CN210091528U - Simulation device for roadbed cavity model - Google Patents
Simulation device for roadbed cavity model Download PDFInfo
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- CN210091528U CN210091528U CN201920548656.5U CN201920548656U CN210091528U CN 210091528 U CN210091528 U CN 210091528U CN 201920548656 U CN201920548656 U CN 201920548656U CN 210091528 U CN210091528 U CN 210091528U
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Abstract
A simulation device for a roadbed cavity model comprises a model box, a pavement loading mechanism, a water supply pressure mechanism, a soil body freezing mechanism, a PIV mechanism, a water content detection mechanism and the like; the top surface of the model box is provided with an opening, the interior of the model box is filled with a soil body to be observed and an organic glass tube, and the organic glass tube is provided with a damaged opening; the road surface loading mechanism is provided with a load plate, and the load plate is positioned on the top surface of the model box to apply pressure to a soil body to be tested; the water supply pressure mechanism is connected with the organic glass pipe to provide controllable stable pressure water; the soil body freezing mechanism is provided with a liquid nitrogen transmission pipe for providing nitrogen, the liquid nitrogen transmission pipe is attached to the outer side of the organic glass pipe, and the pipe orifice of the liquid nitrogen transmission pipe is flush with the damaged orifice; the PIV mechanism is used for acquiring displacement and coordinate images of soil at a control point; the water content detection mechanism is provided with a plurality of sensors which are respectively arranged around the organic glass tube. The utility model discloses can satisfy the research demand that cavity development law and peripheral soil body warp and intensity under the condition to different water pressure, different ground loads.
Description
Technical Field
The utility model relates to a road bed cavity model field, especially a simulation device of road bed cavity model.
Background
In recent years, serious accidents of uneven pavement settlement and pavement collapse frequently occur all over the country, and the life and property safety of people is harmed. The investigation and analysis show that the main reason of the accidents is roadbed holes caused by the damage of underground water supply pipelines and the leakage of pressurized water. However, related researches are few, and a complete and rigorous model device is not available for measuring the size of a roadbed cavity, the strength of soil bodies near the cavity and the soil body migration characteristics in the cavity forming process caused by the damage of a water supply pipeline. Therefore, the device and the method for researching the roadbed cavity model caused by the damage of the water supply pipeline have great significance for preventing and treating the underground hidden soil cavity and preventing and treating the uneven settlement of roads and building structures.
However, most of the existing devices and methods for measuring roadbed cavities ignore the displacement and strength of soil around the damaged position of the pipeline in the soil cavity development process. Secondly, the shape of the soil cavity cannot be measured, especially for non-cohesive soils such as sandy soils.
In order to research the underground soil cavity formation mechanism under the coupling action of a pressure field and a seepage field under actual conditions, the conventional soil cavity measurement model cannot meet the requirements. Therefore, the development of a roadbed cavity model device which can provide various water supply pressure systems and can simulate the damage of a water supply pipeline under the real road surface load condition has important significance.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an above-mentioned defect among the prior art is overcome to main aim at, provides a simulation has roadbed cavity model device under pressure water supply pipe seepage and the road surface load coupling effect to survey the soil cave development in-process, displacement and the intensity of the peripheral soil body of pipeline damage department and to the soil cave shape, especially the soil cave shape of one kind of cohesiveness soil body of sandy soil, satisfy the research demand that cavity development law and peripheral soil body warp and intensity under the condition to different water pressure, different ground loads.
The utility model adopts the following technical scheme:
the utility model provides a simulator of road bed cavity model which characterized in that: the device comprises a model box, a pavement loading mechanism, a water supply pressure mechanism, a soil body freezing mechanism, a PIV mechanism and a water content detection mechanism; the top surface of the model box is provided with an opening, the interior of the model box is filled with a soil body to be observed and an organic glass tube, and the organic glass tube is provided with a damaged opening; the road surface loading mechanism is provided with a load plate, and the load plate is positioned on the top surface of the model box to apply pressure to a soil body to be tested; the water supply pressure mechanism is connected with the organic glass pipe to provide controllable stable pressure water; the soil body freezing mechanism is provided with a liquid nitrogen transmission pipe for providing nitrogen, the liquid nitrogen transmission pipe is attached to the outer side of the organic glass pipe, and the pipe orifice of the liquid nitrogen transmission pipe is flush with the damaged orifice; the PIV mechanism is used for acquiring displacement and coordinate images of soil at a control point; the water content detection mechanism is provided with a plurality of sensors which are respectively arranged around the organic glass tube.
The model box is provided with two pipeline interfaces opposite to the organic glass pipe, and the pipeline interfaces are communicated with the organic glass pipe and the water supply pressure mechanism.
The road surface loading mechanism also comprises a jack and a reaction frame; the model box is arranged at the bottom of the reaction frame; the jack is arranged on the top of the reaction frame and connected with the load bearing plate.
The reaction frame comprises a cross beam, a bottom plate and two upright columns; the jack is installed on the cross beam; the bottom plate is provided with the model box; the upright posts are connected between the cross beam and the bottom plate.
The water supply pressure mechanism comprises an air press, a liquid storage tank and a liquid storage tank; the air pressure machine is communicated with a liquid storage tank through a pipeline, and the liquid storage tank is communicated with one end of an organic glass tube through a pipeline; the liquid storage tank is communicated with the other end of the organic glass tube through a pipeline.
The water supply pressure mechanism also comprises a plurality of pressure reducing valves, and the pressure reducing valves are arranged on the pipeline.
The soil body freezing mechanism is also provided with a liquid nitrogen pump which is communicated with the liquid nitrogen transmission pipe; the liquid nitrogen transmission pipe is positioned right above the organic glass pipe.
The PIV mechanism comprises a PIV camera, an image analysis unit and a control point, and the PIV camera is positioned outside the model box and is opposite to the organic glass tube; the control point is arranged on the side wall of the model box.
From the above description of the present invention, compared with the prior art, the present invention has the following advantages:
1. the water supply pressure mechanism of the utility model is provided with an air compressor, a pressure reducing valve and a plurality of high-precision air pressure reducing valves to provide stable air pressure; 1 stainless steel branch pipe relief pressure valve has been set up, can provide the stable water pressure of equidimension not through the regulation and control air compressor machine.
2. The utility model discloses simulate road surface structure at the mold box to with the hand jack that can stand upside down of gear formula, can simulate the true condition of reduction more.
3. The utility model uses the PIV mechanism, adopts the high-definition camera to detect, and the whole measuring process does not need to be in direct contact with the soil body, and does not generate disturbance to the soil body; the speed measurement method is carried out by taking the self-culture of the soil body as the tracing mark, namely the control point, so that the problems of asynchrony between the control point and the soil body, missing of the control point and the like are avoided. The movement of soil particles around the damaged sewer pipes under different water pressures can be observed by utilizing particle imaging speed measurement.
4. The utility model discloses be equipped with moisture content detection mechanism, the moisture content of measurable quantity different positions soil to determine the intensity of the soil of different moisture contents according to the triaxial test, reachd the relation of soil intensity and moisture content and calculate out the intensity of different positions soil directly perceivedly, it is comparatively accurate.
5. The utility model discloses the soil body that contains freezes the mechanism, can conveniently measure the cavity of different soil bodies (especially sandy soil) to realize freezing of the peripheral certain limit soil body of soil body.
Drawings
FIG. 1 is a drawing of the apparatus of the present invention;
fig. 2 is a side view of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a schematic view of a plexiglas tube;
FIG. 5 is a cross-sectional view of FIG. 4;
wherein: 10. the device comprises a model box, 11, organic glass tubes, 12, a damaged opening, 13, a pipeline interface, 20, a road surface loading mechanism, 21, a load plate, 22, a jack, 23, a cross beam, 24, a stand column, 25, a bottom plate, 30, a water supply pressure mechanism, 31, an air press, 32, a liquid storage tank, 33, a liquid storage tank, 34, a pipeline, 35, a pressure reducing valve, 40, a liquid nitrogen transmission tube, 41 and a liquid nitrogen tank.
Detailed Description
The present invention will be further described with reference to the following detailed description. The utility model discloses an each drawing only is the schematic in order to understand more easily the utility model discloses, its specific proportion can be adjusted according to the design demand. In the drawings, the relative relationship of elements in the drawings as described above should be understood by those skilled in the art to mean that the relative positions of the elements are correspondingly determined by the elements on the front and the back for easy understanding, and therefore, the elements may be turned over to present the same elements, and all should fall within the scope of the present disclosure.
Referring to fig. 1 to 5, a simulation apparatus for a roadbed cavity model includes a model box 10, a road surface loading mechanism 20, a water supply pressure mechanism 30, a soil freezing mechanism, a PIV mechanism, a water content detection mechanism, and the like. The top surface of the model box 10 is provided with an opening, the interior of the model box is filled with a soil body to be observed and an organic glass tube 11, and the organic glass tube 11 is provided with a damaged opening 12.
Specifically, the mold box 10 may be a rectangular parallelepiped made of (1000 × 800 × 1000) mm plexiglass without a top surface, the plexiglass tube 11 has a thickness of 2mm, a length of 996mm, and a radius of 20mm, and has a thickness of 2mm, and the pipe joints 13 of the circular high-pressure hoses are respectively disposed at the same positions on both sides of the mold box 10. The organic glass pipe 11 is a semicircular pipe, and semicircular sections at two ends of the organic glass pipe are tangent to the pipe joints 13 on the side wall of the model box 10. The semi-cylindrical organic glass tube 11 and the inner wall of the model box 10 are bonded through acrylic glue.
The semi-cylindrical transparent PVC pipe simulates a road pipeline, so that the movement of water flow in the pipeline and the process of soil body migration and soil cave formation around the damaged port 12 caused by water pressure can be conveniently and directly observed; the side surface of the model box 10 is respectively provided with 1 semicircular opening (the specific position is shown in the attached drawing) with the same size, the diameter of the circular opening of the side wall of the model box 10 is 20mm, the circular opening is positioned 800mm below the top edge of the model box 10 (the specific position is shown in the attached drawing), and the circular opening is internally tangent to the semicircular section of the organic glass tube 11; the rectangular surface of the organic glass tube 11 is bonded with the inner wall of the model box 10 through an ABS transparent acrylic plate adhesive, so that the test and observation are facilitated. The position of the damaged opening 12 on the organic glass tube 11 is located on the curved surface of the pipeline, and the size of the damaged opening 12 is 0.5mm in diameter and is used for simulating the influence of the damaged pipeline on the soil.
The road surface loading mechanism 20 includes a load plate 21, a jack 22, a reaction frame, and the like. The reaction frame comprises a cross beam 23, a bottom plate 25 and two upright posts 24, wherein the cross beam 23 is provided with a jack 22, the bottom plate 25 is provided with the model box 10, the upright posts 24 are connected between the cross beam 23 and the bottom plate 25 and positioned at two sides of the model box 10, and the upright posts 24 and the cross beam 23 can be connected by welding. The jack 22 is connected with the loading plate to apply pressure to the soil body to be measured.
In particular, the load plate 21 may be (995 × 795 × 10) mm in size of a load-bearing steel plate. The jack 22 can be a gear type invertible jack, and the invertible jack 22 is arranged in the center of the beam 23 at the top of the loading counterforce frame and is bolted with the beam 23 through the bottom. The reaction frame adopts a steel frame body, and the size of a steel base plate is (1000X 800X 15) mm. The size of the bearing steel plate is slightly smaller than that of the top of the model box 10, and the bearing steel plate is placed right above a soil body in the model box 10. The model box 10 is arranged on a bottom plate 25, the bottom plate 25 is connected with the upright posts 24 through 4 steel L-shaped corner connectors, three channel steels (the specific positions are shown in the attached drawing) are arranged below the bottom plate 25, and the middle channel steels are connected with the two upright posts 24 in a welding mode.
In practical application, the length of the load plate 21 is planned to be 995mm, the width of the load plate is 795mm, the height of the load plate is 10mm, the 3.2-ton gear type hand-operated invertible jack (the size of a top plate is 20mm), 2 symmetrical and vertically arranged steel stand columns (the height of 1285mm, the width of 85mm, and the thickness of No. 10 channel steel) are adopted, 1 steel cross beam (the length of 1100mm, the width of 200mm, and the thickness of 50 mm) is adopted, 1 steel bottom plate of a reaction frame with the block size of (the length of 1000mm, the width of 800mm, and the thickness of 15mm), 4 steel L-shaped angle codes (the length of 125mm, the width of 25mm, the height of 125mm, the thickness of 3mm) and 3 channel steel (the length of 1000mm, the width of. The load-bearing steel plate is placed above the soil mass in the model box 10 to simulate a road surface, and when the load-bearing steel plate is loaded, pressure is generated on the soil mass below the load-bearing steel plate. The load applying structure adopts a 3.2-ton gear type hand-operated invertible jack (the size of a top disc is 200mm), the bottom of the jack 22 is bolted with a cross beam 23, the position of the top disc of the jack 22 is adjusted, so that the top disc of the jack 22 is just in contact with a bearing iron plate, and the top of the jack is used for applying pressure to the surface of the bearing steel plate through pressure to simulate road surface load.
The water supply pressure mechanism 30 includes an air press 31, a reservoir 32, a reservoir 33, a plurality of pipes 34, and a plurality of pressure reducing valves 35. The pipe 34 may be a high pressure hose, and the pressure reducing valve 35 may be a stainless steel manifold pressure reducing valve. The air press 31 is connected with the center of the top cover of the liquid storage tank 32 through a pipeline 34, and 3 high-precision air pressure reducing valves are connected to the section of water pipe for reducing pressure step by step, so that the influence of the fluctuation pressure output by the air press 31 on the air pressure is reduced.
In practical application, the performance indexes of the components are preferably as follows: the air pressure machine (220V, 1000W), high-precision air reducing valve (6 minutes), 304 stainless steel liquid storage tank (500L, 2mm thick), 1 stainless steel branch pipe reducing valve (6 minutes) and a plurality of sections of high-pressure hoses (external diameter 25mm, internal diameter 20 mm. the air reducing valve is provided with teeth through 6 minutes reducing two-way PE pipe but the lock catch ball valve is connected with the high-pressure hoses, 16 minutes reducing two-way PE pipe provided with teeth but the lock catch ball valve is respectively arranged on the left and the right of each air reducing valve, the air tightness of the air pressure pipeline is ensured, and the liquid storage tank 33 is preliminarily planned to be a 600LPE plastic water tank.
The liquid storage tank 32 is filled with water, and a liquid outlet of the liquid storage tank is connected with the organic glass tube 11 of the model box 10 through a high-pressure hose and a pipeline connector 13, so that the liquid pumped out of the liquid storage tank 32 can flow into the organic glass tube 11 of the model box 10, and a pressure reducing valve 35 is arranged on the section of the high-pressure hose. The reservoir 33 is connected to the other end of the plexiglass tube 11 via a pipe 34, so that the liquid flowing out of the plexiglass tube 11 of the mold box 10 can finally flow into the reservoir 33.
The soil body freezing mechanism is provided with a liquid nitrogen tank, a liquid nitrogen transmission pipe, a liquid nitrogen pump and the like, wherein the liquid nitrogen pump adopts a hand-pinch type liquid nitrogen pump which is arranged on the liquid nitrogen tank to pump out nitrogen. The liquid nitrogen transmission pipe is attached to the outer side of the organic glass pipe 11, one end of the liquid nitrogen transmission pipe is connected with a liquid nitrogen pump through a pipeline, and the pipe orifice of the other end of the liquid nitrogen transmission pipe is flush with the damaged orifice 12. The hand-pinch liquid nitrogen pump and the liquid nitrogen tank with the caliber of 50mm both adopt sizing products on the market, and the radius of a liquid nitrogen transmission pipe can be 20 mm. The interface of the liquid nitrogen transmission pipe is positioned above the pipeline interface 13 of the organic glass pipe 11 of the model box 10.
The PIV mechanism includes a PIV camera (pco.1200hs, image resolution 1280 × 1024, 130 ten thousand pixels, PIV frame interval time 70ns), which may be used as a PIV high definition camera, is located outside the model box 10, and is opposite to the organic glass tube 11, i.e., is parallel to the target surface (the soil around the semi-cylindrical organic glass tube 11). The control points are located on the side walls of the mold box 10.
And the processing software, the image analysis unit and the like of the PIV mechanism can adopt shaped products on the market and are used for acquiring displacement and coordinate images of soil bodies at the control points. The control points are made on the wall of the model box 10 by manpower and made of white paper (black solid dots are used as reference points and white solid dots are used as control points).
This water content detection mechanism is equipped with a plurality of sensors, sets up respectively around organic glass pipe 11. Specifically, 16 drive-free USB high-precision soil humidity sensors can be adopted and placed at different depths and different plane positions around the transparent PVC pipe in the model box 10 at intervals of ten centimeters. The device is connected with a computer through a USB connector, the intensity of soil bodies with different water contents is measured by matching with a geotechnical triaxial shearing instrument, a conversion relation between the intensity and the water content is established, and the intensity of the soil bodies at different positions around the soil cave is calculated by utilizing the conversion relation. The triaxial shear apparatus can adopt the following models: NJ43/SG1AG, Beijing, China, West, science and technology Co.
Adopt the utility model discloses the device simulates the operation that detects as follows:
(1) preparing a model box: the soil for test is filled to specified density layer by layer according to certain times
2.65g/cm3And the mold box 10 is filled, and the layers are scraped by a cutter and fully tamped to ensure that the density of the soil in the box is uniform.
(2) The pavement loading mechanism 20 is installed: the load plate 21 is placed over the mould box 10 soil. Two upright posts 24 of a reaction frame are arranged at two sides of the model box 10 and connected with a bottom plate 25 of the model box 10 through 4 steel L-shaped angle braces, and the two upright posts are symmetrically distributed at the left and right of the 4 angle braces; the bottom of the gear type invertible jack is connected with the bottom of the beam 23 of the reaction frame. The position of the top plate of the jack 22 is adjusted to ensure that the top plate of the jack 22 just contacts with the bearing iron plate.
(3) The water supply pressure mechanism 30 is installed: firstly, connecting an air press 31 with a high-pressure hose, wherein the high-pressure hose is connected with a lock catch ball valve through a 6-minute reducing two-way PE pipe with teeth and penetrates through 3 high-precision air pressure reducing valves and is connected with the center of a top cover of a liquid storage tank 32; a liquid outlet (provided with a valve) on the bottom plate at the lower end is connected with a high-pressure hose, is connected with a lock catch ball valve through a 6-minute reducing two-way PE pipe with teeth, and penetrates through 1 stainless steel branch pipe pressure reducing valve to be connected with a pipeline connector 13 of a model box 10; after assembly, the reservoir 32 is filled with water. The high-pressure hose is connected to a circular opening on the side wall of the model box 10 and is connected with the model box 10 through a plastic direct reducer union. The circular opening on the other side wall of the model box 10 is connected with a high-pressure hose through a plastic direct reducer union, and the high-pressure hose extends into the liquid storage tank 33, so that liquid flowing out of a pipeline in the model box 10 can finally flow into the liquid storage tank 33.
(4) The soil body freezes the installation of mechanism: the hand-pinch liquid nitrogen pump is arranged on a liquid nitrogen tank, a liquid nitrogen transmission pipe 40 is connected with an opening hole on one side of the model box 10 and extends into the model box 10 to be attached to the upper part of the organic glass tube 11, and the port of the liquid nitrogen transmission pipe 40 is positioned right above the damaged port 12 of the organic glass tube 11. The single-sided liquid nitrogen delivery tube 40 interface is located above the pipe interface 13.
(5) Pressure is applied by a gear type invertible jack, and water is injected into the organic glass tube 11 in the model box 10 from a liquid storage tank 32. The pressure reducing valve 35 will provide a different, steady pressure as an independent variable during water injection.
(6) After the control points with high quality are selected, the coordinates and the displacements of the control points at corresponding moments are obtained by analyzing the photos at different moments under different water pressures and adopting a multi-threshold center determining method. The PIV images were examined using the geopev program of MATLAB. In order to eliminate the error of the displacement of the soil body unit caused by the deformation of the shot picture, the correction is carried out by using the control point which is the point without displacement on the same observation surface. And comparing the obtained pixel coordinates with the actual coordinates of the known control points, calculating the displacement caused by the error, and correcting all soil body unit targets in the same analysis area. When the photos at different moments are analyzed, the pixel coordinates and the displacement of the soil body unit at the corresponding moment can be obtained; the PIV image tracks the position change of the soil particles according to the texture features of the soil particles, and the real displacement of the soil particles is obtained.
(7) Liquid nitrogen is added into the liquid nitrogen transmission pipe 40 by a hand-pinch liquid nitrogen pump, the freezing condition of the soil body around the crevasse is observed, and the liquid nitrogen is stopped when the edge of the soil cave is frozen and the rest soil body is in a normal state.
(8) Measuring the water content of the residual granite soil at different positions by using a humidity sensor; and (4) calculating the strength of the soil at different positions according to the relationship between the strength and the water content of the soil.
(9) And measuring four axes after the test is finished, wherein the four axes are respectively a relation curve of soil body displacement and time, a relation of soil body strength and time, a relation of water content and time and a relation of water content and soil body strength. A spatial three-dimensional model is established through a skinning method (3dmax software animation).
The above-mentioned be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.
Claims (8)
1. The utility model provides a simulator of road bed cavity model which characterized in that: the device comprises a model box, a pavement loading mechanism, a water supply pressure mechanism, a soil body freezing mechanism, a PIV mechanism and a water content detection mechanism; the top surface of the model box is provided with an opening, the interior of the model box is filled with a soil body to be observed and an organic glass tube, and the organic glass tube is provided with a damaged opening; the road surface loading mechanism is provided with a load plate, and the load plate is positioned on the top surface of the model box to apply pressure to a soil body to be tested; the water supply pressure mechanism is connected with the organic glass pipe to provide controllable stable pressure water; the soil body freezing mechanism is provided with a liquid nitrogen transmission pipe for providing nitrogen, the liquid nitrogen transmission pipe is attached to the outer side of the organic glass pipe, and the pipe orifice of the liquid nitrogen transmission pipe is flush with the damaged orifice; the PIV mechanism is used for acquiring displacement and coordinate images of soil at a control point; the water content detection mechanism is provided with a plurality of sensors which are respectively arranged around the organic glass tube.
2. The simulation apparatus of a roadbed void model as claimed in claim 1, wherein: the model box is provided with two pipeline interfaces opposite to the organic glass pipe, and the pipeline interfaces are communicated with the organic glass pipe and the water supply pressure mechanism.
3. The simulation apparatus of a roadbed void model as claimed in claim 1, wherein: the road surface loading mechanism also comprises a jack and a reaction frame; the model box is arranged at the bottom of the reaction frame; the jack is arranged on the top of the reaction frame and connected with the load plate.
4. A simulation apparatus of a roadbed void model according to claim 3, wherein: the reaction frame comprises a cross beam, a bottom plate and two upright columns; the jack is installed on the cross beam; the bottom plate is provided with the model box; the upright posts are connected between the cross beam and the bottom plate.
5. The simulation apparatus of a roadbed void model as claimed in claim 1, wherein: the water supply pressure mechanism comprises an air press, a liquid storage tank and a liquid storage tank; the air pressure machine is communicated with a liquid storage tank through a pipeline, and the liquid storage tank is communicated with one end of an organic glass tube through a pipeline; the liquid storage tank is communicated with the other end of the organic glass tube through a pipeline.
6. The simulation apparatus of a roadbed void model as claimed in claim 5, wherein: the water supply pressure mechanism also comprises a plurality of pressure reducing valves, and the pressure reducing valves are arranged on the pipeline.
7. The simulation apparatus of a roadbed void model as claimed in claim 1, wherein: the soil body freezing mechanism is also provided with a liquid nitrogen pump which is communicated with the liquid nitrogen transmission pipe; the liquid nitrogen transmission pipe is positioned right above the organic glass pipe.
8. The simulation apparatus of a roadbed void model as claimed in claim 1, wherein: the PIV mechanism comprises a PIV camera, an image analysis unit and a control point, and the PIV camera is positioned outside the model box and is opposite to the organic glass tube; the control point is arranged on the side wall of the model box.
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| CN201920548656.5U CN210091528U (en) | 2019-04-22 | 2019-04-22 | Simulation device for roadbed cavity model |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109920318A (en) * | 2019-04-22 | 2019-06-21 | 华侨大学 | A kind of simulator of roadbed Void Model |
| CN111622277A (en) * | 2020-06-01 | 2020-09-04 | 浙江大学 | Test device and test method for simulating influence of pile end cavities on bearing performance of pile foundation |
| CN111964640A (en) * | 2020-08-15 | 2020-11-20 | 海南海玻工程玻璃有限公司 | Glass detection device |
-
2019
- 2019-04-22 CN CN201920548656.5U patent/CN210091528U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109920318A (en) * | 2019-04-22 | 2019-06-21 | 华侨大学 | A kind of simulator of roadbed Void Model |
| CN109920318B (en) * | 2019-04-22 | 2024-02-02 | 华侨大学 | Simulator of roadbed cavity model |
| CN111622277A (en) * | 2020-06-01 | 2020-09-04 | 浙江大学 | Test device and test method for simulating influence of pile end cavities on bearing performance of pile foundation |
| CN111964640A (en) * | 2020-08-15 | 2020-11-20 | 海南海玻工程玻璃有限公司 | Glass detection device |
| CN111964640B (en) * | 2020-08-15 | 2021-10-08 | 海南海玻工程玻璃有限公司 | Glass detection device |
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