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50 results about "Soil frost" patented technology
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Soil frost-heaving and thawing-settlement tester based on thermoelectric refrigeration control
ActiveCN102435717AReduce labor intensityHigh simulation fidelityEarth material testingWater contentSoil frost
The invention is a soil frost-heaving and thawing-settlement tester based on thermoelectric refrigeration control, which comprises a tester main body, a acquisition control device, a water supplement device, a loading device, wherein the water supplement device is connected with a bottom water supplement groove body of the tester main body; the acquisition control device is connected correspondingly with a A temperature sensor which is responsible for the monitoring of sample temperature gradient change in the tester main body, a displacement sensor, and a hydrostatic sensor; the acquisition control device is connected with a B temperature sensor in a semiconductor refrigerating body; the loading device is disposed in a pressure chamber in the tester main body. The advantages are that: according to the test water content, the test is supplemented with water and drained automatically from the lower part, the water supplement amount is calculated accurately; the hole pressure in the draining process is monitored. Continuous stepless loading is realized; the frost heaving force testing is realized after stepless continuous automatic loading and locking volume, and the simulation truth degree for natural conditions in laboratory frost-heaving and thawing-settlement test is improved, and the test efficiency is improved and the test labor intensity is reduced.
Owner:南京格锐斯维科技有限公司
One-dimensional soil column frost heave deformation tester
PendingCN107024499AAchieve frost heave deformationMonitor temperature fieldMaterial thermal coefficient of expansionSoil sciencePore water pressure
The invention discloses a one-dimensional soil column frost heave deformation tester, the one-dimensional soil column frost heave deformation tester comprises an organic glass mould for containing a one-dimensional cylindrical soil column, a circulator for soil column frost heaving through refrigeration, a test device for soil column frost heave deformation in the frost heaving process, a monitoring device for real-time monitoring of internal temperature change of a soil sample along the soil column height change in the refrigeration process, a water replenishing device for simulation of replenishing groundwater into the soil column from bottom to up, a drainage device, a testing device for testing the pore water pressure of the soil column in the process of frost heaving, and a data acquisition system; the one-dimensional soil column is a cylindrical soil sample, the mould for containing the one-dimensional cylindrical soil column is vertically-arranged cylindrical double-layer transparent organic glass, and the water replenishing device is connected with the bottom of the one-dimensional cylindrical soil column by a water replenishing pipe. The one-dimensional soil column frost heave deformation tester has the advantages of simple structure, reasonable design, practical operation and good practical effect, can simulate the indoor soil frost heave deformation process, and can effectively test soil body internal temperature, pore water pressure, vertical frost-heave capacity, vertical volume deformation and frost heaving force.
Owner:TARIM UNIV
Frost heaving device of layered telescopic detecting soil and detecting method thereof
ActiveCN109781773ASimple structureObtaining is straightforward and accurateMaterial thermal analysisSoil typeDeformation monitoring
The frost heaving device of layered telescopic detecting soil and a detecting method thereof are disclosed. In cold area engineering construction, due to the complicated geological condition of a construction site, the monitoring of frozen soil frost heaving deformation is difficult, and frost heaving data at different depths in one area is difficult to acquire at the same time. In the frost heaving device, a plurality of casing-pipe-type monomers are successively arranged on a chassis from bottom to top, an anchor plate is arranged outside a tube body, a displacement sensor is arranged on theinner wall of the tube body, the top end of the tube body is processed with a boss, the bottom end of the tube body is processed with a groove, and the tube body of one casing-pipe-type monomer is slidably cooperated with the two adjacent casing-pipe-type monomers through the boss and the groove. According to the frozen soil type in a test area, the number of measuring points in the test area andthe distribution position of each measuring point are determined, the frost heaving amount data of the frost heaving layer of each measuring point in different time periods is obtained through the frost heaving device, and according to frost heaving amount data gathering fed back by each measuring point, a frozen soil frost heaving deformation condition in the test area is obtained. The device and the method are used for the monitoring of the frozen soil frost heaving amount in a vertical or horizontal direction.
Owner:凌贤长
Apparatus and method for remote real-time on-line monitoring and assessment of pile foundation stability in freezing-thawing environment
InactiveCN104895125ASimple monitoring methodRealize remote real-time online monitoringFoundation testingFreeze thawingInstability
The invention relates to an apparatus and a method for remote real-time on-line monitoring and assessment of the pile foundation stability in the freezing-thawing environment. The apparatus comprises a signal receiver, a signal line, a reinforced concrete pile, intelligent aggregates, a temperature sensor, a vibration exciter, an underground signal line, a PZT piezoelectric ceramic plate, a data transmission unit (DTU), a GPRS network, servers, and a user terminal. The apparatus and the method are advantageous in that remote real-time on-line monitoring and assessment of the development of seasonal soil frost heaving in cold regions are realized; the monitoring method is simple and easy; quantitative assessment of the evolution of the stability of the pile foundation in the development process of soil frost heaving is realized; measuring results are accurate and reliable, and real-time assessment and early warning of the pile foundation stability are realized via the analysis of measured data so that remedial measures can be taken in time before the instability of the pile foundation.
Owner:WUHAN UNIV
Method for checking anti-frost heaving damage of slope concrete lining layer of water conveyance canal in winter
ActiveCN105447229AEnough thicknessGuaranteed uptimeGeometric CADDesign optimisation/simulationMechanical modelsForce analysis
The present invention relates to a method for checking anti-frost heaving damage of a slope concrete lining layer of a water conveyance canal in winter. The method is applied to the design of an open channel water conveyance canal and to perform a force analysis on a slope concrete lining layer under an 5 of canal base soil frost heaving. The method comprises: by using a canal slope concrete lining layer as a member with a slope foot as a fixed hinge support and a water level surface as a movable hinge support, establishing a mechanical model of checking the anti-frost heaving damage of a canal slope concrete lining layer; and determining, according to a stress generated by a transverse bending effect or / and a stretch-bending combination effect of the member and axial tensile strength of concrete, whether the slope concrete lining layer can resist the damage generated by a frost heaving effect. According to the method for checking anti-frost heaving damage provided by the present invention, influence of interaction between canal slope bidirectional freezing as well as a concrete lining layer and canal base soil deformation is considered; and a deficiency of a checking method of anti-frost heaving damage capacity of a slope concrete lining layer under the circumstance of water conveyance by a concrete canal in a permafrost region is made up.
Owner:SHIHEZI UNIVERSITY
Constant-pressure self-circulation frost heaving test system
PendingCN107907562AWon't wasteMaterial thermal coefficient of expansionWater dischargeWater storage tank
The invention discloses a constant-pressure self-circulation frost heaving test system. The constant-pressure self-circulation frost heaving test system comprises a frost heaving test subsystem and awater pressure control subsystem, wherein the frost heaving test subsystem comprises a test box body and a controller module; a sample box for holding a soil sample is arranged in the box body; a temperature detecting device, a refrigerating device, a displacement detecting device and a pressure device are also arranged in the box body; a base is arranged in the test box body; a water holding reservoir is arranged on the base; the test box is put in the water holding reservoir; the bottom surface of the sample box is a porous backing plate with a certain thickness; the water pressure control subsystem comprises a water storing reservoir and an active water delivering pipe; the water storage reservoir supplies water to the water holding reservoir through a pipeline; the active water delivering device is used for delivering water into the water storage reservoir; a draining outlet is formed in the base; water exceeding a certain position in the water holding reservoir is drained from thedraining outlet. The constant-pressure self-circulation frost heaving test system disclosed by the invention can simulate a water absorption frost heaving deformation test of plain soil and saline soil under a low-temperature environment in a laboratory and can ensure constancy of water pressure and recycling of water for test in the testing process.
Owner:SHANDONG AGRICULTURAL UNIVERSITY
Sliding-sleeve-provided steel pipe pile photovoltaic support foundation used for frozen earth areas
InactiveCN106759273AHas the ability to resist frost heaveUnderstand the purposeProtective foundationBulkheads/pilesFrost heavingSoil frost
The invention discloses a sliding-sleeve-provided steel pipe pile photovoltaic support foundation used for frozen earth areas. The steel pipe pile photovoltaic support foundation comprises a steel pipe pile body which comprises a steel pipe and a spiral disc steel pipe; the inner diameter of the steel pipe is matched with the outer diameter of the upper end part of the spiral disc steel pipe, and the lower end of the steel pipe is detachably connected with the upper end of the spiral disc steel pipe; the lower end of the spiral disc steel pipe is conic, and a spiral disc is arranged at the middle portion of the spiral disc steel pipe; and the outer portion of the steel pipe is sleeved with a U-PVC sleeve, the inner diameter of the U-PVC sleeve is matched with the outer diameter of the steel pipe, and the outer diameter of the U-PVC sleeve is matched with the outer diameter of the part, close to the upper end part, of the spiral disc steel pipe. The steel pipe pile photovoltaic support foundation has the frost heaving resistant capacity and the pile tip construction error adjusting capacity, and pile tip displacement cannot be influenced by foundation soil frost heaving; and the construction method of spinning pile sinking or pile anchoring after excavation is adopted.
Owner:SHANGHAI ELECTRIC POWER DESIGN INST
Geo-technical frozen soil frost heave experiment machine
InactiveCN105352989AMake sure to absorb waterUnimpeded drainageMaterial thermal analysisFreeze thawingGraduated cylinder
The invention discloses a geo-technical frozen soil frost heave experiment machine. The experiment machine comprises the an insulation can; the insulation can comprises a first insulation chamber and a second insulation chamber; a heating device and a refrigeration apparatus are arranged on an inner wall of the first insulation chamber; a base plate is arranged in the first insulation chamber, an organic glass cylinder is arranged on the base plate; a top board is arranged on the upper end of the organic glass cylinder, a pressurization apparatus is arranged on the top board; several water tanks are arranged in the top board, externally connected cold bath is connected with the water tanks through thermotropic circulation solution inlet / outlet pipelines; a pressure transducer is arranged in the organic glass cylinder; through combination of a load transducer and a measuring cylinder, data acquisition for water-absorbing capacity and water-discharge capacity during a determination test process can be determined, change of water volume can be detected by the load transducer, and can be displayed by a data collector, the data is stored by an instrument, so that real-time change of water-absorbing capacity and water-discharge capacity of frozen soil during a freeze thawing process can be obtained.
Owner:TIANJIN GANGYUAN TEST INSTR FACTORY
Tester for soil frost-heaving ratio
InactiveCN105158438AHigh measurement accuracyIt is convenient to study the law of frost heaveEarth material testingTemperature controlControl system
A tester for a soil frost-heaving ratio comprises a base support and a thermostat mounted on the base support, wherein a test platform supported by support rods is arranged in the thermostat, a sample box is arranged on the test platform and adopts a round structure, a hollow structure is arranged in the middle of the sample box, and a pressurization system, a temperature detection system and a deformation detection system are arranged on the sample box; the pressurization system comprises an upper top cover, a lower top cover, an upper bottom plate, a lower bottom plate and a screw rod; the temperature detection system comprises a thermistor thermometer; the deformation detection system comprises a displacement sensor; the upper top cover and the lower bottom plate are jointly connected with a temperature control system and a water replenishment system. The tester can accurately test the frost-heaving ratio of a soil sample and is applicable to detection of different kinds of soil at different freezing temperatures, and a proportional relation between frost heaving force and the frost-heaving ratio is obtained. The tester is simple in structure and convenient to operate and contributes to research of the frost-heaving rule of the soil sample.
Owner:SHANDONG LUDA TEST INSTR
Comprehensive soil frost heaving test device and method
PendingCN107621476AGuaranteed accuracySolve the problem of frost heave experimentMaterial thermal coefficient of expansionTest efficiencyMeasurement device
The invention discloses a comprehensive soil frost heaving test device and method. The lower end of a barrel in the device is arranged on a base plate, a top plate is arranged in the inner cavity of the barrel and can slide along the axial direction of the barrel, and the top plate and the base plate are heat exchange plates respectively; an insulating layer coats the outer surface of the barrel;multiple groups of temperature sensors are arranged at intervals along the axial direction in the barrel for measuring temperatures of a soil sample at different height positions along the axial direction; and a displacement measurement device is used for measuring distance of the barrel moving along the axial direction. When a soil frost heaving test is carried out, the soil sample is cooled by virtue of the top plate and the base plate for simulating soil freezing; and in a freezing process, frost heaving amount and frost heaving ratio of the soil sample can be obtained by virtue of displacement, measured by the displacement measurement device, of the top plate, and the comprehensive soil frost heaving test device and method are applicable to frost heaving tests carried out on fine-grained soil and coarse-grained soil under different conditions. The frost heaving test barrel is easy to make, cost is saved, application range is wide, and test efficiency is greatly improved.
Owner:CHANGAN UNIV
Automatic monitoring system for high-precision soil frost heaving process
PendingCN109738478AHigh precisionAvoid the problem of not being able to read normally while the test is in progressThermometers using electric/magnetic elementsUsing electrical meansTemperature controlSoil science
The invention discloses an automatic monitoring system for high-precision soil frost heaving process, comprising a sample body, a temperature control mechanism, a water supply mechanism, a measuring mechanism, a data collecting mechanism and a seismic isolation bearing, wherein the sample body comprises an organic glass cylinder and a soil sample, the soil sample is placed inside the organic glasscylinder, and the seismic isolation bearing is connected to the bottom of the organic glass cylinder; the temperature control mechanism comprises an incubator, the organic glass cylinder is placed inthe incubator, and a temperature control top plate and a temperature control bottom plate are respectively set on upper and lower sides of the soil sample; the water supply mechanism comprises a water pump, the water outlet of the water pump is connected with a water filling pipe, and the water filling pipe extends through the temperature control bottom plate to the inside of the organic glass cylinder; the measuring mechanism comprises a temperature sensor spirally connected to the side wall of the organic glass cylinder, and a displacement meter disposed above the soil sample, and the temperature sensor and the displacement meter are connected to the data acquisition mechanism. The invention eliminates the influence of mechanical vibration and human reading error on the monitoring result, and deeply reveals the frost heaving mechanism of the soil, and the monitoring result is accurate and reliable.
Owner:SHAOXING UNIV YUANPEI COLLEGE
Rock-soil frost heaving thawed collapse two-dimensional vector measuring method
InactiveCN103884313AWith temperature monitoring functionMonitoring data is reliableMeasurement devicesClassical mechanicsTemperature monitoring
The invention discloses a rock-soil frost heaving thawed collapse two-dimensional vector measuring method. A rock-soil frost heaving thawed collapse two-dimensional meter related in the rock-soil frost heaving thawed collapse two-dimensional vector measuring method solves deformation amount of frost heaving thawed collapse deformation in the normal direction and the tangential direction or vectors of the frost heaving thawed collapse deformation by monitoring the angle variable quantity and the displacement variable quantity, the frost heaving thawed collapse deformation amount in the tangent direction and the frost heaving thawed collapse deformation amount in the normal direction are synchronously monitored in a two-dimensional plane, the rock-soil frost heaving thawed collapse amount is determined, and the aim of monitoring the frost heaving thawed collapse deformation is achieved. The technical defect that in a traditional monitoring method, the one-dimensional vertical deformation amount or the one-dimensional normal deformation amount serves as the frost heaving thawed collapse amount is overcome, and meanwhile the temperature monitoring function is achieved. Reliable and accurate monitoring data can be provided for frost heaving thawed collapse deformation of channel slopes in severe cold areas and cold areas.
Owner:XINJIANG INST OF WATER RESOURCES & HYDRAULIC POWER
Method for producing livestock and poultry feed addictive using Yanzhou succory
InactiveCN101485393AHarvesting methods are scientific and reasonableHigh content of active ingredientsAnimal feeding stuffAccessory food factorsCichoriumChemical products
The invention discloses a method for producing animal feed additives by using Yanzhou chicory, relates to a method for producing animal feed additives by taking chicory as a raw material, and mainly aims to solve the problems that the prior animal feed additives contain chemical products or hormone, while plant animal feed additives have low content of active ingredients and high production cost. The method comprises the following steps that: when chicory plants stop growing and the blooming plants account for about half of the total plants, the chicory plants are harvested, cut into segments and dried; after the harvest, underground rootstalks can perform secondary growth, the secondarily grown plants are harvested and the underground rootstalks are dug before soil frost, the plants and the underground rootstalks are washed, cut into slices and dried, the dried rootstalk slices and dried slices of plants after twice harvest are mixed, crushed and sieved by a 80-mesh sieve. The method has the advantages of high content of the active ingredients, low production cost, and good feeding effect.
Owner:张守岩
Circulating compression-shear soil frost heaving test system and test method
ActiveCN113533096AIncrease loading capacityAvoid influenceMaterial strength using steady shearing forcesMaterial strength using repeated/pulsating forcesTemperature controlSoil science
The invention discloses a circulating compression-shear soil frost heaving test system and test method. The test system comprises a temperature control test cabin, a horizontal loading motor, a vertical loading motor, a horizontal displacement sensor, a horizontal force sensor, a vertical displacement sensor, a vertical force sensor, a pore pressure acquisition instrument, a temperature controller, a Markov water replenishing bottle and a power supply. For a test soil unit, the temperature control test chamber adopts a temperature control metal plate to form a temperature control space around a test piece, so that the test is prevented from being influenced by the atmospheric environment on one hand, and on the other hand, a laminated ring with relatively small thickness can be conveniently adopted in the test, and the loading effect of the horizontal cyclic shear stress of the soil unit is improved. The vertical direction and the horizontal direction of the soil body frost heaving test system can be set to be static or dynamic loading, a soil body frost heaving test, a soil body melting test or a soil body freezing and thawing cycle test under temperature-complex stress path coupling can be carried out, and dynamic parameters such as dynamic shear modulus and damping ratio of frozen soil or positive temperature soil can be tested.
Owner:HARBIN INST OF TECH
Structure for preventing telegraph pole upward pulling due to soil frost heaving
ActiveCN108643680ADecreased swelling shear forceWhen pulling up, (1) prevent the pole from pulling upTowersAcute angleEngineering
The invention relates to a structure for preventing telegraph pole upward pulling due to soil frost heaving. The structure for preventing telegraph pole upward pulling due to soil frost heaving comprises a telegraph pole, a sleeve, a waterproof layer and a drag reduction layer. The sleeve is arranged at the bottom end of the telegraph pole, and the sleeve and the telegraph pole are arranged in thewaterproof layer. The drag reduction layer is arranged on the surface of a pole foor of the telegraph pole, and the sleeve is constituted by a sleeve body and an annular cover which are fixedly connected. The upper end of the annular cover is in acute angle connection with the telegraph pole, and the upper end of the annular cover and the telegraph pole are fixedly connected. The edge of the lower portion of the sleeve body is in a blade shape, and the interior of the sleeve and the position between the sleeve and the waterproof layer are filled with dry and tamped fine sand. Through arrangement of acute angle connection between the upper end of the annular cover and the telegraph pole, acting force of soil frost heaving on telegraph pole upward pulling is converted into vertical downwardacting force, resistance of telegraph pole upward pulling is increased, and the problem of telegraph pole upward pulling due to soil frost heaving can be avoided well.
Owner:ELECTRIC POWER RES INST OF EAST INNER MONGOLIA ELECTRIC POWER +2
Soil frost heave force measurement device and measurement method
PendingCN107991339AAccurate measurementSimple structureMaterial thermal analysisApparatus for force/torque/work measurementMeasurement deviceEngineering
The invention discloses a soil frost heave force measurement device, which comprises a measurement tank and a measurement element. The measurement tank is divided into three areas, i.e. a water tank,a soil carrying tank and a measurement area from bottom to top through a permeable carrying plate and a top plate; a water inlet pipe is arranged on an outer wall of one side of the water tank; a water outlet pipe is arranged on an outer wall of the other side of the water tank; the soil carrying tank is used for placing a tested soil sample; a plurality of permeable holes are formed in the permeable carrying plate on the lower part, and a piece of thin filter paper covers; water in the water tank is immersed into the soil sample in the soil carrying tank through the permeable holes; two reinforcing steel bars are symmetrically arranged in the measurement area; the bottom parts of the reinforcing steel bars are fixedly connected with a top plate; the top parts of the reinforcing steel barspress against on a tank cover; the tank cover seals on the measurement tank; slideways for the top plate to slide up and down are arranged on two opposite side walls of an area on which the soil carrying tank and the measurement area are located; the measurement element comprises two reinforcing steel bar stress detectors arranged on the corresponding reinforcing steel bars. The measurement device provided by the invention is simple in structure, convenient to operate and capable of accurately measuring a soil frost heave force.
Owner:SHENYANG JIANZHU UNIVERSITY
Multi-loading-mode unsaturated soil frost heaving instrument and frost heaving amount testing method
ActiveCN110954573ARelieve stressApplicable frost heave characteristicsMaterial thermal analysisTemperature controlControl system
The invention discloses a multi-loading-mode unsaturated soil frost heaving instrument and a frost heaving amount testing method. The frost heaving instrument comprises a sample storage system, a loadcontrol system, a humidity control system, a temperature control system and a thermostat, the sample storage system comprises a sample cylinder and a temperature disc, an air inlet is formed in the bottom end of the sample cylinder, a cavity is formed in the temperature disc, a water-proof and air-proof film is arranged outside the cavity bottom, a liquid inlet and a liquid outlet are formed in the cavity top, the temperature disc is arranged in the top end of the sample cylinder, and the sample cylinder is arranged in the constant-temperature box; the load control system comprises a counter-force frame and a load control mechanism, the load control mechanism is arranged in the counter-force frame, the counter-force frame is erected in the thermostat, and the load control mechanism is arranged in the counter-force frame and connected with the temperature disc; the humidity control system is communicated with an air inlet of the sample cylinder; an output port of the temperature control system is communicated with a liquid inlet in the temperature disc, and an outlet of the temperature control system is communicated with a liquid outlet in the temperature disc. Frost heaving testsin multiple loading modes can be carried out, gaseous water supply can be achieved, and frost heaving of coarse-grained soil is induced.
Owner:CENT SOUTH UNIV
Transmission telegraph pole pull-up preventing structure with reset function
InactiveCN108589760ADecreased swelling shear forceReduce weightProtective foundationElectricityAcute angle
The invention relates to a transmission telegraph pole pull-up preventing structure with a reset function. The structure comprises a telegraph pole, a drag reduction layer, an annular cover and a reset device; the telegraph pole is vertically arranged, the reset device is arranged at the bottom end of the telegraph pole, the annular cover is arranged on the upper portion of the reset device, an acute angle is formed between the conical tip end of the annular cover and the telegraph pole, the conical tip end of the annular cover is fixedly connected with the telegraph pole, and the drag reduction layer is arranged on the surface of a pole root of the telegraph pole; the reset device is composed of tires and hubs, the tires and the hubs are installed in a matched mode and are horizontally placed, the bottommost end of the telegraph pole is fixedly connected with the hub at the uppermost layer, and the other end of the annular cover is also fixedly connected with the hub at the uppermostlayer. According to the structure, by adopting the acute angle connection arrangement between the upper end of the annular cover and the telegraph pole, the pull-up acting force of soil frost heavingon the telegraph pole is converted into the vertically-downward acting force, so that the pull-up resistance of the telegraph pole is increased, and the problem that the telegraph pole is pulled up due to soil frost heaving can be well solved.
Owner:ELECTRIC POWER RES INST OF EAST INNER MONGOLIA ELECTRIC POWER +2
Controllable temperature soil frost heaving tester
PendingCN108037268AEvenly cooled (heated)Improve test accuracyTemperatue controlEarth material testingTemperature controlControl system
The invention discloses a controllable temperature soil frost heaving tester, which overcomes the problem that the soil frost heaving in the field cannot be fully simulated. The controllable temperature soil frost heaving tester comprises a test box (1), an ambient temperature control system, a soil temperature monitoring system, an information acquisition system (14), and a computer (15). The test box (1) includes a main box and a soil sample tube (2), and a partition plate (12) is provided in the main box; the soil sample tube (2) includes a top plate (3), a bottom plate (4), and a cylinder(5); two sets of cooling / heating devices (13) of the ambient temperature control system and an upper top plate (3) are connected with an upper circulating liquid pipe (9) of a lower bottom plate (4) and a lower circulating liquid pipe (10), four plug-in temperature sensors (11) of the soil temperature monitoring system are inserted into the soil samples in a cylinder (5), and the information terminals of the four plug-in temperature sensors (11) are connected to the information acquisition system (14); and the information acquisition system (14) is connected to a computer (15).
Owner:JILIN UNIV
Self-balancing soil frost heaving test device and test method thereof
PendingCN106970203ASolve the problem of frost heaving force testSimple structureThermometers using electric/magnetic elementsEarth material testingStructural engineeringSoil frost
The invention discloses a self-balancing soil frost heaving double-barrel test device and a test method of the test device. The device comprises an inner barrel and an outer barrel, wherein a top plate is arranged at the top end of the inner barrel; holes are reserved in the centers of the top plate and bottom plates of the barrels; an anchor rope dynamometer channel equivalent to the diameter of each hole is arranged in a centering manner; an anchor rope dynamometer is connected with an acquirer by a lead wire; five temperature measurement pipes are reserved in corresponding height positions of inner and outer barrel walls in height directions of barrel bodies; five outer water replenishment ports are uniformly formed in a perimeter direction in the outer barrel walls close to the bottoms of the barrels; water replenishment pipeline terminals connected with the outer water replenishment ports are connected with a water pressure tank with constant volume; inner exhaust ports are reserved in the bottom plate of the inner barrel; outer drainage ports are reserved in the bottom plate of the outer barrel, and provided with valves; the bottoms of the barrels are embedded into a fixed support; and four bolt holes are formed in the fixed support. The test device is simple in structure, convenient to operate and wide in application scope, and requires no separate pressure device.
Owner:SHENYANG JIANZHU UNIVERSITY
Field observation facility for radial-flow experiment site suitable for seasonally frozen-melted region
InactiveCN102680661AGuaranteed uptimeResistance to frost heave damageEarth material testingLower borderSurface runoff
The invention discloses a field observation facility for a radial-flow experiment site suitable for a seasonally frozen-melted region. A transverse wall, a surface runoff and soil lateral seepage collecting device, a left longitudinal wall and a right longitudinal wall are arranged at the borders of a slope experiment site and surround to form an experiment farmland, wherein the transverse wall is located at the upper border of the slope experiment site; the longitudinal walls extend to the surface runoff and soil lateral seepage collecting device along the slope of the slope experiment site; the surface runoff and soil lateral seepage collecting device is vertical to the surface runoff flow direction of the slope experiment site, is arranged at the lower border of the slope experiment site, and is as wide as the slope experiment site; and a diversion pool and a water tank are located in the downslope direction of the surface runoff and soil lateral seepage collecting device. The field observation facility for the radial-flow experiment site meets the field observation for hydrologic process and soil erosion under both the rainfall and snowmelt conditions, and can effectively resist the damage from soil frost heaving and ensure the normal running of the experiment site.
Owner:程红光
Servo type soil frost heaving and thaw collapse test device and test method thereof
PendingCN112083025AFacilitate test developmentImprove test efficiencyMaterial thermal analysisWater bathsSoil science
The invention discloses a servo type soil frost heaving and thaw collapse test device and a test method thereof, and relates to a test device and a test method. According to the invention, the problemof no related research on frost heaving and thaw collapse characteristic test related equipment and test method of the soil body under the condition of applying a constant load in the prior art is solved. A refrigerating system is installed on a base, a test cabin is installed on the refrigerating system, a heating device is installed in the test cabin, a sample mold is installed in the test cabin, a displacement sensor is installed on the sample mold, a pressurizing device is installed at the upper end of the test cabin, a water supplementing device is installed on the outer side wall of thetest cabin, a control system, a data acquisition module and a water bath system are sequentially mounted on the right sides of the test cabin and the refrigerating system from top to bottom. The method comprises the steps of preparing a sample; installing and connecting a sample mold; connecting the water bath system with the sample mold; setting test parameters; supplementing water to the sample; and observing whether the test time of the sample reaches a set time length or not, and if so, stopping the test. The device is used for soil frost heaving and thaw collapse tests.
Owner:HEILONGJIANG PROVINCIAL HYDRAULIC RES INST
Large frost heaving test system for coarse-grained soil
PendingCN114384110AImprove accuracyIsolation of cold and heat exchangeThermometer detailsMaterial thermal coefficient of expansionSoil scienceTemperature monitoring
The invention relates to a large-scale frost heaving test system for coarse-grained soil, and aims to solve the problems that most of researches on frost heaving test devices are concentrated on fine-grained soil at present, and frost heaving researches on the coarse-grained soil are few. The large frost heaving test system for the coarse-grained soil comprises a base constant-temperature water replenishing system, a temperature monitoring system, a top freezing system and a frost heaving deformation monitoring system, according to the freezing mode, through a freezing refrigeration top plate (9), a hollow core test cylinder (5), a bottom constant temperature device (4), a first water bath refrigerator (15), a second water bath refrigerator (20) and a bottom water system, a more accurate one-way freezing test under the water supplementing condition is achieved; on the aspect of frost heaving deformation monitoring, the frost heaving deformation amount of soil is accurately and automatically monitored through a digital display dial indicator (16), and the automation and accuracy of the test are improved; the device is applied to the field of coarse-grained soil frost heaving tests, and provides certain support for the frost heaving problem in projects such as roads, buildings and water conservancy.
Owner:HEILONGJIANG PROVINCIAL HYDRAULIC RES INST
Soil frost heaving detection device without external power supply and detection method of soil frost heaving detection device
ActiveCN109884112AReduce disturbanceSimple structureMaterial thermal coefficient of expansionDeformation monitoringEngineering
The invention relates to a soil frost heaving detection device without an external power supply and a detection method of the soil frost heaving detection device. In the construction of cold region engineering, frost heaving deformation monitoring of frozen soil is high in difficulty and low in efficiency, and most of existing soil frost heaving detection devices require continuous external powersupplies, so that corresponding matched instrument equipment on the surface is relatively numerous, the occupied area is large, surface damage parts are relatively numerous, and the operation steps are complicated. According to the device, a sleeve pipe is arranged on a base plate; an upper anchor plate is fixedly connected to the upper end of the sleeve pipe; an elastic part is arranged in the sleeve pipe; the stress end of a tension sensor penetrates through the upper anchor plate to be connected with one end of the elastic part; and the other end of the elastic part is connected with the base plate through a connecting rod. According to the method, a soil frost heaving detection device is correspondingly installed at each measuring point; frost heaving amount data of a frost heaving layer wherein each measuring point is located in different time periods is obtained through each soil frost heaving detection device; and a frost heaving deformation situation of the frozen soil in a test area is obtained by summarizing the frost heaving amount data fed back by all the measuring points. The detection device and the detection method are used for monitoring the frost heaving amount ofthe frozen soil.
Owner:HARBIN INST OF TECH
Solar photovoltaic support foundation in frozen soil area and construction method
PendingCN114737595AImprove stabilityImprove pullout resistancePhotovoltaic energy generationVibration suppression adjustmentsSoil scienceStructural engineering
The invention provides a frozen soil area solar photovoltaic support foundation and a construction method, the frozen soil area solar photovoltaic support foundation comprises a pile foundation, the pile foundation comprises a stand column section and an anti-pulling section, the anti-pulling section is integrally arranged at the bottom of the stand column section, air bag sleeve rods are arranged on the side edge of the stand column section in an annular array mode, and compensation air bags are arranged in the air bag sleeve rods; the bottom of each lifting piston is fixedly provided with an extrusion seat through a telescopic connecting rod, and the gravity ball is movably arranged in a swing groove formed in the anti-pulling section. The compensation air bags arranged on the side edges of the stand column sections are used for counteracting longitudinal and transverse extrusion, caused by seasonal frozen soil frost heaving, of surrounding soil, and the compensation air bags are used for compensating the thaw collapse phenomenon caused by melting of ice columns in surrounding geology after the frozen soil is melted. And the upright post can be corrected through the same-side expansion of the compensation air bag, so that the stability of the pile foundation is greatly improved.
Owner:中广核新能源六安有限公司
Self-balancing soil frost heaving experiment barrel and experiment method thereof
PendingCN107153111ASolve the problem of frost heaving force testSimple structureThermometers using electric/magnetic elementsEarth material testingStructural engineeringOrganic glass
The invention discloses a self-balancing soil frost heaving experiment barrel and an experiment method thereof. The self-balancing soil frost heaving experiment barrel comprises a barrel body, a cylindrical anchor rope dynamometer passage is mounted at the center of the barrel body, an organic glass top plate closely contacting with the wall of the barrel body and capable of sliding up and down is arranged at the top end of the barrel body, a hole is reserved in the center of each of the top plate and a bottom plate of the barrel body, an anchor rope dynamometer is connected with a collector through a lead, five temperature measuring holes are reserved in the height direction of the barrel wall, five water replenishing ports are arranged on the barrel wall close to the bottom of the barrel body and higher than the upper edge of a fixing support along the circumference direction, a water replenishing pipeline terminal connected with the water replenishing ports is connected with a water pressure tank with constant volume, a liquid turbine flow meter is mounted on each water replenishing pipeline, five exhaust ports are arranged on the bottom plate of the barrel body, and the bottom of the barrel body is nested with the fixing support. The experiment barrel is simple in structure, needless of a separate pressurizing device, convenient to operate and wide in application range.
Owner:SHENYANG JIANZHU UNIVERSITY
A method for using a soil frost heaving and water-heat migration coupling visualization experiment auxiliary device
ActiveCN109884111BEasy to fillEasy to disassembleMaterial thermal coefficient of expansionEarth material testingSoil scienceGelisol
Owner:HARBIN INST OF TECH
Foundation pit side wall frost heaving prevention method
The invention discloses a foundation pit side wall frost heaving prevention method, and belongs to the technical field of building construction. The side wall of a foundation pit is provided with a water draining hole, the water draining hole is a metal pipe draining pipe, a water draining hole is formed in the metal pipe, the outer portion of the segment, inserted into the soil on the side wall of the foundation pit, of the metal pipe is wrapped with water filter gauze, the metal pipe is connected with a power cathode, a metal bar is connected with a power anode, the metal bar corresponds tothe metal pipe on the same side, the ground surface of the position, between the metal bar and the side wall of the foundation pit, of the upper portion of the foundation pit is provided with waterproof geotechnical cloth, the metal pipe is connected with the power cathode, the metal bar is connected with the power anode, the metal pipe and the metal bar are correspondingly mounted, water in soilcan be smoothly drained, and through a method of reducing the water containing amount in the soil, soil frost heaving damage to the side wall of the foundation pit can be prevented.
Owner:辽宁省建筑设计研究院岩土工程有限责任公司
Unsaturated Soil Frost Heave Apparatus and Frost Heave Test Method with Multiple Loading Modes
ActiveCN110954573BRelieve stressApplicable frost heave characteristicsMaterial thermal analysisTemperature controlTest sample
Owner:CENT SOUTH UNIV
A Soil Monitoring Method Using a Settlement Point Device Resistant to Soil Heaving and Thawing
ActiveCN106289162BWill not be affected bySimple structureEarth material testingHeight/levelling measurementEngineeringSoil frost
Owner:SHENYANG JIANZHU UNIVERSITY
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