CN110455646B - Visual interface direct shear apparatus capable of considering temperature and seepage effect - Google Patents
Visual interface direct shear apparatus capable of considering temperature and seepage effect Download PDFInfo
- Publication number
- CN110455646B CN110455646B CN201910832248.7A CN201910832248A CN110455646B CN 110455646 B CN110455646 B CN 110455646B CN 201910832248 A CN201910832248 A CN 201910832248A CN 110455646 B CN110455646 B CN 110455646B
- Authority
- CN
- China
- Prior art keywords
- temperature
- seepage
- normal
- interface
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000000007 visual effect Effects 0.000 title claims abstract description 32
- 230000000694 effects Effects 0.000 title claims abstract description 20
- 239000002689 soil Substances 0.000 claims abstract description 68
- 238000010008 shearing Methods 0.000 claims abstract description 33
- 238000012360 testing method Methods 0.000 claims abstract description 33
- 239000002245 particle Substances 0.000 claims abstract description 26
- 230000009471 action Effects 0.000 claims abstract description 23
- 230000002277 temperature effect Effects 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 109
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 25
- 239000008397 galvanized steel Substances 0.000 claims description 25
- 238000004088 simulation Methods 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 13
- 230000008859 change Effects 0.000 claims description 12
- 230000001276 controlling effect Effects 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 11
- 230000033001 locomotion Effects 0.000 claims description 10
- 238000005452 bending Methods 0.000 claims description 8
- 230000003204 osmotic effect Effects 0.000 claims description 8
- 239000004575 stone Substances 0.000 claims description 7
- 230000003628 erosive effect Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 abstract description 4
- 238000013508 migration Methods 0.000 abstract description 4
- 230000005012 migration Effects 0.000 abstract description 4
- 239000008187 granular material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
- G01N2203/0647—Image analysis
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a visual interface direct shear apparatus with consideration of temperature and seepage effect, which comprises a direct shear apparatus body, a detachable seepage module, a temperature effect module and a visual high-definition particle capture module. The direct shear apparatus body can realize interface direct shear tests under normal stress, normal rigidity and normal volume normal boundaries by utilizing two sets of tangential and normal servo systems. The normal boundary condition of the direct shear apparatus body mainly depends on displacement and force signals fed back by a normal servo motor, and realizes normal boundary control of equal volume, equal stress and equal rigidity. The direct shear apparatus can not only realize normal boundaries of normal stress, normal rigidity and normal volume, but also consider soil body seepage-shearing action and temperature-shearing action, and can deeply explore shear strength characteristics and a particle migration microscopic mechanism at an interface before and after the soil body at the interface of a structure undergoes seepage and temperature circulation by combining a visual high-definition capturing means.
Description
Technical Field
The invention relates to a temperature control module, a seepage module and a visual high-definition particle capture module, in particular to a visual interface direct shear apparatus capable of considering temperature-shearing and seepage-shearing effects. The direct shear apparatus can not only realize normal boundaries of normal stress, normal rigidity and normal volume, but also consider soil body seepage-shearing action and temperature-shearing action, and can deeply explore shear strength characteristics and a particle migration microscopic mechanism at an interface before and after a soil body on the interface of a structure undergoes seepage flow and after the soil body undergoes temperature circulation by combining a visual high-definition capturing means.
Background
In ocean engineering, suction anchors are widely used due to their wide application range, short construction time, reusability, low cost, etc. The penetration installation is a key step in the construction process of the suction bucket foundation. The suction bucket forms the negative pressure through the water pump with bucket water-logging in the installation, and the pressure differential inside and outside through the bucket is sunk with suction bucket foundation and is run through to the design elevation. In the process of water pumping and injection, a seepage field can be formed near the wall of a suction bucket, fine particles in the discontinuous grading soil body are likely to be eroded under the action of seepage force, and along with the increase of the seepage quantity of the soil particles, the strength of an interface between the soil body and the bucket wall can be reduced, so that the actual uplift bearing capacity of the soil body is lower than the design value.
The day and night temperature difference of the marine environment is large, and the temperature gradient is large from the sea level to a deeper sea area; in addition, the geothermal energy pile can bear the load of an upper structure and can be widely applied as a vertical heat exchange system at present. Under the action of temperature, a temperature field can be formed inside the energy pile, a strain field is formed inside the pile body after expansion with heat and contraction with cold, and then a stress field is formed inside the pile body, and the strain stress field is shown in the characteristics of different conventional pile-soil interfaces due to the influence of surrounding soil bodies, upper and lower section constraints and other factors.
In practical engineering, evaluation and test of changes of interface shear behavior before and after soil bodies and structures are subjected to seepage action or temperature action are often involved, however, no relevant experimental equipment and technology can detect and evaluate the influence of seepage or temperature on interface shear strength at present.
The interface direct shear apparatus is a better interface strength testing device, and has more applications because of simple and convenient operation and more accurate measured data. At present, the direct shear apparatus at home and abroad gradually develops towards large-scale, comprehensive and automatic, the function of test equipment is complete, and the loading and data acquisition basically realize automation. However, the current researches and equipments on the soil particle migration of the interface shearing, the formation of shear band, the evolution of physical state and the local deformation mechanism are still few.
Based on the background, in order to better study the influence of the soil body seepage-shearing action and the temperature-shearing action on the interface shearing behavior, the invention provides a visual interface direct shear apparatus capable of considering the temperature and the seepage action.
Disclosure of Invention
The invention aims to provide a visual interface direct shear apparatus capable of considering temperature and seepage effect, which comprises a detachable seepage module, a temperature effect module and a visual high-definition particle capture module, wherein the visual interface direct shear apparatus can be used for researching the influence of temperature or seepage effect on interface strength, simulating the shearing behavior change of soil bodies on the inner side and the outer side of an ocean suction bucket and a steel interface after seepage occurs and the pipeline damage caused by the scouring of soil bodies around a submarine oil and gas pipeline, and researching the shearing strength change of a structure and the soil body interface under the temperature effect. The invention integrates the temperature action and the seepage action on one interface direct shear apparatus, thereby effectively improving the functionality and the convenience of the apparatus.
The invention adopts the following technical scheme:
a visual interface direct shear apparatus with consideration of temperature and seepage effect comprises a direct shear apparatus body, a detachable seepage module, a temperature effect module and a visual high-definition particle capture module;
the direct shear apparatus body comprises a base, a tangential servo motor, a rigid reaction frame, a servo control system, a horizontal slide rail, a slide block, a detachable simulation interface galvanized steel plate, a uncovered water bath box, a vertically movable cover plate, a bearing plate and a normal servo motor, wherein the horizontal slide rail, the slide block, the detachable simulation interface galvanized steel plate, the uncovered water bath box, the vertically movable cover plate, the bearing plate and the normal servo motor are sequentially arranged on the base from bottom to; the rigid reaction frame is arranged on the base, the normal servo motor is arranged on the rigid reaction frame, and two side surfaces of the rigid reaction frame are also provided with vertical sliding rails; a vertical limiting and adjusting valve is arranged at the joint of the vertically movable cover plate and the vertical slide rail; a square transparent limiting ring is arranged in the uncovered water bath box; the square transparent limiting ring is hollow, the top of the square transparent limiting ring is connected with the bottom of the vertically movable cover plate, and a test soil body is arranged in the square transparent limiting ring; a force sensor is arranged between the sliding block and the tangential servo motor, and the sliding block can horizontally move along the horizontal sliding rail; the servo control system is used for controlling the tangential servo motor and the normal servo motor; the tangential servo motor and the normal servo motor are respectively used for controlling the horizontal movement of the sliding block and the up-and-down movement of the square transparent limiting ring, so that the interface shearing of the test soil body can be simulated;
the detachable seepage module comprises a water inlet pipeline, a water outlet pipeline and a seepage pressure flow regulating system; the water inlet pipeline is sequentially connected with a water storage tank, a first valve, a water pressure sensor, an electromagnetic flowmeter and a square transparent limiting ring, and the water outlet pipeline is sequentially connected with the square transparent limiting ring, a second valve, a particle collecting device, a water pump and the water storage tank; the side of the square transparent limiting ring close to the water inlet pipe is provided with a permeable stone for rectifying the inlet water and enabling the inlet water to uniformly and stably flow into a test soil body; round holes are uniformly formed in the side, close to the water outlet pipe, of the square transparent limiting ring, two clamping plates with holes are arranged on the side, perpendicular to the seepage direction, of the square transparent limiting ring, the hole diameters of the round holes are consistent with those of the holes in the clamping plates, so that the two clamping plates are symmetrically opened and closed towards two sides perpendicular to the seepage path, and the seepage hole diameter can be controlled to change within a required range (when the holes in the clamping plates and the holes in the square transparent limiting ring are completely staggered, the seepage hole diameter is 0, and when the holes in the clamping plates and the holes in the square transparent limiting ring are completely overlapped, the seepage hole diameter is; the outer side of the clamping plate is provided with a watertight plate, a closed cavity is formed between the watertight plate and the clamping plate, and the closed cavity is connected with a water outlet pipeline;
the temperature action module comprises an S-shaped copper pipe, a temperature sensor, a temperature regulation system and a water storage tank; the S-shaped copper pipe is embedded in the detachable simulated interface galvanized steel plate and is connected with the water storage tank through a water pipe; the temperature regulation and control system is used for controlling the temperature of circulating water in the water storage tank, the S-shaped copper pipe heats the uncovered water bath tank through the circulating water, and the temperature sensor is used for measuring the temperature in the uncovered water bath tank and feeding the temperature back to the temperature regulation and control system for regulation;
the visual high-definition particle capturing module comprises an underwater high-definition camera and an image processing system, wherein the underwater high-definition camera is arranged on the inner wall of the uncovered water bath box and is used for monitoring the soil motion condition of an interface position;
the servo control system, the osmotic pressure flow regulating system, the temperature regulating system and the image processing system are integrated in a computer for control;
the square transparent limiting ring and the square transparent limiting ring with the adjustable seepage aperture are provided with a pair of bending elements in the vertical shearing direction at a distance of 2mm from the detachable simulated interface galvanized steel plate, and the bending elements are used for detecting the shear wave velocity of the soil body in various states and evaluating the shear modulus of the soil body in shearing (seepage and corrosion).
In the technical scheme, furthermore, the slider is connected with the detachable simulation interface galvanized steel plate through a nut, the square transparent limiting ring is connected with the vertically movable cover plate through a nut, and the distance between the square transparent limiting ring and the detachable simulation interface galvanized steel plate can be adjusted through the vertical limiting adjusting valve, the vertical slide rail and the vertically movable cover plate.
Furthermore, the center of the bottom of the bearing plate is provided with a soil pressure gauge which can compare the magnitude of the normal force with the force sensor.
Furthermore, the seepage module can apply seepage pressure of 1-500 kPa and seepage pressure of 0-20 cm to the soil body through the seepage pressure regulating system and the water inlet pipeline and the water outlet pipeline3Flow rate in/s.
Furthermore, the tangential servo motor and the normal servo motor can both provide shearing force and normal pressure of 0-1 MPa.
Furthermore, the particle collecting device comprises a set of standard sieves, and the aperture of each standard sieve is sequentially reduced from top to bottom and is used for determining the integral corrosion amount and the particle grading change.
Furthermore, the temperature sensors are uniformly arranged on the detachable simulation interface galvanized steel plate in a straight line, the uniformity of the temperature at the interface of the detachable simulation interface galvanized steel plate and the test soil body can be verified, the temperature cycle is realized, and the temperature range is 0-70 ℃.
Furthermore, the rectangular permeable stone is embedded into the square transparent limiting ring, and the embedding depth is half of the thickness of the side wall of the square transparent limiting ring.
The direct shear apparatus body can realize interface direct shear tests under normal stress, normal rigidity and normal volume normal boundaries by utilizing two sets of tangential and normal servo systems. The normal boundary condition of the interface direct shear apparatus body mainly depends on displacement and force signals fed back by a normal servo motor, and realizes normal boundary control of equal volume, equal stress and equal rigidity. The equal-volume and equal-stress control is to keep displacement and axial force readings in the shearing process unchanged, wherein the equal-rigidity control mainly adjusts normal pressure through measuring vertical displacement of soil and a rigidity calculation formula to realize equal-rigidity boundary conditions.
When soil body seepage-shear test is carried out, normal boundary conditions are firstly adjusted, the cover plate can be vertically moved through the drive of the normal servo motor, and therefore the position of the square transparent limiting ring is adjusted to enable the square transparent limiting ring to be in close contact with the bottom of the uncovered water bath box. The water storage tank, the first valve, the water pressure sensor, the electromagnetic flowmeter, the square transparent limiting ring, the second valve, the particle collecting device, the water pump and the osmotic pressure flow regulating and controlling system are connected in sequence through pipelines to form a closed loop, the tightness is checked, and the water tightness is guaranteed to be good. And adjusting the flow and the seepage pressure to be constant values, adjusting the aperture of the square transparent limiting ring according to the grain diameter of the sample, and opening the first valve and the second valve to carry out soil body seepage. After seepage is finished, the water inlet pipeline and the water outlet pipeline are sequentially detached, the position of the square transparent limiting ring is adjusted through the vertically movable cover plate again, the limiting ring and the bottom of the uncovered water bath box are provided with small seams, and the influence of friction between the limiting ring and the bottom of the uncovered water bath box on test precision is avoided. And then, carrying out interface shearing, and researching the change of the soil body and the structure interface strength before and after the seepage corrosion. Shear wave velocity tests can be carried out before and after the test (the interface shear of the tested soil body is respectively simulated by the tangential servo motor and the normal servo motor), and the influence of the seepage and erosion effects on the shear stiffness of the soil body can be researched.
When the soil body temperature-shear test is carried out, the normal boundary condition is firstly adjusted, the S-shaped copper pipe, the temperature sensor, the temperature regulation system and the water storage tank are well connected, the two clamp plates on the side surface of the square transparent limiting ring are closed, water is injected into the uncovered water bath tank to submerge the top of the test soil body, the temperature is controlled through the computer, and interface shear is carried out after the temperature effect (the interface shear of the test soil body is respectively simulated through the tangential servo motor and the normal servo motor), so that the interface shear behavior of the soil and the structure under the constant temperature effect can be researched, and the change of the interface shear behavior of the soil and the structure after the temperature cycle can be researched. And the bending element can be used for carrying out shear wave velocity test to compare the change of the shear stiffness of the soil body before and after the temperature-shear action.
In addition, a visual high-definition particle capture module can be used for tracking the characteristics of particle migration, shear band formation, physical state evolution and local deformation at the interface, and the test phenomenon can be explained from a micro mechanism. The various sensors in the invention all adopt high-precision sensors.
The invention has the following advantages:
the visual interface direct shear apparatus capable of considering temperature and seepage effects adopts a seepage module to consider the seepage effects of soil, a temperature effect module to simulate the influence of temperature on interface shearing, and a visual high-definition particle capture module to acquire the motion conditions and the state evolution of soil particles at an interface. The multi-normal constraint module considers the actual stress state of the soil body and can monitor the real-time state quantity of the seepage-shearing or temperature-shearing action of the soil body. The invention integrates the temperature action and the seepage action on one interface direct shear apparatus, thereby effectively improving the functionality and the convenience of the apparatus.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a front view of the integrated device;
FIG. 2 is a side view of the integrated device;
FIG. 3 is a sectional top view A-A;
FIG. 4 is a sectional top view B-B;
FIG. 5 is a cross-sectional view of a seepage module;
FIG. 6 is a S-shaped copper tube burying diagram;
FIG. 7 is a schematic diagram of normal restraint module vertical control;
FIG. 8 is a schematic diagram of the integration of modules;
FIG. 9 is a partial view of a square transparent stop collar;
wherein, 2 can dismantle seepage flow module, 3 temperature effect module, 4 visual high definition granule catch module, 5 bases, 6 tangential servo motor, 7 rigid reaction frame, 8 servo control system, 9 horizontal slide rail, 10 slider, 11 can dismantle simulation interface galvanized steel sheet, 12 uncovered water bath case, 13 can vertically move apron, 14 loading boards, 15 normal servo motor, 16 vertical slide rail, 17 vertical spacing governing valve, 18 square transparent spacing ring, 19 force transducer, 20 inlet pipe, 21 outlet pipe, 22 osmotic pressure flow regulation and control system, 23 storage water tank, 24 first valve, 25 water pressure transducer, 26 electromagnetic flowmeter, 27 second valve, 28 granule collection device, 29 water pump, 30 splint, 31S type copper pipe, 32 temperature sensor, 33 temperature regulation and control system, 34 underwater high definition camera, 35 image processing system, 36 computer, 37 bending element, 38 nuts, 39 nuts, 41 standard sieves, 42 closed cavities and 43 permeable stones.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 shows a visual interface direct shear apparatus with consideration of temperature and seepage effect, which comprises a direct shear apparatus body, a detachable seepage module 2, a temperature effect module 3 and a visual high-definition particle capture module 4; the direct shear apparatus body comprises a base 5, a tangential servo motor 6, a rigid reaction frame 7, a servo control system 8, a horizontal slide rail 9, a slide block 10, a detachable simulation interface galvanized steel plate 11, a cover-free water bath tank 12, a vertically movable cover plate 13, a bearing plate 14 and a normal servo motor 15 which are sequentially arranged on the base 5 from bottom to top; the rigid reaction frame 7 is arranged on the base 5, the normal servo motor 15 is arranged on the rigid reaction frame 7, and two side surfaces of the rigid reaction frame 7 are also provided with vertical slide rails 16; a vertical limiting and adjusting valve 17 is arranged at the joint of the vertically movable cover plate 13 and the vertical slide rail 16; the inside of the uncovered water bath box 12 is provided with a square transparent limiting ring 18, and the center positions of the two planes are the same before shearing. The square transparent limiting ring 18 is hollow, a test soil body is arranged in the square transparent limiting ring, the top of the square transparent limiting ring is connected with the bottom of the vertically movable cover plate 13, and the distance between the square transparent limiting ring 18 and the detachable simulation interface galvanized steel plate 11 is adjusted through the vertical limiting adjusting valve 17, the vertical sliding rail 16 and the vertically movable cover plate 13; a high-precision force sensor 19 is arranged between the sliding block 10 and the tangential servo motor 6, and the sliding block 10 can horizontally move along the horizontal sliding rail 9; the servo control system 8 is used for controlling the tangential servo motor 6 and the normal servo motor 15; the tangential servo motor 6 and the normal servo motor 15 are respectively used for controlling the horizontal movement of the sliding block 10 and the up-down movement of the square transparent limiting ring 18, so that the interface shearing of a test soil body can be simulated;
the detachable seepage module 2 comprises a water inlet pipeline 20, a water outlet pipeline 21 and a seepage pressure flow regulating system 22; the water inlet pipeline 20 is sequentially connected with a water storage tank 23, an osmotic pressure flow regulating system 22, a first valve 24, a water pressure sensor 25, an electromagnetic flowmeter 26 and a square transparent limiting ring 18, and the water outlet pipeline 21 is sequentially connected with the square transparent limiting ring 18, a second valve 27, a particle collecting device 28, a water pump 29 and the water storage tank 23; a round hole is arranged at the central position of the bottom of the side of the square transparent limiting ring 18 close to the water inlet pipeline 20, the round hole is connected with the water inlet pipeline 20, a permeable stone 43 embedded into the side transparent limiting ring 18 is arranged at the position of the side close to the test soil body and is used for rectifying the inflow water so as to enable the inflow water to uniformly and stably flow into the test soil body, and the embedding depth of the permeable stone 43 is half of the wall thickness of the square transparent limiting ring 18; the side of the square transparent limiting ring 18, which is close to the water outlet pipeline 21, is uniformly provided with round holes with the diameter of 2mm, the side is provided with two clamp plates 30 with holes along the direction vertical to the seepage flow, the diameter of the round holes on the clamp plates 30 is 2mm, and the two clamp plates can be symmetrically opened and closed outwards perpendicular to the seepage flow path, so that the seepage flow hole diameter is controlled to be changed from 0 mm to 2 mm; the outer side of the clamping plate 30 is provided with a watertight plate, a cavity 42 is sealed between the watertight plate and the clamping plate, and the bottom of the cavity 42 is connected with the water outlet pipeline 21.
The temperature action module 3 comprises an S-shaped copper pipe 31, a temperature sensor 32, a temperature regulation and control system 33 and a water storage tank 23; the S-shaped copper pipe 31 is embedded on the detachable simulated interface galvanized steel plate 11 and is connected with the water storage tank 23 through a water pipe; the temperature regulation and control system 33 is used for controlling the temperature of circulating water in the water storage tank 23, the S-shaped copper pipe 31 heats the uncovered water bath tank 12 through the circulating water, and the temperature sensor 32 is used for measuring the temperature in the uncovered water bath tank 12 and feeding the temperature back to the temperature regulation and control system 33 for regulation;
the visual high-definition particle capturing module 4 comprises an underwater high-definition camera 34 and an image processing system 35, wherein the underwater high-definition camera 34 is arranged on the inner wall of the uncovered water bath 12 and used for monitoring the soil motion condition of an interface position; the image processing system 35 is used for processing the image shot by the underwater high-definition camera 34;
the servo control system 8, the osmotic pressure flow regulating system 22, the temperature regulating system 33 and the image processing system 35 are integrated in a computer 36 for control;
the square transparent limiting ring 18 is provided with a pair of bending elements 37 in the vertical shearing direction at a distance of 112 mm from the detachable simulation interface galvanized steel plate and is used for detecting the shear wave velocity of the soil body in various states.
The slideThe block 10 is connected with the detachable simulation interface galvanized steel plate 11 through a nut 38, the square transparent limiting ring 18 is connected with the vertically movable cover plate 13 through a nut 39, and the uncovered water bath box 12 is welded on the detachable simulation interface galvanized steel plate 11. And the center of the bottom of the bearing plate 14 is provided with a soil pressure gauge for comparing the normal force with the force sensor 19. The seepage pressure applied to the soil body by the seepage pressure flow control system 22 is 1-500 kPa, and the flow is 0-20 cm3And s. The shearing force and the normal pressure provided by the tangential servo motor 6 and the normal servo motor 15 are 0-1 MPa. Granule collection device 28 include a set of standard sieve 41, the aperture is 2mm, 1mm, 0.5mm, 0.25mm, 0.1mm, 0.075mm from top to bottom in proper order for confirm that whole infiltration loses volume and granule gradation change. The temperature sensors 32 are uniformly arranged on the detachable simulation interface galvanized steel plate 11 in a straight line and used for verifying the uniformity of the temperature at the interface of the detachable simulation interface galvanized steel plate and the test soil body and feeding back the real-time temperature to the temperature regulation and control system 33 for regulation, wherein the temperature range is 0-70 ℃.
When soil body seepage-shear test is carried out, the normal boundary condition is firstly adjusted, the vertically movable cover plate 13 is driven by the normal servo motor 15 to move up and down, and therefore the position of the square transparent limiting ring 18 is adjusted to be in close contact with the bottom of the uncovered water bath tank 12. A water storage tank 23, a first valve 24, a water pressure sensor 25, an electromagnetic flowmeter 26, a square transparent limiting ring 18, a second valve 27, a particle collecting device 28, a water pump 29 and an osmotic pressure flow regulating system 22 are connected in sequence through pipelines to form a closed loop, and the tightness is checked to ensure good water tightness. The flow rate and the seepage pressure are adjusted to be constant values, the aperture of the square transparent limiting ring 18 and the aperture of the clamping plate 30 are adjusted according to the grain diameter of the sample (the movement of the clamping plate is controlled to control the seepage aperture), and the first valve 24 and the second valve 27 are opened to carry out seepage. After the seepage is finished, the water inlet pipeline 20 and the water outlet pipeline 21 are sequentially detached, and the position of the square transparent limiting ring 18 is adjusted through the vertically movable cover plate 13 again, so that a small gap is formed between the square transparent limiting ring 18 and the bottom of the uncovered water bath box 12, and the influence of the friction between the limiting ring 18 and the bottom of the uncovered water bath box 12 on the test precision is avoided. And then, carrying out interface shearing (respectively simulating the interface shearing of the test soil body through a tangential servo motor and a normal servo motor) to research the change of the soil body and the interface strength of the structure before and after the seepage and the erosion. The shear wave velocity test can be carried out before and after the test, and the influence of the seepage and erosion effects on the shear stiffness of the soil body can be researched.
When the soil body temperature-shearing test is carried out, the normal boundary condition is firstly adjusted, the S-shaped copper pipe 31, the temperature sensor 32, the temperature regulation and control system 33 and the water storage tank 23 are well connected, the two clamping plates on the side surface of the square transparent limiting ring are closed, water is injected into the uncovered water bath box 12 to submerge the top of the tested soil body, the temperature is controlled through the computer, and interface shearing is carried out after the temperature action (the interface shearing of the tested soil body is respectively simulated through the tangential servo motor and the normal servo motor), so that the interface shearing behavior of the soil and the structure under the constant temperature action can be researched, and the change of the interface shearing behavior of the soil and the structure after the temperature circulation can be researched. The bending element 37 can also be used for shear wave velocity test, and the change of the shear stiffness of the soil body before and after the temperature-shear action is compared.
The technical solution provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. A visual interface direct shear apparatus with consideration of temperature and seepage effect comprises a direct shear apparatus body, and is characterized by further comprising a detachable seepage module (2), a temperature effect module (3) and a visual high-definition particle capture module (4);
the direct shear apparatus body comprises a base (5), a tangential servo motor (6), a rigid reaction frame (7), a servo control system (8), a horizontal slide rail (9), a slide block (10), a detachable simulation interface galvanized steel plate (11), a cover-free water bath box (12), a vertically movable cover plate (13), a bearing plate (14) and a normal servo motor (15), wherein the horizontal slide rail (9), the slide block (10), the detachable simulation interface galvanized steel plate (11), the cover-free water bath box (12) are sequentially arranged on the base (5) from bottom to top; the rigid reaction frame (7) is arranged on the base (5), the normal servo motor (15) is arranged on the rigid reaction frame (7), and two side surfaces of the rigid reaction frame (7) are also provided with vertical slide rails (16); a vertical limiting and adjusting valve (17) is arranged at the joint of the vertically movable cover plate (13) and the vertical slide rail (16); a square transparent limiting ring (18) is arranged in the uncovered water bath box (12); the square transparent limiting ring (18) is hollow and is provided with a test soil body, and the top of the square transparent limiting ring is connected with the bottom of the vertically movable cover plate (13); a force sensor (19) is arranged between the sliding block (10) and the tangential servo motor (6); the servo control system (8) is used for controlling the tangential servo motor (6) and the normal servo motor (15);
the detachable seepage module (2) comprises a water inlet pipeline (20), a water outlet pipeline (21) and a seepage pressure flow regulating system (22); the water inlet pipeline (20) is sequentially connected with a water storage tank (23), an osmotic pressure flow regulating system (22), a first valve (24), a water pressure sensor (25), an electromagnetic flowmeter (26) and a square transparent limiting ring (18), and the water outlet pipeline (21) is sequentially connected with the square transparent limiting ring (18), a second valve (27), a particle collecting device (28), a water pump (29) and the water storage tank (23); a permeable stone (43) is arranged on the side, close to the water inlet pipeline (20), of the square transparent limiting ring (18) and is used for rectifying inlet water and enabling the inlet water to uniformly and stably flow into a test soil body; the side of the square transparent limiting ring (18) close to the water outlet pipeline (21) is uniformly provided with round holes, the outer side of the square transparent limiting ring is provided with a clamping plate (30) with holes, the diameter of the round holes is consistent with that of the holes on the clamping plate (30), and the seepage aperture can be adjusted by controlling the movement of the clamping plate (30); the outer side of the clamping plate (30) is provided with a watertight plate, a closed cavity (42) is formed between the watertight plate and the clamping plate, and the closed cavity (42) is connected with the water outlet pipeline (21);
the temperature action module (3) comprises an S-shaped copper pipe (31), a temperature sensor (32), a temperature regulation and control system (33) and a water storage tank (23); the S-shaped copper pipe (31) is embedded on the detachable simulated interface galvanized steel plate (11) and is connected with the water storage tank (23) through a water pipe; the temperature regulation and control system (33) is used for controlling the temperature of circulating water in the water storage tank (23), the S-shaped copper pipe (31) heats the uncovered water bath tank (12) through the circulating water, and the temperature sensor (32) is used for measuring the temperature in the uncovered water bath tank (12) and feeding the temperature back to the temperature regulation and control system (33) for regulation;
the visual high-definition particle capturing module (4) comprises an underwater high-definition camera (34) and an image processing system (35), wherein the underwater high-definition camera (34) is arranged on the inner wall of the uncovered water bath tank (12) and is used for monitoring the soil motion condition of an interface position; the image processing system (35) is used for processing images shot by the underwater high-definition camera (34);
the servo control system (8), the osmotic pressure flow regulating and controlling system (22), the temperature regulating and controlling system (33) and the image processing system (35) are integrated in a computer (36) for control;
the square transparent limiting ring (18) is 2mm away from the detachable simulated interface galvanized steel plate (11) and is provided with a pair of bending elements (37) in the vertical shearing direction, and the bending elements are used for detecting the shear wave velocity of the soil body in various states.
2. The visual interface direct shear apparatus considering temperature and seepage effect according to claim 1, wherein the slide block (10) is connected with a detachable simulated interface galvanized steel plate (11) through a nut (38), the square transparent limiting ring (18) is connected with a vertically movable cover plate (13) through a nut (39), and the uncovered water bath tank (12) is welded on the detachable simulated interface galvanized steel plate (11).
3. The visual interface direct shear apparatus considering temperature and seepage effect according to claim 1, wherein the bearing plate (14) is provided with a soil pressure gauge at the center of the bottom thereof for comparing the normal force with the force sensor (19).
4. The visual interface direct shear apparatus considering temperature and seepage effect as claimed in claim 1, wherein the seepage pressure applied to the soil body by the seepage pressure and flow rate control system (22) is 1-500 kPa, and the flow rate is 0-20 cm3/s。
5. The visual interface direct shear apparatus considering temperature and seepage effect according to claim 1, wherein the shear force and normal pressure provided by the tangential servo motor (6) and the normal servo motor (15) are 0-1 MPa.
6. The visual interface direct shear apparatus considering temperature and seepage effect according to claim 1, wherein the particle collection device (28) comprises a set of standard sieves (41) with decreasing pore size from top to bottom for determining the overall erosion and particle grading change.
7. The visual interface direct shear apparatus considering temperature and seepage effect according to claim 1, wherein the temperature sensors (32) are uniformly arranged on the detachable simulated interface galvanized steel plate (11) in a straight line for verifying the temperature uniformity at the interface of the detachable simulated interface galvanized steel plate and the test soil body, and the temperature control range is 0-70 ℃.
8. The visual interface direct shear apparatus considering temperature and seepage effect according to claim 1, wherein the permeable stone (43) is embedded in the square transparent spacing ring (18) to a depth of half of the wall thickness of the square transparent spacing ring (18).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910832248.7A CN110455646B (en) | 2019-09-04 | 2019-09-04 | Visual interface direct shear apparatus capable of considering temperature and seepage effect |
| PCT/CN2019/104513 WO2021042322A1 (en) | 2019-09-04 | 2019-09-05 | Visual interface-based direct shear apparatus capable of taking temperature and seepage effect into consideration |
| JP2020557981A JP6948475B1 (en) | 2019-09-04 | 2019-09-05 | Visualization interface direct shearing machine that can consider temperature and osmotic flow action |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910832248.7A CN110455646B (en) | 2019-09-04 | 2019-09-04 | Visual interface direct shear apparatus capable of considering temperature and seepage effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110455646A CN110455646A (en) | 2019-11-15 |
| CN110455646B true CN110455646B (en) | 2020-05-22 |
Family
ID=68490627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910832248.7A Active CN110455646B (en) | 2019-09-04 | 2019-09-04 | Visual interface direct shear apparatus capable of considering temperature and seepage effect |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6948475B1 (en) |
| CN (1) | CN110455646B (en) |
| WO (1) | WO2021042322A1 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122280A (en) * | 2019-12-16 | 2020-05-08 | 重庆大学 | Large direct shear test sample preparation device for reinforcing coarse-grained soil by microorganisms and using method |
| CN112504870A (en) * | 2020-11-17 | 2021-03-16 | 大连理工大学 | Test system and method for directly measuring interface shear strength at different temperatures |
| CN112525795B (en) * | 2020-11-20 | 2023-03-28 | 中国电建集团华东勘测设计研究院有限公司 | Soil body infiltration and corrosion test device at structural crack |
| CN113125308B (en) * | 2021-03-18 | 2022-08-09 | 同济大学 | Test system for inducing osmotic corrosion phenomenon by suction barrel penetration and upward pulling |
| CN113049342B (en) * | 2021-04-13 | 2023-09-22 | 郑州大学 | Direct shear test device and method considering mud skin formation conditions and interface normal displacement |
| CN113466126B (en) * | 2021-05-25 | 2022-05-20 | 浙江大学 | Multifunctional interface shearing device capable of performing saturation and consolidation and considering temperature effect |
| CN113552315B (en) * | 2021-06-10 | 2023-12-26 | 重庆大学溧阳智慧城市研究院 | Multifunctional transparent soil model test master control system device and application method thereof |
| CN113804560B (en) * | 2021-07-30 | 2023-09-26 | 南华大学 | Unsaturated soil and structure interface shear visualization test device and method |
| CN114166718B (en) * | 2021-11-26 | 2023-07-21 | 哈尔滨工程大学 | Device and method for observing disturbance seepage phenomenon among liquid-holding particle swarm |
| CN114017070B (en) * | 2021-12-08 | 2023-08-25 | 河北工程大学 | Visualization device capable of being used for simulating grouting particle accumulation effect of fractured rock mass |
| CN114199679B (en) * | 2021-12-09 | 2024-05-28 | 南京大学 | Distributed in-situ test method for frozen soil multi-physical parameters based on optical fiber drawing |
| CN114687387B (en) * | 2022-02-10 | 2024-03-19 | 浙江工业大学 | Simulation entity controller platform of foundation pit axial force servo system |
| CN114809121A (en) * | 2022-03-28 | 2022-07-29 | 台州市椒江建设工程质量检测中心有限公司 | Pile foundation horizontal load test device |
| CN115420630B (en) * | 2022-08-30 | 2023-06-06 | 中国水利水电科学研究院 | Composite vertical loading mechanism for field load and direct shear test and loading method thereof |
| CN117686355A (en) * | 2023-12-27 | 2024-03-12 | 中国石油大学(华东) | System and method for testing interfacial shear strength in suction foundation penetration-extraction process |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02254338A (en) * | 1989-03-28 | 1990-10-15 | Mitsubishi Electric Corp | Thermal shock tester |
| CN203365229U (en) * | 2013-07-12 | 2013-12-25 | 上海大学 | Large interface characteristic direct shear apparatus applying cyclic load |
| CN104964878A (en) * | 2015-07-14 | 2015-10-07 | 中国科学院武汉岩土力学研究所 | Triaxial test system and method for unsaturated soil multi-field coupling |
| CN106124343A (en) * | 2016-08-25 | 2016-11-16 | 绍兴文理学院 | The pilot system of THMC coupling during consideration rock joint shear |
| CN106248506A (en) * | 2016-09-27 | 2016-12-21 | 山东大学 | A kind of visualization direct shear apparatus device and method |
| CN106680103A (en) * | 2017-02-14 | 2017-05-17 | 南京泰克奥科技有限公司 | Rock temperature-permeation-stress-chemical coupling multifunctional test system and operation method thereof |
| CN107576562A (en) * | 2017-10-19 | 2018-01-12 | 南京泰克奥科技有限公司 | A kind of multi- scenarios method true triaxial test system and its test method |
| CN107748110A (en) * | 2017-09-19 | 2018-03-02 | 太原理工大学 | The axle dynamic shearing seepage flow of microcomputer controlled electro-hydraulic servo rock three couples multifunction test method |
| CN108204916A (en) * | 2018-01-26 | 2018-06-26 | 河北工业大学 | A kind of shearing-low temperature coupling experiment device and method for penetrating through crack |
| CN108398338A (en) * | 2018-01-30 | 2018-08-14 | 河海大学 | It is a kind of can temperature control geomembrane and soil contact face shearing test device and test method |
| CN109374440A (en) * | 2018-10-25 | 2019-02-22 | 浙江大学 | A kind of interface ring shear apparatus for being contemplated that the soil body and seeping erosion effect |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29521732U1 (en) * | 1995-02-09 | 1998-05-20 | Geso Ges Fuer Sensorik Geotech | Device for checking and monitoring the condition of dikes, dams or weirs |
| CN105699196B (en) * | 2016-01-28 | 2018-09-25 | 河海大学 | Rock seepage-stress-temperature-chemical Coupling rheological measurement device and its method |
| CN107084876A (en) * | 2017-05-17 | 2017-08-22 | 绍兴文理学院 | A kind of high temperature of CT real-time three-dimensionals scanning, seepage flow, shearing coupling rock triaxial test system |
| CN110018057B (en) * | 2019-04-17 | 2022-11-11 | 山东科技大学 | Microseismic-shear-seepage coupling testing device and testing method |
-
2019
- 2019-09-04 CN CN201910832248.7A patent/CN110455646B/en active Active
- 2019-09-05 WO PCT/CN2019/104513 patent/WO2021042322A1/en active Application Filing
- 2019-09-05 JP JP2020557981A patent/JP6948475B1/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02254338A (en) * | 1989-03-28 | 1990-10-15 | Mitsubishi Electric Corp | Thermal shock tester |
| CN203365229U (en) * | 2013-07-12 | 2013-12-25 | 上海大学 | Large interface characteristic direct shear apparatus applying cyclic load |
| CN104964878A (en) * | 2015-07-14 | 2015-10-07 | 中国科学院武汉岩土力学研究所 | Triaxial test system and method for unsaturated soil multi-field coupling |
| CN106124343A (en) * | 2016-08-25 | 2016-11-16 | 绍兴文理学院 | The pilot system of THMC coupling during consideration rock joint shear |
| CN106248506A (en) * | 2016-09-27 | 2016-12-21 | 山东大学 | A kind of visualization direct shear apparatus device and method |
| CN106680103A (en) * | 2017-02-14 | 2017-05-17 | 南京泰克奥科技有限公司 | Rock temperature-permeation-stress-chemical coupling multifunctional test system and operation method thereof |
| CN107748110A (en) * | 2017-09-19 | 2018-03-02 | 太原理工大学 | The axle dynamic shearing seepage flow of microcomputer controlled electro-hydraulic servo rock three couples multifunction test method |
| CN107576562A (en) * | 2017-10-19 | 2018-01-12 | 南京泰克奥科技有限公司 | A kind of multi- scenarios method true triaxial test system and its test method |
| CN108204916A (en) * | 2018-01-26 | 2018-06-26 | 河北工业大学 | A kind of shearing-low temperature coupling experiment device and method for penetrating through crack |
| CN108398338A (en) * | 2018-01-30 | 2018-08-14 | 河海大学 | It is a kind of can temperature control geomembrane and soil contact face shearing test device and test method |
| CN109374440A (en) * | 2018-10-25 | 2019-02-22 | 浙江大学 | A kind of interface ring shear apparatus for being contemplated that the soil body and seeping erosion effect |
Non-Patent Citations (2)
| Title |
|---|
| 考虑渗流效应的冲流带泥沙起动机理研究;曹志刚 等;《水科学进展》;20190731;第30卷(第4期);第568-580页 * |
| 非饱和土抗剪强度理论的关键问题与研究进展;付宏渊 等;《中国公路学报》;20180228;第31卷(第2期);第1-14页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021529936A (en) | 2021-11-04 |
| JP6948475B1 (en) | 2021-10-13 |
| WO2021042322A1 (en) | 2021-03-11 |
| CN110455646A (en) | 2019-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110455646B (en) | Visual interface direct shear apparatus capable of considering temperature and seepage effect | |
| CN110208115B (en) | Seepage module of embeddable interface ring shear apparatus considering soil body seepage corrosion | |
| JP7000594B2 (en) | Test equipment and test method that can simulate erosion effect and interfacial shear in mounting suction bucket foundation | |
| Robbins et al. | A novel laboratory test for backward erosion piping | |
| CN105716960A (en) | Foundation pit excavation model test device used in complicated groundwater environment | |
| CN113670571B (en) | Motion response test device for hoisting mooring marine structure under action of abnormal gravity flow | |
| CN106442937B (en) | A kind of novel sea shallow-layer soil strength variation detection system and its appraisal procedure | |
| CN105716958B (en) | Simulate the foundation model experimental rig of artesian head lifting | |
| CN212568764U (en) | Induced grouting experimental model for saturated fine sand layer | |
| CN104614151A (en) | Device and method for utilizing sand launder seepage to simulate coastal zone salt-fresh water abrupt interface | |
| CN112834375B (en) | Soil and stone water tank erosion test device considering seepage | |
| Hossain et al. | Soil flow mechanisms around and between stiffeners of caissons during installation in clay | |
| CN109680645A (en) | A kind of construction density current test layer knot environment water device and method | |
| CN113378402A (en) | Method for detecting leakage of deep covering layer riverbed dam | |
| CN111208023A (en) | Seepage-fatigue coupling load test device and method | |
| CN104846772B (en) | The measuring method of channel deposit block initial velocity under hyper-concentration flow effect | |
| CN205712213U (en) | The dynamically excavation of foundation pit model test apparatus of artesian water effect | |
| CN110595886B (en) | Model test device and method for researching soft clay thermal consolidation effect | |
| CN110608977B (en) | Measuring method for lateral undercurrent exchange in indoor simulation natural river course evolution process | |
| CN112538874A (en) | Guide-enhanced barrel-type foundation penetration test model device and method | |
| Masselink et al. | BARDEX II: Bringing the beach to the laboratory–again! | |
| CN112195986A (en) | Offshore barrel type foundation simulation test model device and penetration test method | |
| CN113466126B (en) | Multifunctional interface shearing device capable of performing saturation and consolidation and considering temperature effect | |
| CN208350320U (en) | It opens a sluice gate formula and persistently enters the dual-purpose density current experimental rig of streaming | |
| CN208201768U (en) | A kind of physical model that silt carrying flow influences Stratified reservoir water temperature structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |