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66results about How to "Shorten the consolidation time" patented technology
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Curing agent capable of rapidly curing sludge at room temperature and use method thereof
The invention discloses a curing agent capable of rapidly curing sludge at room temperature and a use method thereof. The curing agent is prepared from, by weight, 48%-70% of inorganic micro powder, 28%-50% of emulsion, 0.05%-1.8% of high-performance water-absorbent resin and 0.05%-0.5% of triethanolamine. The emulsion can react with the inorganic micro powder and activated silicon dioxide and aluminum oxide in the sludge to form a zeolite-like crystalline substance of a silicon (aluminum)-oxygen tetrahedron structure. The sludge curing agent is capable of improving the curing strength of the sludge and shortening the curing time, small in air shrinkage and good in water resistance, and dosing of materials can be particularly adjusted according to components of the sludge, so that curing of the sludge is not limited by time, the strength, the stability and the like meet the actual engineering requirements, the cost is low, pollution does not exist, and the curing agent can be widely applied and promoted.
Owner:GUANGZHOU INSTITUTE OF BUILDING SCIENCE CO LTD
Compound vacuum precompressed soft foundation comprehensive strengthening method
InactiveCN101139833AShorten preload timeIncrease tamping energySoil preservationSoil horizonPre stressing
The invention discloses a composite vacuum pre-stressed soft foundation comprehensive reinforcement method, which is characterized in that the construction method comprises a vacuum pre-stressed precipitation and an electroosmotic precipitation. The execution steps are as follows: a) Establish a yard drainage system; b) Perform vacuum pre-stressed precipitation; c) Perform electroosmotic precipitation at the same time of step b), or when water output is lowered in step b; d) When degree of consolidation reaches a level higher than or equal to 85 percent, steps b) and c) are over to enter a low-energy forced ramming; e) Perform vibration steamroll to flatten the yard. Through composition of utilization of the two construction methods of the vacuum pre-stressed and electroosmotic precipitations, the invention retains advantages in prior vacuum pre-stressed construction methods. Meanwhile, in combination with the electroosmotic precipitation, the invention fulfills application of the vacuum pre-stressed construction method in sludge-like (low permeation factor) soft earth foundations, so that the reinforcement depth of the soft earth layer can be increased, but construction period can be shortened.
Owner:朱怡 +1
Vacuum prepressing-overloading-dynamic compaction combined consolidometer
ActiveCN103823039AShorten the consolidation timeImprove consolidation efficiencyEarth material testingGeotechnical engineeringDynamic compaction
The invention belongs to the technical field of geotechnical engineering and in particular relates to experiment equipment for reinforcing soft soil by combining vacuum prepressing and overloading. At present, the combined reinforcing method mainly depends on the experience of a technicist, so that accurate design calculation parameters are absent. The invention aims to design an indoor device for simulating vacuum prepressing and overloading combined soil sample solidification; therefore, the design accuracy and the reinforcement efficiency of the combined reinforcement method can be greatly improved.
Owner:WENZHOU UNIVERSITY
Method for reinforcing composite vacuum prepressing soft soil foundation
The composite vacuum pre-pressing soft foundation stabilizing process with vacuum pressing precipitation and electroosmosis precipitation includes the following steps: 1. establishing a site draining system, arranging a vacuum electroosmosis device, and setting a vacuum pressing sealing layer on the ground; 2. turning on the vacuum pump for vacuum pressing precipitation; 3. activating the circuit for vacuum electroosmosis precipitation; and 4. turning off the vacuum electroosmosis device and the vacuum pump after reaching the consolidation degree of 85 % and performing the post ground treatment and further stabilizing. The present invention combines vacuum pressing precipitation and electroosmosis precipitation to reach high consolidation degree of the soft foundation and shorten the construction period.
Owner:郁玫 +1
Electro-osmotic consolidation method of large triaxial test of gravel admixture
ActiveCN101666722ASolve the problem of electric corrosionDrainagePreparing sample for investigationStrength propertiesTriaxial shear testEngineering
The invention discloses an electro-osmotic consolidation method of a large triaxial test of gravel admixture. The two ends of a sample in a large triaxial apparatus are respectively provided with an electrokinetic geosynthetics electrode and are connected with an external power through wires, and the sample generates electro-osmotic consolidation under the action of an electric field. The method of the invention can greatly shorten the consolidation time of the sample of the large triaxial test, improve work efficiency, and simultaneously ensure even sample consolidation. In the invention, electrodes, wires and power supply are only arranged on the triaxial apparatus additionally, and the method is low in application cost, convenient in operation, and quick and effective in consolidation of gravel admixture in the large triaxial test.
Owner:HOHAI UNIV
High-concentration wet filling mold bag treatment method and system for municipal solid waste incineration fly ash
ActiveCN107150060AImprove storage capacity utilizationReduce disposal costsSolid waste disposalFurniture waste recoveryDetoxicationHigh concentration
The invention discloses a high-concentration wet filling mold bag treatment method for municipal solid waste incineration fly ash. Fly ash homogenization, heavy metal stabilization, dioxin detoxication, rapid hydration consolidation and landfill integration treatment are achieved through the three links of fly ash thick paste or cream preparing, high-pressure pumping or filling and mold bag water segregation or hydration consolidation, no dust pollution or wastewater discharge or ammonia smell dissipation is generated in the treatment process, discharge of fly ash landfill leachate can be greatly reduced, and meanwhile municipal and industrial sludge, silt, river sediment and the like can be collaboratively treated; the consolidated fly ash in a mold bag meets the relevant national standard requirements, and landfill treatment can be conducted on the consolidated mold bag. The invention further discloses a high-concentration wet filling mold bag treatment system for the municipal solid waste incineration fly ash. Accordingly, the defects in large-scale industrial application of traditional dry landfill for the fly ash and a low-concentration slurry filling mold bag treatment method for the fly ash can be avoided, environment-friendly, economic and safe fly ash treatment is achieved, solid waste such as sludge is collaboratively and safely treated, and the method and system can be applied to large-scale industrial production.
Owner:TIANJIN YIMING ENVIRONMENTAL TECH CO LTD
Reinforcing method of vacuum preloading lead pipe pile gas injection carbonized super-soft foundation
ActiveCN110512591AImprove compactionImprove displacement effectSoil preservationSites treatmentResource utilization
The invention discloses a reinforcing method of a vacuum preloading lead pipe pile gas injection carbonized super-soft foundation, and belongs to the technical field of super-soft foundation reinforcing treatment of geotechnical engineering. The reinforcing method comprises the steps of site treatment and exploration, first pile group construction and beating, spraying mixing equipment placement and debugging, curing agent spraying and mixing, first treatment system layout, vacuum preloading-gas injection carbonized treatment, first site treatment completing, continuous construction, final treatment and the like. The reinforcing method has the advantageous of a vacuum preloading method, a magnesium oxide carbonization curing method and a pipe pile composite foundation, the drainage efficiency and the infiltration diffusion efficiency of carbon dioxide are greatly improved through coordination work of vacuum preloading and pipe pile gas injection, the compacting displacement action of apipe pile on soft soil is fully utilized, mud soil is effectively glued through hydration products and carbonization products, thus the intensity of the soft soil composite foundation is enhanced, and the stability is improved. The reinforcing method has the characteristics that the treatment effect is good, the period is short, and low-carbon and environmentally-friendly and economic efficiencyare achieved, and resource utilization of industrial waste in soft foundation treatment is achieved.
Owner:NANJING FORESTRY UNIV
Drainage consolidation system and method for soft soil foundation
PendingCN108691310AProcess Safety for Drain ConsolidationImprove drainage capacitySoil preservationSiphonWater filter
The invention relates to the field of building construction, in particular to a drainage consolidation system and method for a soft soil foundation. A plastic drainage plate is vertically arranged inthe foundation; a horizontal drainage pipe is horizontally arranged and connected with the upper end of the plastic drainage plate; the horizontal drainage pipe is further connected with a vacuum pump, and the vacuum pump is further connected with a drainage trough through a pipeline; the horizontal drainage pipe is embedded through a sand cushion layer; a sealing film is further laid on the sandcushion layer; a pile carrier is arranged above the sealing film, and a water filter pipe is arranged between the sealing film and the pile carrier; one end of a siphon is connected with the water filter pipe; and the other end of the siphon is connected with the drainage trough. By means of the drainage consolidation system for the soft soil foundation, the drainage effect of the foundation is improved, so that the drainage consolidation construction has a better effect and higher efficiency; and with application of the drainage consolidation method for the soft soil foundation, the system iscreated more methodically, and the drainage consolidation process of the soft soil foundation is safer, more efficient and environmentally friendly.
Owner:CHINA HUADIAN ENG
Technique for quickly reinforcing soft soil foundation
InactiveCN1837499AImprove bearing capacityImprove stabilitySoil preservationWater dischargeEngineering
The invention relates to a soft ground quick solidifying method, which comprises following steps: 1, vacuum pre-compress discharging water and solidifying the soft ground for 30 days to reach more than 70% of solidify degree;, b, removing the vacuum pre-compress sealing film, to process power solidifying treatment as compressing, etc. the invention combines the vacuum pre-compress water discharge solidifying method and the power solidify method, to improve the efficiency, reduce the cost and time as 1 / 3-3 / 2 reduced time of before. It can be used in non-sand ventilating layer of soft ground and the sand-interlayer ventilating layer.
Owner:CCCC FOURTH HARBOR ENG CO LTD +2
Heating consolidation construction method for arranging electric heating rod in vertical drainage filter tube
PendingCN107740403ADoes not affect drainageWith electric heating functionSoil preservationHeat sealerElectric cables
The invention discloses a heating consolidation construction method for arranging a built-in electric heating rod in a vertical drainage filter tube. The vertical drainage filter tube is sleeved witha sleeve firstly, the bottom end of the vertical drainage filter tube is ironed level through a heat sealing machine, so that weak soil is prevented from entering the filter pipe; through a plate inserting machine or manual work, the sleeve is beaten to an appointed depth, the sleeve is then pulled out, the vertical drainage filter pipe is kept in a soil body, the vertical drainage filter pipe iscut off, and a sand cushion is exposed at the top end of the vertical drainage filter pipe; an electric heating rod is inserted into the vertical drainage filtering pipe, the electric heating rod is connected through a lead wire of an insulated waterproof rapid plug, the insulated waterproof rapid plug is connected with a rapid connector of a T cable, and the T cable is connected with a power supply system; a foundation is heated through the electric heating rod, through pile preloading or vacuum preloading or vacuum and pile combined preloading or other methods, preloading drainage consolidation is conducted on the foundation.
Owner:TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG +2
Heating and consolidation system for combined vacuum preloading and sealed and drying type solar water heater and construction method
PendingCN110195429AShorten the consolidation timeIncrease the final settlementSoil preservationHollow coreSolar water
The invention discloses a heating and consolidation system for a combined vacuum preloading and sealed and drying type solar water heater and a construction method. The system comprises a plurality ofhollow core plate plastic water drainage plates, a circulating water pipe, a circulating pump, a vacuum filter pipe, a vacuum preloading jet pump, small cofferdams, pressed film ditches, a sealing film and a transparent film. According to the heating and consolidation system disclosed by the invention, by utilizing solar energy, water-on-film of the sealing film subjected to vacuum preloading isheated, and hot water circularly flows in the hollow core plate plastic water drainage plates through the circulating pump, so that the heating cost is reduced, application of the heating condensationmethod in the field of soft soil foundation treatment is promoted, the consolidation time of soft soil can be shortened, and the final settlement amount of the ground foundation is increased.
Owner:TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG +2
Construction method of soft soil roadbed
ActiveCN110093823AIncrease coefficient of frictionReduce settlementRoadwaysClimate change adaptationEngineeringUltimate tensile strength
The invention relates to the field of road construction, in particular to a construction method of a soft soil roadbed. The construction method of the soft soil roadbed comprises the following steps of (1) clearing ground garbage, leveling the ground, and forming the roadbed; (2) line discharging positioning, press fitting and pile fixing of a prestressed pipe pile; (3) excavating the roadbed to atarget depth, carrying out backfilling by using a filler, and rolling and compacting; (4) paving a sand cushion layer; (5) pouring an asphalt layer; (6) compacting the roadbed: rolling two sides of the roadbed by using a road roller, and then rolling the middle position of the roadbed; and (7) drainage protection treatment: excavating drainage grooves in two sides of the roadbed. The soft soil roadbed construction method has the advantages of being good in stability, capable of reducing settling volume, high in strength and good in drainage effects.
Owner:福建星原建设工程发展有限公司
Drainage consolidation construction method combining hot water pipe and plastic drainage plate
InactiveCN110939121AGive full play to the heating functionReasonable designSoil preservationWater pipeWater resource management
The invention discloses a drainage consolidation construction method combining a hot water pipe and a plastic drainage plate. The method is reasonable in design. The heating function of the hot waterpipe and the drainage function of the drainage plate are fully exerted. The hot water pipe is utilized to raise the temperature of a smearing region soil body around the plastic drainage plate, accelerate the consolidation drainage rate, and shorten the consolidation time. Meanwhile, the initial consolidation pressure of soil can be reduced, and the settlement amount during foundation treatment can be increased.
Owner:TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG +2
High-polymer gravel permeable rigid pile and its construction technique
InactiveCN108035344AImprove the bearing capacity of single pileShorten the consolidation timeBulkheads/pilesEngineeringHigh polymer
The invention discloses a high-polymer gravel permeable rigid pile and its construction technique. The construction technique includes steps of stirring certain graded gravel grains with a high-molecular polymer at a certain ratio according to the design requirement; after stirring evenly, pouring in a pile hole; gluing the gravel grains to be a whole body by means of the high-molecular polymer.;through proper compaction and vibration, forming a rigid pile while reserving a part of gap between the gravel grains; forming a vesicular structure and arranging reverse filter layers at the outsideand the bottom part of the pile body. The high-polymer gravel permeable rigid pile is simple in construction technique, controllable in quality, short in construction term and low in cost.
Owner:HOHAI UNIV
Experimental device for inclined angle-adjustable seabed slope seismic response research model based on permeating solidifying method
ActiveCN108956954AShorten the consolidation timeGuaranteed uniformityEarth material testingSlope angleSurface ocean
The invention discloses an experimental device for an inclined angle-adjustable seabed slope seismic response research model based on a permeating solidifying method and belongs to the research fieldsof earthquake, rock soil, geology, environment, and the like. The experimental device comprises an inclined angle-adjustable model box system and a permeating loading solidifying system. The experimental device is suitable for the model test research on saturated soil slope and is especially suitable for the related experiment for the related ocean soft clay slope; in order to overcome the defectthat the traditional solidifying method can hardly practically simulate the natural deposition state of soil, a permeating solidifying method is combined for solidifying the soil in the model box, sothat the soil parameters linearly change along the depth direction and the simulated natural deposition state is more close to the true natural deposition state of the seabed soil; and meanwhile, thetraditional model box is improved, a hoisting device is adopted for realizing the random adjustment for the model slope angle within a certain scope according to requirements, and the problem of soildisturbance caused by the slope preparation according to a slope-cutting method in the traditional model test is solved.
Owner:DALIAN UNIV OF TECH
Foundation reinforcement treatment method
InactiveCN112112151AImprove reinforcement qualityImprove reinforcement effectIn situ soil foundationSoil preservationStructural engineeringDrill hole
The invention belongs to the technical field of project construction, and discloses a foundation reinforcement treatment method. The foundation reinforcement treatment method comprises the following steps of surveying a peripheral area of a foundation, and determining whether the foundation reinforcement property is ground reinforcement or underground reinforcement; determining a foundation weak area, and removing the foundation weak area; performing prepressing treatment on the geotechnical engineering foundation by a vacuum prepressing construction method; tamping the foundation by using a rammer, and compressing soil layer pores of the foundation in a rock-soil area; determining a reinforcement method; and performing hole drilling by a pile machine, inserting a grouting pipe with a nozzle into a preset position of a soil layer, and performing foundation reinforcement by a high-pressure jet grouting method. The foundation reinforcement treatment method provided by the invention has the advantages that the vacuum prepressing treatment method is reasonably used; pore water in the rock-soil body of the foundation is enabled to be rapidly discharged; the solidification time of the soil body is obviously shortened; the foundation reinforcement quality is enhanced; through the high-pressure jet grouting treatment, the bearing capacity of the geotechnical engineering foundation is enabled to be obviously improved; and the foundation reinforcing effect is better.
Owner:中化学华晋工程有限公司
Vertical and transverse drainage system and construction method
The invention relates to a vertical and transverse drainage system. The vertical and transverse drainage system comprises a vertical and transverse drainage barrel. The vertical and transverse drainage barrel is composed of a vertical drainage column and transverse plastic drainage belts, wherein the drainage column is a main drainage channel and transmits absorbed water to an upper cushion layer, and the plastic drainage belts are auxiliary drainage channels and transmit the absorbed water to the vertical drainage column. The plastic drainage belts are fixed to the flange face of a core column of the drainage column through high-strength glue and are wound around the periphery of the drainage column, the tail ends of the plastic drainage belts are bonded through low-strength glue, only one plastic drainage belt is bonded to one fracture surface, and the plastic drainage belts are spirally bonded to the periphery of the drainage column at equal intervals. The vertical and transverse drainage system overcomes the defects that in a traditional drainage solidification method, the arrangement of a drainage channel is single, and the drainage path is long, and the vertical and transverse drainage system and a construction beating method thereof are developed and can be directly used in the existing drainage solidification method for treating the soft soil foundation project.
Owner:NINGBO UNIV
Tunnel top cavity supporting method
ActiveCN114673528AReduce adverse effectsOptimize the force structureUnderground chambersHydro energy generationRebarCave
The invention discloses a method and a structure for supporting a cavity at the top of a tunnel, relates to the field of geotechnical engineering, and aims to support an unstable cavity at the top of the tunnel after the tunnel is broken so as to safely and quickly pass through a soft and broken surrounding cavern section. According to the technical scheme, the tunnel top cavity supporting method comprises the steps that in the blasting excavation period of a soft broken surrounding rock cave section, an unstable cavity appears at the position, close to the tunnel face, of the top of a tunnel, and steel arch pieces, arch piece supports, arch feet and arch foot fixing pieces are manufactured for standby application; then bottom foot scum of the tunnel is removed, arch feet are erected on the two side walls of the tunnel respectively, and arch piece supports and steel arch pieces are fixedly installed on the arch feet respectively; slag is discharged, and the steel arch pieces of the remaining tunnel sections are installed till the tunnel face is reached; steel bars are hung on the inner sides of the arch feet, concrete is sprayed, and a structural layer is formed; and finally, the unstable cavity is backfilled through the backfilling holes. The method is used for treating the unstable cavity appearing at the top of the tunnel, close to the tunnel face, of the soft and broken surrounding cavern section.
Owner:CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
Visualized test sample box for indoor geotechnical experiment
PendingCN108535093AEasy to useImprove experimental efficiencyMaterial strength using tensile/compressive forcesMaterial strength using steady shearing forcesTest sampleDirect shear test
The invention discloses a visualized test sample box for an indoor geotechnical experiment. The box comprises an upper box body (1), a lower box body (2), positioning pins (3) and a top cover (4); a cylindrical concave groove (21) is formed in the middle of the lower box body (2), the edge of the lower box body (2) is provided with lower box limiting holes (22), an upper box through hole (11) is formed in the middle of the upper box body (1), and the edge of the upper box body (1) is provided with upper box limiting through holes (12); the lower box limiting holes (22) are detachably connectedwith the upper box limiting through holes (12) through the positioning pins (3); the upper box body ( 1) and the lower box body (2) are both made of transparent materials. The visualized test samplebox can be used for sample testing of the indoor geotechnical direct-shear experiment and can also be suitable for sample testing of a one-dimensional consolidation experiment, and the test experimentresult is accurate and reliable; the movement state of soil under the shearing function or the compression function can be directly observed by naked eyes or digital photographing equipment, and thestructural change and displacement of the soil can be observed.
Owner:INNER MONGOLIA UNIVERSITY
Construction device and method for multifunctional pipe pile for drainage of land reclamation and island building
ActiveCN108396728AReduce dosageSave the cost of fillingBulkheads/pilesSoil preservationOcean bottomSpray nozzle
The invention discloses a construction device and method for a multifunctional pipe pile for drainage of land reclamation and island building. Holes are formed in the side surfaces of pile bodies of aprefabricated pipe pile, the pipe pile is wrapped with geotextile, an upper piston is driven by expansion and shrinkage of a hydraulic liner to lift and drop vertically along guide columns, and hingeassemblies are driven to bend; the guide columns and the hinge assemblies are arranged between the upper piston and a lower piston, and the hinge assemblies are mounted on the guide columns; slurry enters upper spherical hinges through grouting ports, passes through upper linkage pipes, enters middle spherical hinges and is sprayed out by spray nozzles; the prefabricated pipe pile is partially embedded into submarine soil mass, layered placement for drainage is performed repeatedly in a sandy soil and soft soil layered alternate manner, grouting is performed after solidification, and different outwards grouting angles of a grouting fluid from the side wall holes of the pile correspond to different functions. The construction device and method have the advantages that bearing capacity, pull resistance and lateral resistance of a pile foundation are improved, and the bearing capacity of the pile foundation is improved effectively; expenditures are reduced, construction efficiency is increased, the requirement for fast island forming is met, and differential settlement of filled soil layers is controlled effectively.
Owner:ZHEJIANG UNIV
Plastic drainage board externally wound with heating wires and consolidation drainage construction method of plastic drainage board
The invention discloses a plastic drainage board externally wound with heating wires and a consolidation drainage construction method of the plastic drainage board. The plastic drainage board comprises a plastic drainage board body and the heating wires; the heating wires are arranged on the two sides of the plastic drainage board body and comprise glass fiber bundles, resistance wires and isolated waterproof layers; and the resistance wires are spirally wound on the glass fiber bundles and wrap the isolated waterproof layers on the outer layers of the glass fiber bundles. The plastic drainageboard externally wound with the heating wires is reasonable in design and simple in structure, the heating wires are externally wound on the outer side of the plastic drainage board, on the basis ofnot influencing the drainage function of the plastic drainage board, the plastic drainage board has the heating function at the same time, a heating structure of the plastic drainage board is high inleakproofness and high in waterproofing grade, driving construction of the plastic drainage board and the heating wires is easy, and connecting is convenient.
Owner:TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG +2
Soft foundation treatment construction method
ActiveCN111021332AShorten the consolidation timeEnsure the quality of the boardSoil preservationCushionArchitectural engineering
The invention discloses a soft foundation treatment construction method. The method comprises the steps that S1, a working surface is cleaned, a working cushion layer is laid, and then a gravel cushion layer is laid; S2, the pile position of a plastic drainage plate is measured, and a plate inserting machine enters the field; S3, the plastic drainage plate is installed; S4, the plastic drainage plate is inserted; S5, the plastic drainage plate is cut off, moved and then inserted; and S6, a roadbed is detected, and surface vertical and horizontal displacement is carried out. The method has thefollowing advantages and effects that a soft foundation can be cured through the arrangement of the plastic drainage plate, and meanwhile, the consolidation time of the soft foundation can be greatlyshortened; on the other hand, through the structural design of a prefabricated shoe head and the plastic drainage plate, the retreating distance of the plastic drainage plate can be reduced during plate insertion, sand therefore the quality of plate insertion is ensured.
Owner:CHENGTONG KAISHENG ECOLOGICAL CONSTR CO LTD
Heating-type plastic drainage plate and construction method thereof
PendingCN107794909AReasonable designSimple structureSoil preservationElectric heatingCivil engineering
The invention discloses a heating-type plastic drainage plate and a construction method thereof. The heating-type plastic drainage plate comprises a core plate and a filter membrane, wherein the coreplate is coated with the filter membrane; and an electric heating membrane is packaged in the core plate. The heating-type plastic drainage plate disclosed by the invention is reasonable in design andsimple in structure; the electric heating membrane is packaged in the core plate of the heating-type plastic drainage plate, so that the heating-type plastic drainage plate can have the electric heating function on the basis that the own drainage function of the heating-type plastic drainage plate is not influenced; the heating structure of the heating-type plastic drainage plate is high in sealing performance and waterproof grade; furthermore, the heating-type plastic drainage plate has the advantages that the construction is simple and the connection is convenient; and the temperature of asoil body in a smear zone around the adopted heating-type plastic drainage plate is increased, the consolidation drainage rate is improved, and the consolidation time is shortened.
Owner:TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG +2
Carbon fiber reinforced recycled aggregate concrete
The invention relates to concrete and aims to provide carbon fiber reinforced recycled aggregate concrete with good comprehensive performance and low cost. Each cubic meter of the carbon fiber reinforced recycled aggregate concrete is prepared from 400-520 kg of cement, 630-780 kg of sand, 1,000-1,100 kg of recycled coarse aggregate, 1-7 kg of carbon fibers, 35-42 kg of silica fume, 1.2-2.0 kg of a retarder and 3.5-5 kg of slaked lime, wherein the carbon fibers are preprocessed with a silane coupling agent, and the length of the carbon fibers is 5-25 mm. sufficient combination of the recycled aggregate with a gel material and a reinforcing material is guaranteed, so that the compressive capacity and tension resistance capacity of the concrete are improved remarkably; further, the raw materials are common, a processing technology is simple, and a foundation is laid for wide application of waste concrete recycled aggregate.
Owner:CHONGQING THREE GORGES UNIV
Fast tensioning anchor cable structure and construction method thereof
The invention discloses a fast tensioning anchor cable structure. The fast tensioning anchor cable structure comprises anchor cable steel strands, a primary grouting pipe, a secondary grouting pipe, aguiding member and binding members, wherein the anchor cable steel strands are arranged in drilling holes; the primary grouting pipe extends into the drilling holes and is used for performing primarygrouting on the surrounding rock, 1-3m from openings of the drilling holes, in the drilling holes to form a primary grouting part used for closing the openings of the drilling holes; the secondary grouting pipe extends into the drilling holes and is used for performing secondary grouting on other areas not subjected to primary grouting in the drilling holes; the guiding member is disposed in thedrilling for the anchor cable steel strands to pass through to guide the anchor cable steel strands to enter into the drilling holes; and the binding members are used for binding the anchor cable steel strands disposed in the drilling holes. The gripping force and anchoring force between the steel strands and a grouting body are effectively increased, meanwhile, the consolidation time of the grouting body is greatly reduced, so that the anchor cable construction is completed within 15 hours, and a fast tensioning anchor cable supporting structure is provided for a weak surrounding rock long-span tunnel with short self-stabilization time.
Owner:CHINA RAILWAY ENG CONSULTING GRP CO LTD
Cohesive soil large-scale triaxial sample consolidating apparatus and consolidating method thereof
InactiveCN105158034ASpeed up saturation consolidationShorten the consolidation timePreparing sample for investigationStrength propertiesTested timeRubber membrane
The invention discloses a cohesive soil large-scale triaxial sample consolidating apparatus and a consolidating method thereof. The consolidating apparatus comprises a triaxial sample, a pedestal, a top cover, a rubber gasket, an electrode, a DC power supply, a bottom water penetrating board, a top water penetrating board and a combined insulated board; periphery of the cohesive soil triaxial sample is isometrically provided with electrodes, a central axis of the triaxial sample is provided with electrodes, electrodes arranged at the periphery are connected with the bottom water penetrating board at the bottom of the triaxial sample, the bottom water penetrating board is communicated with a DC power supply '-'by the combined insulated board, the electrode arranged on the central axis is connected with the top water penetrating board, the top water penetrating board is communicated with the DC power supply '+' by the combined insulated board, and the combined insulated board is composed of an insulated board, a spring and a contact. When the apparatus is used, the triaxial sample is prepared on the pedestal, simultaneously electrodes are arranged in the triaxial sample, communication between electrodes and leads are guaranteed, a rubber membrane is bundled, a confining pressure is applied, and the DC power supply is powered on for carrying out the triaxial sample consolidation. The consolidating apparatus has the advantages of simple structure, convenient operation, reliability, safety, substantially shortened consolidating time, and reduced test time and manpower.
Owner:HOHAI UNIV
Environment-friendly recycled concrete
The invention relates to concrete, aims at providing environment-friendly recycled concrete which is excellent in performance and low in cost and aims at solving the problems of waste concrete pollution and natural sand resource shortage. Each cubic meter of environment-friendly recycled concrete comprises 400-520kg of cement, 630-780kg of sand, 1000-1100kg of recycled coarse aggregate, 1-7kg of carbon fiber, 35-42kg of silica fume, 1.2-2.0kg of a retarder and 3.5-5kg of slaked lime, wherein the carbon fiber is pretreated through a silane coupling agent and the length of the carbon fiber is 5-25mm. According to the invention, full combination of the recycled coarse aggregate and a gel material and a reinforcing material is ensured, so that the compression resistance and the tensile ability of the concrete are significantly improved, and the problems of waste concrete pollution and natural sand resource shortage are solved.
Owner:张晓莉
Hot-melting bonding guide pipe type plastic drainage plate
PendingCN107842016ALarge water flowWater capacity is availableSoil preservationMechanical engineeringPost treatment
The invention discloses a hot-melting bonding guide pipe type plastic drainage plate. The hot-melting bonding guide pipe type plastic drainage plate comprises a plastic core plate and a water-permeable filter film wrapping the outer side of the plastic core plate. A drainage groove is formed in the plastic core plate. A center guide pipe used for increasing the overall discharge capacity of the drainage plate, improving the overall strength of the drainage plate and expanding the use function of the drainage plate is arranged in the middle of the plastic core plate. Evenly-distributed water-permeable holes are formed in the pipe wall of the center guide pipe. The water-permeable filter film and the plastic core plate are bonded into a whole through the hot-melting bonding process. According to the hot-melting bonding guide pipe type plastic drainage plate, the phenomenon of poor drainage and even drainage plate failures caused by clogging is solved, and the work efficiency of the drainage plate is effectively improved; and in addition, through the additionally-arranged center guide pipe, the discharge capacity in unit time of the drainage plate is increased, the solidification timeis shortened, meanwhile, the function of the drainage plate is expanded, and the drainage plate can double as a tool for soil foundation aftertreatment.
Owner:TIANJIN UNIV
Construction Method of Gravel Pile Applicable to Saturated Soft Soil
ActiveCN106836205BReduce load capacityRealize small pile distance constructionBulkheads/pilesSoil preservationCrushed stoneRebar
Owner:DA CHENG KE CHUANG INFRASTRUCTURE CO LTD
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