the salt dilatancy index Csi of the i-layer soil, the salt swelling force sigma Ti, the initialvoid ratio e0i and the effective self-weight stress sigma y0i of the i-layer soil were determined when the temperature Ti 1 decreased to Ti 2; 6. calculating and determining the amount of embankmenttop surface uplift; 7. Performing judging, if yes, the embankment shall follow the steps 2, the structure of coarse-grained saline soil embankment being designed, If not, repeating steps 2 to 6, untilthe judging result is yes, to design a reasonable embankment for coarse-grained saline soil.
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
Beam type grating dam blocking performance judgment method and application
ActiveCN106096216AReasonable differentiation of occlusion performanceEasy accessGeometric CADData processing applicationsDiscriminantGrating
The invention discloses a beam type grating dam blocking performance judgment method. Aiming at the problem that in the prior art factors which can affect the blocking performance of a beam type grating dam are too briefly considered, the invention provides the beam type grating dam blocking performance judgment method which takes three main factors and relationship of the three factors, namely, the volume weight of debris flow, the grain composition of debris flow and the distance between transverse beams of the grating dam, into account firstly. According to the method, a blocking critical judgment index F is calculated according to the function relationship of the three factors, and furthermore, the blocking performance of the dam is judged according to different spaces corresponding to F. The invention further provides application of the method in design of the beam type grating dam. The application is to confirm a design value B of the distance among the transverse beams of the beam type grating dam. The method disclosed by the invention is reasonable in principle, simple and convenient in calculation process, easy in acquiring parameters in judgment equations, and particularly applicable to demands of the engineering field.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Method for calculating destabilization of rockfill of small-watershed ditch
InactiveCN106951725AExploring the characteristics of instabilityReasonably determine the instability valueSpecial data processing applicationsInformaticsMechanical equilibriumForce analysis
The invention discloses a method for calculating destabilization of rockfill of a small-watershed ditch and belongs to the technical field of geological hazard control engineering. The method is characterized by comprising the following steps: a. carrying out force analysis on unit-width rockfill of the small-watershed ditch; b. calculating flow velocity VC of debris flow, inferring a distinguishing calculation expression for the rockfill of the small-watershed ditch according to theory of mechanics; c. destabilizing the rockfill according to a mechanical equilibrium condition when a motive force stressed by the rockfill is greater than a resisting force stressed by the rockfill, so as to obtain a distinguishing calculation expression for destabilization of the rockfill in the ditch. According to the method, a destabilization value of the rockfill of the small-watershed ditch can be reasonably determined on the basis of strict theoretical derivation, and thus, a basis is provided for controlling and warning debris-flow disasters of small watersheds; the calculated result is high in accuracy, so that the method meets actual engineering demands.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY
Fluid cantilever-out horizontal distance measuring and calculating method and application thereof
InactiveCN107727355AOvercoming Overestimation of Sandy FlowsOvercoming the problem of the horizontal pick-up distance of the flow tongue of the debris flowHydrodynamic testingWater flowCantilever
The invention discloses a fluid cantilever-out horizontal distance measuring and calculating method and application thereof. The measuring and calculating method includes the steps of calculating thesand contained in fluid volume by determining the fluid volume weight and the volume weight of the solid substance in the fluid, calculating the fluid Froude number of a fluid cantilever-out point bydetermining the flow depth and the flow speed of the fluid cantilever-out point, calculating the correction coefficient of the fluid cantilever-out horizontal distance according to the sand containedin the fluid volume and the fluid Froude number of the fluid cantilever-out point, and finally calculating the fluid cantilever-out horizontal distance according to the correction coefficient of the fluid cantilever-out horizontal distance. The method is suitable for fluids of different-properties such as clear water, sand-containing water flow and debris flow, and can be used for reasonably determining the fluid cantilever-out horizontal distances for water of different properties, different cantilever-out point fluid flow depths, different fluid cantilever-out speeds, different fluid cantilever-out angles, different cantilever-out point fluid vertical depths, and different heights from the cantilever-out points to the downstream bed surfaces. The calculation method is simple, convenientand effective, and meets the requirements of actual engineering.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Calculation method for design longitudinal shrinking slope of ladder-pool debris flow drainage groove and application
The invention discloses a calculation method for a design longitudinal shrinking slope of a ladder-pool debris flow drainage groove and an application. The calculation method determines the average longitudinal shrinking slope of a natural channel, the total design length of the drainage groove and the suspending height of a ladder section in the site selection range of the drainage groove firstly; and then the dimensionless parameter slope ratio and pool configuration density are determined; the quantity of a deep pool section is determined; finally, the design longitudinal shrinking slope of the ladder-pool debris flow drainage groove is determined by the calculation formula of the design longitudinal shrinking slope. The method is based on strict theoretical derivation, defines the dimensionless parameter with a physical significance and determines the design longitudinal shrinking slope of the ladder-pool debris flow drainage groove rationally so as to provide a basis to the profile design of the drainage groove; the calculation is simple and convenient; the calculation result is high in precision and adaptable to the needs of actual projects.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Blowing-in fan and air conditioner with same
ActiveCN104421190AAvoid low air pressureIncrease the air supply distancePump componentsPump installationsEngineering
The invention discloses a blowing-in fan and an air conditioner with the same. The blowing-in fan comprises a cross flow portion, at least one centrifugal portion and at least one motor, wherein the cross flow portion comprises a cross flow volute and a cross flow wind wheel arranged in the cross flow volute; a first air inlet and a first air outlet are formed in the cross flow volute; the centrifugal portions are arranged on at least one end of the cross flow portion; each centrifugal portion comprises a centrifugal volute and a centrifugal wind wheel arranged in the centrifugal volute; a second air outlet and at least one second air inlet are formed in each centrifugal volute; the second air inlets are formed in at least one end of each centrifugal volute in the axial direction; each centrifugal wind wheel is spaced from the cross flow wind wheel; and the motors are used for driving the cross flow wind wheel and the centrifugal wind wheels to run. The blowing-in fan is high in blowing-in air pressure, long in blowing-in distance, uniform in heat exchange, small in noise and accurate in control.
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD
Debris flow silt arrester overflow port overflowing flow measuring and calculating method and application thereof
ActiveCN103321190BCalculation method is simpleAdapt to actual engineering needsBarrages/weirsEngineeringTopographic map
The invention discloses a debris flow silt arrester overflow port overflowing flow measuring and calculating method and application thereof. The method includes the steps: determining the volume weight of debris flow, the gradient of a ditch, the width of an overflow port, the bottom width of the overflow port, the width of the ditch at a dam site, the position coefficient of the overflow port, the slope coefficient of the overflow port and the designed mud depth by means such as field investigation measurement, field volume weight test and large-scale topographical map measurement and calculation; respectively substituting acquired parameters into a flow coefficient and overflowing flow formula to obtain overflow port overflowing flow under different conditions, and accordingly checking the overflowing capacity of the designed silt arrester overflow port. Compared with the prior art, the method integrates ditch conditions and debris flow properties into account, a flow coefficient equation and an overflow port overflowing flow equation are obtained by theoretical derivation, the flow coefficient can be uniquely determined, so that the overflowing flow can be reasonably determined, a design basis can be provided for debris flow disaster prevention engineering design, and the calculating method is simple and meets practical engineering requirements.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Heave-resistant design method of expansive soil composite pile foundations at bottom of subgrade
A heave-resistant design method of expansive soil composite pile foundations at the bottom of a subgrade comprises the steps of determining a design target, surveying geotechnical parameters, initially selecting and determining composite pile foundation parameters, determining calculation parameters, calculating a heave amount of the top surface of the subgrade, and determining composite pile foundation design parameters. The heave-resistant design method of the expansive soil composite pile foundations at the bottom of the subgrade comprehensively considers three factors of a composite pile foundation replacement function, a side surface anchorage function and a subgrade soil-filling energy-dissipation effect. The heave-resistant design method is proposed on the basis of taking the heaveamount of the top surface of the subgrade as a design control target, and is capable of scientifically and reasonably carrying out the heave-resistant design of the expansive soil composite pile foundations, effectively controlling the number of foundation reinforcement engineering, achieving the goal of reducing the railway construction cost, making up for the blank of specifications and adaptingto actual engineering needs.
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
Stability calculation method and application of solid sand check dam for viscous debris flow
ActiveCN107142891BAvoid cost-wasting pitfallsSolve the problem of simulation of stability change processDamsHydraulic engineering apparatusStability parameterComputer science
The invention discloses a stability measurement and calculation method for a viscous debris flow entity silt arrester, and aiming at avoiding the defect that a conventional measurement and calculation method only draws the most extreme situations into consideration and cannot demonstrate the dynamic change process of the stability of the silt arrester in the debris flow process, provides the stability measurement and calculation method which can reflect the dynamic change process of the stability of the silt arrester in the process that the entity silt arrester intercepts debris flow. The stability measurement and calculation method comprises the following steps: firstly, investigating and determining that the entity silt arrester belongs to an empty reservoir overflowing working condition or a half reservoir overflowing working condition; determining engineering parameters through field investigation, indoor soil tests and silt arrester design projects; and measuring and calculating the stability of the silt arrester by use of calculation methods of anti-slip stability parameters Kc(n-1) and stability against overturning parameters Ky(n-1) under different working conditions. The stability measurement and calculation method can be used for particularly measuring and calculating the stability of the silt arrester in the full reservoir overflowing state, can provide scientific basis and references for parameter optimal design, structural safety checkup and the like of debris flow control projects, avoids waste of the construction cost, is closer to the project reality and conforms to the requirements of actual engineering.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Calculation method of energy dissipation coefficient of subgrade filling under uplift action of foundation
ActiveCN108999221AThe calculation method is simple and fastAdapt to actual engineering needsFoundation testingGreek letter betaEngineering
The invention discloses a calculation method of an energy dissipation coefficient of subgrade filling under the uplift action of a foundation. The energy dissipation coefficient of the subgrade filling under the uplift action of the foundation is determined scientifically and rationally, and the needs of practical engineering design and construction are met. The calculation method comprises the following steps that (1), a trenching sand filling method or a trenching irrigation method or a nuclear densimeter method is used for determining the subgrade filling dry density [rho]d, indoor compaction experiments are used for determining the largest subgrade filling dry density [rho]dmax, and the compaction coefficient K of the subgrade filling is determined; (2), the reciprocal beta of a limitvalue of the 'compression effect' coefficient of the subgrade filling is determined; (3), the reciprocal alpha of the 'compression effect' coefficient of an initial tangent line of the subgrade filling is determined; and (4), the energy dissipation coefficient kappa of the subgrade filling under the uplift action of the foundation is determined.
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
A grouting repair method for regenerating concealed karst at the subgrade base of existing ballastless track
ActiveCN108930265BSolving Grouting Repair ProblemsPrevent arching deformationRailway tracksSoil preservationHigh densityTrackway
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
Method for discriminating blocking type of window dam in debris flow interception process and application thereof
ActiveCN103343526BReasonable distinction between occlusion typesAdapt to actual engineering needsBarrages/weirsHydraulic engineering apparatusMining engineeringEffective height
The invention discloses a method for discriminating the blocking type of a window dam in a debris flow interception process and application thereof. According to the method, the blocking type of the window dam is discriminated according to the type of debris flow, the grain size d 95 of debris flow solid matter, the opening width b of the window dam, the opening height h of the window dam, the total area S0 of the cross sections of the openings of the window dam, the cross section area S below the effective height of the window dam within channel width. The method can be used for verifying the blocking type of the window dam or guiding the opening design of the window dam. Compared with the prior art, the opening width, the opening height and the total opening area are taken into consideration, the influences of the opening width, the opening height and the total opening area on the blocking type of the window dam are reflected completely, and the blocking type of the window dam can be distinguished reasonably. Further, the method for discriminating the blocking type of the window dam in the debris flow interception process supplies basis to window dam design and meets the actual engineering demands.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Judgment method and application of occlusion performance of beam-grid dam
ActiveCN106096216BReasonable differentiation of occlusion performanceEasy accessGeometric CADData processing applicationsDiscriminantGrating
The invention discloses a beam type grating dam blocking performance judgment method. Aiming at the problem that in the prior art factors which can affect the blocking performance of a beam type grating dam are too briefly considered, the invention provides the beam type grating dam blocking performance judgment method which takes three main factors and relationship of the three factors, namely, the volume weight of debris flow, the grain composition of debris flow and the distance between transverse beams of the grating dam, into account firstly. According to the method, a blocking critical judgment index F is calculated according to the function relationship of the three factors, and furthermore, the blocking performance of the dam is judged according to different spaces corresponding to F. The invention further provides application of the method in design of the beam type grating dam. The application is to confirm a design value B of the distance among the transverse beams of the beam type grating dam. The method disclosed by the invention is reasonable in principle, simple and convenient in calculation process, easy in acquiring parameters in judgment equations, and particularly applicable to demands of the engineering field.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
A karst grouting reinforcement method adjacent to the existing ballastless track subgrade
ActiveCN109056731BPrevent arching deformationSolve the problem of karst grouting reinforcementRoadwaysFoundation engineeringHigh densityTrackway
The invention discloses a karst grouting reinforcement method near an existing ballastless track roadbed; and the newly built building substrate karst grouting reinforcement near the existing ballastless track roadbed is scientifically and reasonably performed to effectively prevent the upwarp deformation of the ballastless track roadbed. The method comprises the following steps: (1) related parameters are determined through data collection or a high-density electrical method or a ground penetrating radar or an earthquake reflecting method or electromagnetic wave CT; (2) the weight gamma d andthe internal friction angle FORMULA of a substrate karst top covering layer of the existing roadbed are determined through scene investigation or data collection or drilling sampling or indoor geotechnical tests; (3) the grouting pressure omega z of the newly built building substrate karst is determined through calculation; and (4) the newly built building substrate is drilled to a karst distribution area; and the grouting reinforcement is performed according to the grouting pressure not higher than the grouting pressure omega z determined in the step (3).
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
A structural design method of coarse-grained saline soil embankment based on uplift deformation control
ActiveCN109086511BScientific and reasonable designAvoid blindly determiningGeometric CADDesign optimisation/simulationSoil scienceDeformation control
A coarse-grained saline soil embankment structure design method based on uplift deformation control is used to scientifically and rationally design the structure of a high-speed railway or a maglev coarse-grained saline soil embankment, and can be adapted to actual engineering needs. It includes the following steps: ① Determine the allowable uplift of the top surface of the embankment; ② Preliminarily determine the structure of the coarse-grained saline soil embankment; 0 , calculate and determine the uplift thickness h of coarse grained saline soil in the embankment 0 ; ④ Determine the temperature T of the i-th layer of soil before cooling in winter i1 , the lowest temperature T that occurs in the i-th layer of soil during the cooling period in winter i2 ;⑤ Determine the salt expansion index C of the i-th layer of soil si ; Determine the temperature T i1 down to T i2 The salt expansion force σ of the back i-th layer of soil Ti , temperature T i1 The initial void ratio e of the lower i-th layer of soil 0i , the effective self-weight stress σ of the i-th layer of soil y0i ;6 Calculate and determine the uplift of the top surface of the embankment. ⑦ Determine whether the embankment is satisfied. If it is satisfied, the embankment shall be designed according to the coarse grained saline soil embankment structure initially determined in step ②. Coarse grained saline soil embankment.
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
Design method and use of transversal dentated sill embedded depth of foundation based on debris flow soft foundation energy dissipating
InactiveCN101463593BGuaranteed safe operationLow costClimate change adaptationMarine site engineeringEngineeringDrainage canal
The invention discloses a method for designing the embedded depth of foundation of the transverse dentated sill based on the mud-rock flow soft ground energy dissipation and the application thereof. In the method, firstly, the energy consumption hi during the fall of mud-rock flow through the transverse dentated sill is calculated; subsequently, the critical longitudinal slope gradient of the initiation and deposit of the mud-rock flow i0 is calculated; subsequently, the energy consumption coefficient Phi when the mud-rock flow passes the transverse dentated sill and the scour depth below thesill Delta when the mud-rock flow passes the transverse dentated sill are calculated; and finally, the embedded depth of foundation H of the transverse dentated sill is calculated. The invention is applicable to the prevention and treatment of mud-rock flow with hyperconcentrated bi-phase two-dimensional flow, can form a drainage canal with a guide side wall or coordinate with a dam for sand collection to be used for prevention and treatment of the mud-rock flow. Compared with the prior art, on the basis of fully guaranteeing the secure operation of the transverse dentated sill, the method can reasonably confirm the embedded depth of foundation of the transverse dentated sill and save the project cost at utmost, thus being beneficial to the later operation management of the project, furthermore, the calculation method is effective, fast, easy and convenient, and meets the actual project requirement.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
A Design Method of Saline Soil Cutting Subgrade Bed Structure Based on Uplift Deformation Control
ActiveCN108984923BScientific and reasonable designAdapt to actual engineering needsGeometric CADSpecial data processing applicationsSoil scienceDeformation control
A design method of saline soil cutting subgrade bed structure based on uplift deformation control to scientifically and rationally design high-speed railway or maglev saline soil cutting subgrade bed structure, and can adapt to actual engineering needs. It includes the following steps: ① determine the allowable uplift of the top surface of the cutting bed; ② preliminarily determine the structure of the saline soil cutting bed; 0 , calculate and determine the calculated thickness h of the uplift of the subgrade bed of saline soil cutting 0 ; ④ Determine the temperature T of the jth layer of soil in the structural layer under the subgrade layer before cooling in winter within the calculated thickness range of the uplift j ⑤Coarse-grain saline soil samples and saline soil foundation soil samples within the range of uplift calculation thickness were collected on site, and salt expansion test, compression rebound test, water content test, soil particle specific gravity test and gravity test were carried out indoors. Test to determine the salt expansion index C of the jth layer soil of the structural layer under the subgrade sj ⑥Calculate and determine the uplift of the top surface of the cutting subgrade bed ⑦Determine whether it is satisfied, if not, repeat the work from step ② to step ⑥ until it is satisfied
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
A Calculation Method of Energy Dissipation Coefficient of Subgrade Filling under the Action of Foundation Uplift
ActiveCN108999221BThe calculation method is simple and fastAdapt to actual engineering needsFoundation testingClassical mechanicsCalculation methods
The invention discloses a calculation method of an energy dissipation coefficient of subgrade filling under the uplift action of a foundation. The energy dissipation coefficient of the subgrade filling under the uplift action of the foundation is determined scientifically and rationally, and the needs of practical engineering design and construction are met. The calculation method comprises the following steps that (1), a trenching sand filling method or a trenching irrigation method or a nuclear densimeter method is used for determining the subgrade filling dry density [rho]d, indoor compaction experiments are used for determining the largest subgrade filling dry density [rho]dmax, and the compaction coefficient K of the subgrade filling is determined; (2), the reciprocal beta of a limitvalue of the 'compression effect' coefficient of the subgrade filling is determined; (3), the reciprocal alpha of the 'compression effect' coefficient of an initial tangent line of the subgrade filling is determined; and (4), the energy dissipation coefficient kappa of the subgrade filling under the uplift action of the foundation is determined.
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
Soil retaining assembly and connecting embedded steel bar anchoring method thereof
ActiveCN114396071AEffective tensionEffective transmission of tensionArtificial islandsUnderwater structuresAgricultural engineeringRebar
The invention relates to the technical field of soil retaining, in particular to a soil retaining assembly and a connecting embedded steel bar anchoring method.The soil retaining assembly comprises a soil retaining wall and a drilled pile, an inner arc-shaped steel plate is arranged on the inner side of an annular reinforcement cage, an outer arc-shaped steel plate is arranged on the outer side of the annular reinforcement cage, the soil retaining wall is connected with connecting embedded steel bars, and the connecting embedded steel bars penetrate through the inner arc-shaped steel plate and the outer arc-shaped steel plate; and the inner arc-shaped steel plate and the outer arc-shaped steel plate clamp the side wall of the annular reinforcement cage from the two sides of the side wall of the annular reinforcement cage through the first locking nut and the second locking nut. According to the soil retaining assembly, by rotating the first locking nut and the second locking nut, the inner arc-shaped steel plate and the outer arc-shaped steel plate clamp the side wall of the annular reinforcement cage from the two sides of the side wall of the annular reinforcement cage so as to complete connection anchoring of the connecting embedded steel bar and the drilled pile, and by adjusting the positions of the second locking nut and the connecting embedded steel bar, the connecting embedded steel bar and the drilled pile can be connected and anchored. And the connecting embedded steel bars can be effectively tensioned, so that the connecting embedded steel bars can effectively transmit tension between the retaining wall and the drilled piles.
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
Calculation method and application of vertical gradient in design of ladder-deep pool type debris flow drainage trough
The invention discloses a calculation method for a design longitudinal shrinking slope of a ladder-pool debris flow drainage groove and an application. The calculation method determines the average longitudinal shrinking slope of a natural channel, the total design length of the drainage groove and the suspending height of a ladder section in the site selection range of the drainage groove firstly; and then the dimensionless parameter slope ratio and pool configuration density are determined; the quantity of a deep pool section is determined; finally, the design longitudinal shrinking slope of the ladder-pool debris flow drainage groove is determined by the calculation formula of the design longitudinal shrinking slope. The method is based on strict theoretical derivation, defines the dimensionless parameter with a physical significance and determines the design longitudinal shrinking slope of the ladder-pool debris flow drainage groove rationally so as to provide a basis to the profile design of the drainage groove; the calculation is simple and convenient; the calculation result is high in precision and adaptable to the needs of actual projects.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Karst grouting reinforcement method near existing ballastless track roadbed
ActiveCN109056731APrevent arching deformationSolve the problem of karst grouting reinforcementRoadwaysFoundation engineeringGeomorphologyHigh density
The invention discloses a karst grouting reinforcement method near an existing ballastless track roadbed; and the newly built building substrate karst grouting reinforcement near the existing ballastless track roadbed is scientifically and reasonably performed to effectively prevent the upwarp deformation of the ballastless track roadbed. The method comprises the following steps: (1) related parameters are determined through data collection or a high-density electrical method or a ground penetrating radar or an earthquake reflecting method or electromagnetic wave CT; (2) the weight gamma d andthe internal friction angle FORMULA of a substrate karst top covering layer of the existing roadbed are determined through scene investigation or data collection or drilling sampling or indoor geotechnical tests; (3) the grouting pressure omega z of the newly built building substrate karst is determined through calculation; and (4) the newly built building substrate is drilled to a karst distribution area; and the grouting reinforcement is performed according to the grouting pressure not higher than the grouting pressure omega z determined in the step (3).
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
A method for measuring and calculating the horizontal distance of fluid picking out and its application
InactiveCN107727355BWide applicabilityCalculation method is simpleHydrodynamic testingWater flowCantilever
The invention discloses a fluid cantilever-out horizontal distance measuring and calculating method and application thereof. The measuring and calculating method includes the steps of calculating thesand contained in fluid volume by determining the fluid volume weight and the volume weight of the solid substance in the fluid, calculating the fluid Froude number of a fluid cantilever-out point bydetermining the flow depth and the flow speed of the fluid cantilever-out point, calculating the correction coefficient of the fluid cantilever-out horizontal distance according to the sand containedin the fluid volume and the fluid Froude number of the fluid cantilever-out point, and finally calculating the fluid cantilever-out horizontal distance according to the correction coefficient of the fluid cantilever-out horizontal distance. The method is suitable for fluids of different-properties such as clear water, sand-containing water flow and debris flow, and can be used for reasonably determining the fluid cantilever-out horizontal distances for water of different properties, different cantilever-out point fluid flow depths, different fluid cantilever-out speeds, different fluid cantilever-out angles, different cantilever-out point fluid vertical depths, and different heights from the cantilever-out points to the downstream bed surfaces. The calculation method is simple, convenientand effective, and meets the requirements of actual engineering.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Air blower and air conditioner having the same
ActiveCN104421190BAvoid low air pressureIncrease the air supply distancePump componentsPump installationsEngineeringAir blower
The invention discloses a blowing-in fan and an air conditioner with the same. The blowing-in fan comprises a cross flow portion, at least one centrifugal portion and at least one motor, wherein the cross flow portion comprises a cross flow volute and a cross flow wind wheel arranged in the cross flow volute; a first air inlet and a first air outlet are formed in the cross flow volute; the centrifugal portions are arranged on at least one end of the cross flow portion; each centrifugal portion comprises a centrifugal volute and a centrifugal wind wheel arranged in the centrifugal volute; a second air outlet and at least one second air inlet are formed in each centrifugal volute; the second air inlets are formed in at least one end of each centrifugal volute in the axial direction; each centrifugal wind wheel is spaced from the cross flow wind wheel; and the motors are used for driving the cross flow wind wheel and the centrifugal wind wheels to run. The blowing-in fan is high in blowing-in air pressure, long in blowing-in distance, uniform in heat exchange, small in noise and accurate in control.
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD
Anti-heave design method of expansive soil composite pile foundation at the bottom of subgrade
ActiveCN108589434BControl quantityReduce construction costsRailway tracksDesign controlDesign methods
A heave-resistant design method of expansive soil composite pile foundations at the bottom of a subgrade comprises the steps of determining a design target, surveying geotechnical parameters, initially selecting and determining composite pile foundation parameters, determining calculation parameters, calculating a heave amount of the top surface of the subgrade, and determining composite pile foundation design parameters. The heave-resistant design method of the expansive soil composite pile foundations at the bottom of the subgrade comprehensively considers three factors of a composite pile foundation replacement function, a side surface anchorage function and a subgrade soil-filling energy-dissipation effect. The heave-resistant design method is proposed on the basis of taking the heaveamount of the top surface of the subgrade as a design control target, and is capable of scientifically and reasonably carrying out the heave-resistant design of the expansive soil composite pile foundations, effectively controlling the number of foundation reinforcement engineering, achieving the goal of reducing the railway construction cost, making up for the blank of specifications and adaptingto actual engineering needs.
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
Calculation Method for Lateral Extrusion Deformation of Subgrade Under Subgrade Load
ActiveCN108931422BThe calculation result is accurateEasy to calculateMaterial strength using tensile/compressive forcesTriaxial shear testClassical mechanics
The invention relates to a method for measuring and calculating lateral extrusion deformation of a middle-compressibility normally consolidated soil foundation under a subgrade load, particularly a method for synchronous measurement and calculation of lateral extrusion deformation of a foundation under a subgrade slope toe through measured vertical sedimentation of a sedimentation plate in a middle-compressibility normally consolidated soil foundation. The method is designed for solving a problem that modeling and calculation utilizing finite element and finite difference software at present are high in error. The changing rule of the Poisson ratio of in-situ soil along with confining pressure at each depth is determined through in-situ sampling and an indoor triaxial test, the Poisson ratio is determined according to a subgrade load and an overlaying soil layer load, and the lateral extrusion deformation area of the foundation under the slope toe at each layer is determined through anequation. The method achieves correction based on a high number of local layering sedimentation observation results and a theoretical calculation result so that a theoretical correction coefficient in a layering sedimentation percent is utilized to determine a value for a normally consolidated soil area, and the lateral extrusion deformation of a middle-compressibility normally consolidated soilfoundation in the area is determined. The method has an advantage of a more precise measuring and calculating result.
Owner:CHINA RAILWAY 19TH BUREAU GRP 1ST ENG +1
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com