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262 results about "Ground subsidence" patented technology
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Multi-source monitoring technology fusion-based ground subsidence integrated monitoring method
ActiveCN107389029ATo achieve the purpose of encryption monitoring siteMeet the requirements of settlement monitoringHeight/levelling measurementGround subsidenceTechnology fusion
The invention discloses a multi-source monitoring technology fusion-based ground subsidence integrated monitoring method. The method comprises laying benchmarks and GPS monitoring points in a ground subsidence focal monitoring area, laying a CR-GPS-benchmark integrated point in a ground stable region, in the same time sequence, acquiring GPS data, ground meteorological data, MODIS data, SAR images and leveling data, calculating GPS data through the combination of synchronous observation data from surrounding CGPS stations and IGS stations and ground meteorological data, calculating atmospheric delay phase information through the combination of GPS data, ground meteorological data and MODIS data, extracting stable PS point and PS point deformation information in an initial differential interferometric phase map, building a ground subsidence vertical deformation field through deformation formation corresponding to the PS points, GPS points, benchmarks and integrated points, constructing a spatial data field through fusion of a horizontal deformation field and a vertical deformation field and acquiring ground subsidence three-dimensional deformation field information having high temporal-spatial resolution. The method can acquire ground three-dimensional deformation information with a large range, a high precision and high temporal-spatial resolution.
Owner:北京市水文地质工程地质大队 +1
Trenchless pipeline traversing method integrating drilling and propping
InactiveCN104864177AStrong stratum adaptabilityPlay a supporting rolePipe laying and repairGround subsidenceLine tubing
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN) +1
Automatic tamper type waste filling hydraulic support
InactiveCN102135006AGood topping effectSmooth connectionMaterial fill-upMine roof supportsGround subsidenceCut and fill
The invention discloses an automatic tamper type waste filling hydraulic support which comprises a base and a top beam, wherein the base and the top beam are connected by uprights, the front end of the top beam is provided with a forepole, the rear end of the top beam is provided with a scraper conveyor and further connected with an internally-telescopic extrusion scraping plate by a retractable jack which is arranged horizontally; the rear side of the base is provided with the extrusion scraping plate by a first and a second extrusion jacks, and the first extrusion jack is horizontally arranged. The automatic tamper type waste filling hydraulic support solves the problems that conventional cut and fill hydraulic support equipment can not ensure top filling of filler and has poor tamper intensity; in addition, the automatic tamper type waste filling hydraulic support realizes the high-strength supporting for a gob roof by virtue of waste fillers, effectively eliminates the defect of ground subsidence, realizes safe recovery for part of permanent coal pillars, corner coals and coal under buildings on the premise of not destroying factories and relocating villages, and improves the recovery of the coal resources. The invention is also suitable for various solid fillers such as coal ash, river sand, loess and the like.
Owner:HENAN POLYTECHNIC UNIV
Borehole profile rock and soil mass layered deformation optical fiber measuring method
InactiveCN103438820ARealize distributed measurement of layered deformationOvercoming DiscontinuitiesUsing optical meansGround subsidenceMeasurement point
The invention discloses a borehole profile rock and soil mass layered deformation optical fiber measuring method. A measurement point is selected, and a soil layer is cataloged after being bored. When a hole is formed, a sensing optical fiber is laid and then the hole is backfilled. When the rock and soil mass around the sensing optical fiber deforms, the sensing optical fiber is driven to be deformed due to wrapping force of surrounding soil mass. Strain distribution of the sensing optical fiber is measured via BOTDR / A and other technologies so that strain distribution state of corresponding positions of a borehole profile is obtained. Integration of the corresponding positions is performed on the obtained strain along the optical fiber so that deformation state of each soil layer in deep rock and soil mass can be obtained. Therefore, distributed type measurement of borehole profile rock and soil mass layered deformation is realized. The method is applicable to the field of rock and soil mass deformation monitoring, such as ground subsidence, ground collapse, mines, etc.
Owner:NANJING UNIV +2
Pipe jacking construction technology through water-mud balance
The invention discloses a pipe jacking construction technology through water-mud balance. The pipe jacking construction technology comprises the steps of construction preparation, equipment mounting and debugging, pipe jacking machine out of a hole, pipe section jacking construction, intermediate jacking station jacking construction, main top jacking and the like, and circulation is conducted till jacking is finished. Through the construction technology, construction is conducted especially aiming at the specific soil texture of the pipe jacking construction technology, the operation difficulty is greatly reduced, the maximum amount of excavation is increased, the construction technology is easy, the construction progress is quick, the construction difficult problems such as ground subsidence are controlled within the range stipulated by standards, and the construction technology is suitable for being applied and popularized.
Owner:ZHEJIANG BAOTIAN ENVIRONMENT CONSTR CO LTD
Method for determining influence of waterproof curtain leakage below foundation pit excavation surface on surroundings
The invention provides a method for determining the influence of a waterproof curtain leakage below a foundation pit excavation surface on surroundings. The method comprises the steps that on the basis of scene investigation and foundation pit information collection, the ultrasonic imaging CT technology is adopted for determining the position of the waterproof curtain leakage and the area of the leakage, and a measured value of well water level observation and other data are obtained through a foundation pit water pumping test; a three-dimensional fluid-solid coupled model is built, a leakage unit is arranged at the position of the waterproof curtain leakage according to the area of the leakage, the water pumping test is simulated, analysis model calculation is performed, and finally a calculated value of the well water level observation is obtained; according to the fitting condition of the measured value and the calculated value, permeability coefficients at the position of the waterproof curtain leakage are determined; and the permeability coefficients at the position of the leakage are input to the leakage unit, leakage consolidation simulation is performed, and finally the underground water level and ground subsidence amount of a foundation fit are determined. The method is simple and convenient to popularize, has the great application value and is applicable to solving the problem of the waterproof curtain leakage below the foundation pit excavation surface.
Owner:SHANGHAI JIAO TONG UNIV
Method for constructing isolation pile for shield tunnel to go through deformation control of buildings and structures at short distance
ActiveCN101761237AAvoid shockReduce lossesBuilding repairsBulkheads/pilesGround subsidenceShortest distance
The invention relates to a method for constructing an isolation pile, in particular to a method for constructing an isolation pile applied for a to go through a shield tunnel for deformation control of historic structures, buildings and structures at short distance; the method is characterized by employing an extension-type pile sinking and pore-forming steps, an outer sleeve and a spiral drill pipe arranged in the outer sleeve are sunk respectively by clockwise and counterclockwise drilling method through a full circle swinging jacketing machine; the middle and outer sleeve rotate counterclockwise, the spiral drill pipe rotates clockwise to take earth out of the outer sleeve and serves as a protective wall for the outer sleeve and assists in double size inter-pile slip casting of cement paste and water glass, thus effectively controlling subsidence caused in the process of constructing the isolation pile and controlling ground subsidence caused when a shield passes through the historic structures and ensuring structure safety of the historic structures.
Owner:SHANGHAI TUNNEL ENG CO LTD
Method for detecting influence of underground construction on structure of ground building
InactiveCN103310039AScientific and reliable design process principleSimple and accurate data collectionSpecial data processing applicationsGround subsidenceElement model
The invention belongs to the technical field of geology prediction, and relates to a method for detecting influence of underground construction on a structure of a ground building. The method comprises the following steps: firstly detecting a ground subsidence value and the vibration of a concrete construction during blast, determining surface movement parameters by using a random medium theory back analysis method, adopting a population-level-based adaptive genetic algorithm, and using a back analysis calculation program prepared by Matlab to perform back analysis of the surface movement parameters; calculating the ground subsidence value by a random medium theory according to the obtained surface movement parameters; and building a concrete construction finite element model after detecting the concrete construction and component sizes on site, then calculating concrete construction stress of the ground building under the action of subsidence and blast, and lastly extracting the stress and performing quantitative damage prediction on the ground building structure. The process principle of the design is scientific and reliable, the data acquisition is simple and accurate, the calculation analysis is good in reliability and high in precision, the prediction result is accurate, the safety is good, and environment protection is realized.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY
Method and system for decision making and early warning based on ground subsidence monitoring
InactiveCN104778369AIntelligent analysis and processingBuild feature richMeasurement devicesSpecial data processing applicationsStatistical analysisData management
The invention discloses a method and a system for decision making and early warning based on ground subsidence monitoring. The method comprises the following steps of setting a plurality of monitoring points, and positioning the monitoring points in a monitoring map, so as to obtain the monitoring data; calculating and analyzing the monitoring data, so as to obtain the feature values of the monitoring data; establishing a single measuring point calculating model, a multi-measuring point calculating model and a time sequence model; determining the parameters of the models, so as to obtain a single measuring point predicting model, a multi-measuring point predicting model and a time sequence predicting model; generating a subsidence hazard level judging rule; obtaining the to-be-monitored data, and calculating the subsidence amount or subsidence rate of each model; determining the ground subsidence hazard level of a monitoring point on the basis of the subsidence amount or subsidence rate of each model according to the subsidence hazard level judging rule, and performing early warning. The system comprises a monitoring point positioning module, a data obtaining module, a data analysis module and a display module. The method and the system have the advantages that the monitoring, decision making and early warning on the ground subsidence are performed, and the integrated data management and processing are realized.
Owner:HOHAI UNIV
Simulator for blocking groundwater seepage by underground structure
The invention discloses a simulator for blocking groundwater seepage by an underground structure, belonging to the technical field of building engineering, and comprising a water tank, a model box, baffles, a phreatic aquifer, an aquiclude, a confined aquifer, a displacement meter and a water level observation pipe, wherein the water tank is connected with a model box, the model box is internally and vertically provided with a plurality of baffles, the phreatic aquifer, the aquiclude and the confined aquifer are sequentially and horizontally paved in the model box from the top down, the displacement meter is vertically installed on the surface of the phreatic aquifer, and the water level observation pipe is vertically embedded in the confined aquifer of the model box and sequentially perforates the phreatic aquifer and the aquiclude. By adopting the invention, groundwater three-dimensional seepage and soil mass deformation condition of the soil mass having the underground structure at each moment can be conveniently and efficiently observed, and real, exact and efficient parameters are provided for the design and the construction by analyzing test results, such as water head change, the ground subsidence distribution and the like, thereby the high efficiency and the safety of an urban underground engineering construction can be ensured.
Owner:SHANGHAI JIAO TONG UNIV
Shield construction ground subsidence prediction system and method based on big data analysis
InactiveCN107092990AImprove real-time predictionGuaranteed real-timeForecastingDesign optimisation/simulationGround subsidenceData platform
The invention discloses a shield construction ground subsidence prediction system and a method based on big data analysis, and mainly aims to solve the problem that ground subsidence cannot be predicted in an efficient and timely manner in a shield construction big data scene. A big data platform comprises a data collection module, a data preprocessing module, a feature extraction module, a prediction model building module, a model application module, and the like, which provide massive data storage and parallel computing services, and constitute the ground subsidence prediction system. The prediction method comprises the following steps: building a big data platform; collecting ground subsidence data during shield construction; preprocessing the data; extracting features; building a ground subsidence prediction model; packaging the function interfaces of the prediction model; and predicting ground subsidence in the construction process. The whole scheme is rigorous and complete in design, has massive data storage and parallel computing ability, is efficient and accurate in ground subsidence prediction, is used to predict ground subsidence caused by subway construction, and ensures the project quality and safety.
Owner:XIDIAN UNIV
Ground subsidence prediction system and method based on support vector machine
ActiveCN107153843APractical engineering valueWith redundancyDatabase management systemsCharacter and pattern recognitionGround subsidenceConfidence interval
The invention discloses a ground subsidence prediction system and a method based on a support vector machine, which are mainly used to the problem that the supporting system cannot satisfy the demand for analysis of mass data in the process of shield construction. The system comprises a Hadoop big data analysis platform, a data collection module, a data preprocessing module, a model building module, and a subsidence prediction module. In the prediction method, for de-noising in preprocessing, a clustering algorithm based on confidence interval estimation and the Pauta criterion is proposed for abnormal point detection. In prediction model building, the iterative calculation process of the weight vector is updated with the average value of N partitions, which, together with stochastic gradient descent, enhances the training speed. The system has the ability to store and analyze mass data and the ability of high-performance redundancy. Real-time and efficient data analysis is realized. The system and the method are used for ground subsidence prediction in the process of shield construction to provide reference and adjustment basis for project managers and construction operators.
Owner:XIDIAN UNIV
H-shaped waterproof curtain construction process
ActiveCN101781889ALittle construction disturbanceOpen working surfaceBulkheads/pilesGround subsidenceEngineering
The invention relates to an H-shaped waterproof curtain construction process. The process comprises the following steps: installing two cutoff walls 2-3m away from the both sides of the outside of a tunnel side wall, installing two rows of staggered jet grouting piles or mixing piles on an upper soil layer or sand layer to stop water and installing a transverse two-row staggered jet grouting piles or mixing piles between the two cutoff walls every 100-150m along the tunnel to form a closed waterproof curtain wall. Therefore, the construction technical problem of the waterproof curtain and advance pre-reinforcement for underground engineerings such as shallow tunnels and subways can be solved. The process is characterized by simple construction process, wide working face and fast construction pace, the tunnel deformation and ground subsidence are effectively controlled and the safety and stability of the tunnel are increased. The process can be widely used for the construction of waterproof curtain and advance pre-reinforcement for underground engineerings such as shallow tunnels and subways.
Owner:THE FIFTH ENG CO LTD OF CHINA TIESIJU CIVIL ENG GRP
Ultra-deep foundation pit pumping based ground subsidence intelligent early-warning method and monitoring system
InactiveCN105912798AReduce the risk of engineering accidents induced by pumping confined waterReduce the risk of engineering accidentsDesign optimisation/simulationSpecial data processing applicationsGround subsidenceLine sensor
The present invention discloses an ultra-deep foundation pit pumping based ground subsidence intelligent early-warning method and monitoring system. The ground subsidence intelligent early-warning method comprises: S1. in combination with on-site reality, laying a wireless sensor at a monitoring point, so as to obtain an on-site measurement database; S2. based on on-site pumping experimental data of an ultra-deep foundation pit, performing inversion analysis on a hydrologic geological parameter by adopting groundwater flow software, and performing inversion analysis on each earth-layer project geological parameter by adopting finite element software, and establishing an ultra-deep foundation pit infinite element three-dimensional numerical model that is closest to the on-site reality, so as to obtain a ground subsidence threshold; S3. constructing a gray prediction model to perform dynamic prediction; and S4. according to an intelligent prediction and determination result, enabling an early-warning system to predict a risk, so as to implement intelligent and automated monitoring and early-warning. The method and system are capable of effectively monitoring ground subsidence invited by ultra-deep foundation pit piestic water extraction, and achieve intelligent, precise and automated ground subsidence monitoring and early-warning.
Owner:SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
Construction method suitable for up-down overlapped tunnel with small clear space and long distance under weak geological condition
ActiveCN105332710AReduce settlementImprove bearing capacityUnderground chambersTunnel liningGround subsidenceTunneling length
The invention discloses a construction method suitable for an up-down overlapped tunnel with the small clear space and long distance under the weak geological condition. The up-down overlapped tunnel comprises an upper hole tunnel body and a lower hole tunnel body, wherein the tunnel diameter of the upper hole tunnel body is the same as that of the lower hole tunnel body, and the tunnel length of the upper hole tunnel body is largely equal to that of the lower hole tunnel body. Both the upper hole tunnel body and the lower hole tunnel body are of a tunnel structure formed by tube pieces, the vertical clear space between the upper hole tunnel body and the lower hole tunnel body is smaller than 0.7D(shield diameter), and the tunnel length is larger than 1000 m. The shield construction method includes the steps that after the lower hole tunnel body is completed according to a conventional shield construction method, the measures of a shield high-altitude starting platform, up-down tunnel interlayer soil body deep hole grouting reinforcement, lower hole tunnel supporting steel ring reinforcement, a shield high-altitude receiving platform and the like are taken, so that the influence on the formed lower hole tunnel body by shield construction of the upper hole tunnel body and the secondary overlapping effect of overlapped tunnel sedimentation are reduced, and it is guaranteed that deformation of the lower hole tunnel body and ground subsidence can be controlled. The overlapped tunnel shield construction method is of great reference value and practical significance to similar shield tunnel engineering and intensive deep-layer underground space exploitation and utilization.
Owner:中铁十八局集团第五工程有限公司 +1
Deformation estimation method for deep foundation pit support structure in soft soil strata
ActiveCN107025333AFacilitate engineering decisionsAccurate dataGeometric CADDesign optimisation/simulationEstimation methodsGaussian function
The invention provides a deformation estimation method for a deep foundation pit support structure in soft soil strata. The method comprises steps as follows: firstly, according to fitting analysis for a measured curve of support structure deformation caused by excavation of a large quantity of deep foundation pits in the soft soil strata, a concept of strata loss theory is introduced, and a deformation calculation model for the deep foundation pit support structure in the soft soil strata is constructed; by reference to thoughts of a shield tunnel surface subsidence Peck formula, a Schmidt formula and a triangular subsidence formula, an area of a support structure deformation enveloping curve can be obtained through an area of an enveloping curve of surface subsidence behind a wall, and an area B of the enveloping curve of surface subsidence behind the wall is calculated; a deformation estimation calculation formula for the deep foundation pit support structure in the soft soil strata is derived out according to the former formulae; finally, values of parameters are substituted into the deformation estimation calculation formula for the deep foundation pit support structure in the soft soil strata, and a deformation value of any point of the support structure can be calculated. A fitting curve of deformation of the support structure is highly fitted with a measured result curve by adopting a Gaussian function, and the effect is good.
Owner:广西建工第五建筑工程集团有限公司
Coal mine strip mining and coal pillar filling and replacement method
InactiveCN107829736APromote recoveryMaintain stabilityUnderground miningSurface miningGround subsidenceEngineering
The invention relates to a coal mine strip mining and coal pillar filling and replacement method, wherein the method includes first-stage mining of mining of a strip working face and filling of a strip goaf area, and second-stage mining of replacement of the strip coal pillar and filling of the strip coal pillar goaf area. With the method of strip mining and coal pillar replacement, the mine recovery rate can be greatly increased to 60%-70%, and the ground subsidence amount of the mining area is greatly reduced, and the stability of an aquifer structure is maintained, so as to achieve the purposes of water conservation and coal mining.
Owner:XIAN UNIV OF SCI & TECH +1
METHOD OF SORTING AND UTILIZING COAL AND ROCK FOR COAL AND ROCK Combined MINING FACE
ActiveUS20180229245A1Low costQuality improvementMining devicesUnderground miningGround subsidenceSocial benefits
The present invention relates to a method for sorting and utilizing coal and rock for a coal and rock combined mining face, and is especially applicable to the sorting and utilization of coal and rock mined from a coal and rock combined mining face when an extremely thin coal seam is used as a protective layer in combined mining of multiple coal seams. Underground gangue transport, storage and filling systems are directly established underground to convey a large amount of coal and gangue mined from the coal and rock mining face to an underground sorting and washing chamber for efficient separation of the coal and the gangue, sorted gangue is crushed and then filled in a mined-out area of a protected layer, thus realizing the environment-friendly cut and fill mining of the protective layer while the gangue is not lifted, and effectively preventing the ground subsidence caused by combined mining of multiple coal seams; sorted middlings are conveyed to a gangue power plant on the ground for power generation through a main conveying system, so that the pressure on mine coal quality is alleviated when benefits are created in the power plant, and thus the average ash content of commercial coal is reduced, and the selling price is increased. The method provided by the invention realizes the efficient utilization of coal and rock while realizing the efficient separation of coal and gangue, and has remarkable economic and social benefits and excellent promotional value.
Owner:CHINA UNIV OF MINING & TECH
Slack cable arrangement for underground electric service conduit connected to service boxes on the sides of buildings
ActiveUS20060005983A1Convenient paymentHigh strengthElectrically conductive connectionsCable installations in cable chambersGround subsidenceTelecommunications
A slack chamber in a form which will extendably retain a loop of service cable ready to pay out slack in the event of ground subsidence is provided buried either in line with an underground cable run or partially buried in line with the service line from the building service downwardly to an underground service line.
Owner:RIZZUTO JR SALVATORE A
Internet-based subway tunnel construction safety monitoring system
InactiveCN108999612AReflect work statusReduce detection frequencyTunnelsGround subsidenceDeformation monitoring
The invention belongs to the building technological field and discloses an internet-based subway tunnel construction safety monitoring system. The internet-based subway tunnel construction safety monitoring system comprises a ground subsidence monitoring module, a ground building sinking and tilt monitoring module, an underground pipeline monitoring module, a pile foundation underpinning monitoring module, a communication channel and pump house construction monitoring module, an in-ground vertical displacement and horizontal displacement monitoring module, a groundwater water level monitoringmodule, a rock-soil and tunnel structure interaction monitoring module, and a pipe segment deformation monitoring module. The internet-based subway tunnel construction safety monitoring system provided by the technical schemes of the invention aims at safety detection. According to the internet-based subway tunnel construction safety monitoring system, monitoring objects are determined according to different engineering items; programs are designed according to the main indicators for the safety and stability of the monitoring objects; and the arrangement of monitoring points can fully reflectthe working states of the monitoring objects. With the internet-based subway tunnel construction safety monitoring system of the invention adopted, monitoring performance and precision can be satisfied, detection frequency can be reduced, detection components can be reduced, and monitoring costs can be decreased.
Owner:NANCHANG INST OF TECH
Circular section synchronous rotary jet grouting device
InactiveCN103835730AAvoid deformationReduce frictionUnderground chambersTunnel liningGround subsidenceSprayer
A circular section synchronous rotary spray grouting device comprises a steel pipe section, a grouting pipe and a plurality of sprayers. Two ends of the steel pipe section are connected with tool pipes. The grouting pipe is used for conveying grout. The sprayers are driven to rotate by a plurality of motors and used for grouting between the steel pipe section of a soil body. A peripheral annular groove and a conveying hole communicating with the grouting pipe are formed in the wall of the steel pipe section. A rotary ring is embedded in to the annular groove through slide support blocks on two sides and can rotate. A peripheral grout storage groove communicated with the conveying hole of the steel pipe section and a plurality of grout conveying holes communicated with the peripheral grout storage groove and axially penetrating the rotary ring are formed in the inner wall of the rotary ring. The sprayers are fixedly connected to the outer wall of the rotary ring and rotates along with the rotary ring. Each sprayer is provided with a grouting hole communicated with the corresponding grout conveying holes. The circular section synchronous rotary spray grouting device has the advantages that timely grouting of the periphery of a pipe push bench can be achieved, even grout sleeves can be formed fast, friction between tunnel tube pieces and the soil body is lowered, soil body deformation is prevented, ground subsidence is controlled, and post tunnel deformation is reduced.
Owner:上海盾构设计试验研究中心有限公司 +2
Pipe-jacking construction method
PendingCN109707383ATimely correctionChange in timePipe laying and repairUnderground chambersGround subsidenceState of art
The invention provides a pipe-jacking construction method. Thepipe-jacking construction method comprises the steps that pipe-jacking construction measuring is performed and comprises the steps that alaser tester is used for detecting the jacking position and angle of a machine head of a pipe jacking machine, the detected result is compared with the expected effect, and a controller controls the heading direction and position of the machine head of the pipe jacking machine; after the jacking work is finished, slurry is replaced, an injection and installation hole is formed in a soil body of the outer wall of a steel pipe, a third slurry injecting pipeline is installed on the injection and installation hole, and the third slurry injecting pipeline is used for replacing thixotropic slurry onthe outer wall of the steel pipe by introducing cement mortar or fly ash cement mortar to improve the structural strength of the soil body at the steel pipe to prevent ground subsidence; and after the slurry replacement is completed, the third slurry injecting pipeline is removed and the injection and installation hole is subjected to injection and installation and blocking, and a sealing plate is disposed on the outer side of the injection and installation hole for sealing. The pipe-jacking construction method solves the technical problem that the construction effect of a pipe-jacking construction method in the prior art is poor.
Owner:CHINA RAILWAY SHISIJU GROUP CORP
Method for analyzing relationship between deformation of foundation pit and ground subsidence outside of foundation pit
The invention discloses a method for analyzing a relationship between deformation of a foundation pit and ground subsidence outside of the foundation pit. The method is characterized by confirming a relational expression between the deformation and soil body subsidence outside of the foundation pit according to three basic deformation features of a foundation pitenclosing structure, and including decomposing an enclosing structure deformation mode, collecting soil body subsidence volumes outside of the foundation pit on site, building an inversion expression, processing data by using a diagonal cross least square method, fitting subsidence data by using a difference evolutionary algorithm (DE), reasonably selecting a zoom factor F and a crossover probability Cr of the DE, generating and evaluating simulated data and the like. The method for analyzing the relationship between the deformation of the foundation pit and the ground subsidence outside of the foundation pit obtains optimal values of the zoom factor F and the crossover probability Cr by analyzing influences of the zoom factor F and the crossover probability Cr in an algorithm, and uses the diagonal cross least square method as a difference selection function for inversion calculation. The method for analyzing the relationship between the deformation of the foundation pit and the ground subsidence outside of the foundation pit aims at obtaining maintaining deformation conditions by monitoring the soil body subsidence outside of the foundation pit and forecasting deformation in future phases, and can be widely used in prediction studies available for the corresponding relationship between the ground subsidence outside of the foundation pit and enclosing deformation.
Owner:LIAONING TECHNICAL UNIVERSITY
Construction method for controlling peripheral ground subsidence in foundation pit construction
InactiveCN101701460AGuarantee the construction qualityEffective control of settlementExcavationsBulkheads/pilesGround subsidenceSlurry wall
The invention discloses a construction method for controlling peripheral ground subsidence in foundation pit construction and belongs to the technical field of construction works. The construction method comprises the following steps of: drilling holes and taking soil on site for dividing soil layers; determining a top plate and the high level of a bottom plate of each layer of soil; determining depth Dw of the bottom plate of a first layer of confined aquifer and determining distribution and type of underground water; taking soil samples of all soil layers, and determining c values, j values and saturated unit weight g of all the soil samples; leveling a construction site and reinforcing in a way of high-pressure jet grouting; determining an embedding depth of a diaphragm wall; trenching in a foundation to reach the embedding depth of the diaphragm wall in the step 3, and then getting rid of sludge; putting steel reinforcement cages and pouring concrete in the trenches, and connecting all sections of trenches by joints to obtain a reinforced concrete diaphragm wall. The method is simple and can ensure the construction quality of diaphragm walls and can effectively control the peripheral ground subsidence.
Owner:SHANGHAI JIAO TONG UNIV
Heat storage type thawing device
The heat accumulating snow thawing apparatus utilizes solar energy accumulated in summer to thaw snow in roof and road without fuel consumption and ground subsidence. Heat exchanger with internal circulating liquid is buried underground reach rock bed for heat exchange with rock bed, and snow thawing plates are set in where sun shines at least in summer, and circulating pipeline with pump, switching valve and accumulator is set in between. In summer, solar energy is acquired with the snow thawing plates and stored in the rock bed. In winter, the valve is switched for providing the accumulated heat from the rock bed to the snow thawing plates to thaw snow in roof and road.
Owner:ミサワ環境技術
Construction method of water-stop curtain for sub-storey on the ground
ActiveCN102296621ASettlement controlWill not affect the waterproof effectBulkheads/pilesGround subsidenceSleeve valve
The invention discloses a construction method of a ground sectional water-stop curtain, which comprises the steps of: obtaining ground water occurrence information and stratum structure information in a trunk region to be constructed and tunneled; positioning a position of a high-pressure fuel pipeline in the trunk region to be constructed and tunneled; carrying out high-pressure jet grouting on a continuous multi-chamber water-stop curtain on the top in the trunk region to be constructed and tunneled, distributing the multi-chamber water-stop curtain at two sides of a tunnel excavation contour line; reinforcing and closing a cross gap region in a space range of the high-pressure jet grouting water-stop curtain and an intermediate-pressure fuel pipeline; and forming a ground sleeve valve grouting vault reinforcing ring above a tunnel to be constructed and tunneled. By adopting the construction method of the ground sectional water-stop curtain in the embodiment of the invention, better conditions are created for the tunneling, the construction progress is accelerated, the construction risk and engineering input are reduced, the ground subsidence is effectively controlled, and the safety of a building close to an underground pipeline is ensured.
Owner:SHENZHEN MUNICIPAL DESIGN & RES INST
Shield knife replacing diaphragm wall reinforcing structure and reinforcing construction method
PendingCN108425682ADoes not affect normal constructionFinish quicklyTunnelsBulkheads/pilesGround subsidenceEngineering
The invention relates to the technical field of tunnel and underground engineering construction, in particular to a shield knife replacing diaphragm wall reinforcing structure and a reinforcing construction method. The shield knife replacing diaphragm wall reinforcing structure includes a diaphragm wall arranged on a shield excavation route. The diaphragm wall is a plain concrete diaphragm wall. The diaphragm wall is disposed at the length portion position of knife replacement after the tunneling of a shield tunneling machine; by arranging the reinforcing structure on the shield excavation route in advance, knife replacement is performed when the shield excavation is performed to the reinforcing structure; due to the arrangement of the reinforcing structure, normal pressure knife replacement can be performed on a knife, so that the shield knife replacing diaphragm wall reinforcing structure has the advantages of being simple, convenient, fast and low in cost and the like during normalpressure knife replacement; at the same time, after the reinforcing structure is arranged, the problems of excavation face collapse and ground subsidence and the like during knife replacement are solved, the surrounding along the line of a tunnel is ensured, and quality safety accidents are effectively avoided.
Owner:CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP 2ND ENG CO LTD +1
Monitoring and evaluating method for ground subsidence
The invention discloses a monitoring and evaluating method for ground subsidence. The monitoring and evaluating method includes the following steps that the region with ground subsidence is comprehensively investigated, and an arrangement scheme of displacement monitoring datum points and displacement deformation monitoring points is determined according to an investigation result; with a set monitoring period, the displacement deformation monitoring points are monitored, and a monitoring time sequence for ground subsidence is established for each monitoring point; fractal index parameters for ground subsidence are determined and include an accumulated deviation, a range and a standard deviation; according to the parameters, a fractal index for ground subsidence is determined; according to ground subsidence and stability monitoring judgment rules, ground stability is evaluated, and a subsidence risk is predicted; according to the fractal index for ground subsidence, the evolution of the ground subsidence index is determined, and the ground long-term stability is evaluated. The ground subsidence stability monitoring judgment rule is established to evaluate the ground subsidence stability and subsidence risk; the ground long-term stability and the evolution trend of the stability are evaluated in real time, and the ground subsidence and long-term stability can be determined and evaluated.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY
Robust ground subsidence monitoring method based on radar distributed target
PendingCN110763187AAccurate predictionScene recognitionHeight/levelling measurementGround subsidencePrediction algorithms
The invention discloses a robust ground subsidence monitoring method based on a radar distributed target. The method comprises a step of obtaining an SAR time sequence image, identifying DS candidatepoints, constructing a covariance matrix, estimating an optimal phase value of the covariance matrix, determining a final DS point target, obtaining a PS point target, and determining a final deformation rate and a time sequence deformation sequence, calculating and selecting an appropriate DS point target through a KS test method, establishing the covariance matrix to count interference phase andcoherence coefficient information, extracting a same distribution target and estimating related parameters, a step of estimating an optimal phase by extracting the phase of a feature vector corresponding to a maximum feature value from the established covariance matrix, a step of detecting the overall fitting degree of a regression equation according to the goodness of fit, wherein the overall fitting degree is used for determining the final DS point target, and a step of finally, performing sequential InSAR processing in combination with the PS point target. The ground subsidence can be better and accurately predicted, and the algorithm is stable and reliable.
Owner:INST OF GEODESY & GEOPHYSICS CHINESE ACADEMY OF SCI
Experiment device for ground subsidence induced by underground water leakage and use method of experiment device
InactiveCN107238693AOriginalOptimizing the Construction Scheme of Underground EngineeringEarth material testingGround subsidenceWater leakage
The invention discloses an experiment device for ground subsidence induced by underground water leakage and a use method of the experiment device, and belongs to the technical field of geological hazard monitoring and warning. The experiment device comprises a soil tank, a water tank located below the soil tank and a collapse cylinder for connecting the water tank with the soil tank, wherein the upper end of the collapse cylinder extends into the soil tank, so that an inner cavity of the collapse cylinder is communicated with an inner cavity of the soil tank, a soil filter screen is arranged at one end, stretching into the soil tank, of the collapse cylinder, the lower end of the collapse cylinder stretches into the water tank to enable the inner cavity of the collapse cylinder to be communicated with an inner cavity of the water tank, and a negative pressure test sensor for testing pressure of the inner cavity of the collapse cylinder is arranged at one end, stretching into the water tank, of the collapse cylinder; a valve is arranged on the side wall of the water tank, and a water pump is connected with the side wall of the water tank to be used for testing water pressure in the water tank; a ground subsidence monitor for monitoring ground subsidence is mounted in the soil tank. The experiment device provides a scientific basis for effectively monitoring ground subsidence disaster and optimizing underground construction plans.
Owner:CHONGQING VOCATIONAL INST OF ENG
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