CN219100149U - Pile foundation model test device - Google Patents
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- CN219100149U CN219100149U CN202223036645.XU CN202223036645U CN219100149U CN 219100149 U CN219100149 U CN 219100149U CN 202223036645 U CN202223036645 U CN 202223036645U CN 219100149 U CN219100149 U CN 219100149U
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Abstract
The application relates to a pile foundation model test device relates to the technical field of pile foundation indoor detection, including test bench and test box, the test soil has been filled to the test box intussuseption, buries the test stake in the test soil, is provided with the adjustment mechanism who is used for adjusting the moisture content in the test soil on the test bench, and adjustment mechanism includes water storage tank, water injection pipe, moisture detector and adjusting part. The water content in the test soil is detected by the water detector, when the water content is insufficient, the test water enters the test soil through the water injection pipe, the water level in the test soil is adjusted through the adjusting component, the water content in the test soil after the test water is added is close to an actual construction site, then the test pile is subjected to simulated loading, the bearing performance of the test pile is measured, the water content in the test soil is close to the soil water content in the actual construction site through the injection of the test water, and the accuracy of a pile foundation model test is improved.
Description
Technical Field
The application relates to the technical field of pile foundation indoor detection, in particular to a pile foundation model test device.
Background
In order to study the mechanical properties of pile foundations, technicians usually adopt an indoor simulation mode, a concrete pile with reduced equal proportion is buried in soil in a model box as a model pile, various loads are applied to the model pile, parameters such as vertical displacement and horizontal displacement of the pile body under different load modes and stress strain values of different depth measuring points of the pile body are measured, so that a model is built, the working mechanism and the stress performance of the model pile are comprehensively analyzed, and a basis is provided for subsequent practical construction and design application.
The test pile is embedded in the test box, then vertical and horizontal forces are respectively applied to the test pile through the simulation loading device, when the test pile is displaced, the displacement and the tensile force of the test pile are measured through the measuring device, and stress strain values of different depth measuring points are obtained through stress changes of the pile body, so that the horizontal critical bearing capacity and the ultimate bearing capacity of the single pile are measured.
In karst areas, the underground water content is large, so that the water content in the soil is high, the lateral resistance between the pile foundation and the soil layer can be changed, but the test soil is usually obtained locally and is different from the water content in the underground soil of the actual construction site, so that errors exist in data obtained by a model test, and the accuracy of the pile foundation model test is reduced.
Disclosure of Invention
In order to improve the accuracy of pile foundation model test, this application provides a pile foundation model test device.
The application provides a pile foundation model test device adopts following technical scheme:
the utility model provides a pile foundation model test device, includes the test bench and sets up the test box on the test bench, the test soil has been filled to the test box intussuseption, buried test stake in the test soil, be provided with the adjustment mechanism that is used for adjusting the moisture content in the test soil on the test bench, adjustment mechanism includes:
the water storage tank is arranged on the test bed, and test water is filled in the water storage tank;
the water injection pipe is arranged on the water storage tank and communicated with the interior of the water storage tank, and is connected with the test box and used for pouring test water into the test box;
the moisture detector is buried in the test soil and is used for detecting the moisture content in the test soil;
and the adjusting component is arranged on the water injection pipe and connected with the test box and used for adjusting the groundwater level in a simulation manner.
Through adopting above-mentioned technical scheme, moisture detector detects the moisture content in the test soil, and when moisture content was not enough, test water was passed through the water injection pipe and was got into in the test soil, adjusts the water level in the test soil through adjusting component for the moisture content in the test soil after adding test water is close to actual construction scene, then carries out the simulation loading to the test stake, measures the load-carrying capacity of test stake, makes the moisture content of test soil be close to actual construction scene's soil moisture content through injecting test water, with this accuracy that improves pile foundation model test.
Optionally, be provided with the display scale that is used for showing experimental soil height on the test chamber, adjusting part includes:
the plurality of adjusting pipes are arranged on the water injection pipe at intervals, are connected with the test box and are used for pouring test water;
the control valves are arranged in a plurality of mode and correspond to the adjusting pipes one by one, and the control valves are arranged on the adjusting pipes and used for controlling the opening and closing of the adjusting pipes.
Through adopting above-mentioned technical scheme, the display ruler shows the height of experimental soil, the corresponding high governing pipe of water level height selection according to needs simulation, pour into corresponding volume's experimental water in the water storage tank, then open the control valve of corresponding altitude governing pipe, experimental water gets into experimental soil after through water injection pipe and governing pipe, after the numerical value of moisture detector is stable, can begin to simulate the loading to experimental stake, through governing pipe cooperation control valve for the added water level height is high unanimous with the water level height that needs simulation, with this error that reduces pile foundation simulation test, thereby improve pile foundation model test's accuracy.
Optionally, be provided with the display mechanism that is used for showing experimental stake displacement on the test chamber, display mechanism includes:
the fixing plate is arranged on the test box and used for simulating the ground, and a position avoiding hole for the test pile to pass through is formed in the fixing plate;
the display component is arranged on the fixed plate, is connected with the test pile and is used for displaying the displacement of the test pile.
By adopting the technical scheme, the test pile is simulated and loaded, and when the test pile generates displacement, the displacement value of the test pile is obtained through the display component, so that the convenience of displacement reading in the pile foundation model test process is improved; meanwhile, the test pile is limited through the fixing plate, so that the probability of error occurrence of test data caused by deviation of the embedded position of the test pile is reduced, and the accuracy of pile foundation model test is improved.
Optionally, the display assembly includes:
the horizontal ruler is arranged on the fixing plate along the diameter direction of the test pile;
the vertical ruler is arranged on the fixed plate along the length direction of the test pile;
the pointer, the pointer is provided with two sets of, and two sets of the pointer all sets up on experimental stake and directional horizon rule and vertical rule respectively.
Through adopting above-mentioned technical scheme, test stake emergence displacement, the pointer moves the emergence displacement to test stake, and the change of pointing numerical value on the level bar through the pointer obtains the horizontal displacement of test stake, and the change of pointing numerical value on the vertical chi through the pointer obtains the vertical displacement of test stake to this has improved the convenience that test stake level and vertical displacement read, has so improved the efficiency of pile foundation model test.
Optionally, the fixed plate can be dismantled and set up on the test chamber, be provided with the locating component that is used for carrying out the location to the fixed plate on the test chamber.
Through adopting above-mentioned technical scheme, open locating component, then can dismantle the fixed plate, then change experimental soil, perhaps wash the test box to improved experimental soil and changed the convenience, with this efficiency that has improved pile foundation model test.
Optionally, the positioning assembly includes:
the positioning plate is arranged on the fixed plate, and is slidably arranged on the test box and can be taken down from the test box;
the positioning screw rod penetrates through the positioning plate and the test box;
the positioning nut is in threaded connection with the positioning screw rod and abuts against the test box.
Through adopting above-mentioned technical scheme, rotate set nut and break away from the set screw, take off the set screw, stir the locating plate and shift out the test box, then can change the locating plate, or clear up the test box, during the installation, slide the locating plate for the fixed plate is contradicted on experimental soil, passes locating plate and test box with the set screw, rotate set nut and support tightly on the test box, with this dismantlement of realizing the fixed plate is changed and the installation location, consequently, the convenience that the change was dismantled with the installation location to the fixed plate has been improved, with this efficiency that has improved pile foundation model test.
Optionally, be provided with the stop gear who is used for carrying out spacing to experimental stake on the fixed plate, stop gear includes:
the limiting plate is arranged on the fixed plate in a sliding manner and is abutted against the test pile;
the limiting assembly is arranged on the fixed plate, is connected with the limiting plate and is used for adjusting the position of the limiting plate.
By adopting the technical scheme, during installation, the position of the limiting plate is adjusted through the limiting assembly, so that the limiting plate is abutted against the test pile, and the installation position of the test pile is limited, thereby reducing the probability of position deviation when the test pile is buried; after the test pile is buried, the position of the limiting plate is adjusted through the limiting assembly, so that the limiting plate is far away from the test pile, the probability that the limiting plate influences the distance of the displacement direction of the test pile is reduced, the probability of occurrence of errors of a pile foundation model test is reduced, and the accuracy of the pile foundation model test is improved.
Optionally, the limiting assembly includes:
the limiting screw is rotationally arranged on the limiting plate and is in threaded connection with the fixing plate;
the limiting disc is arranged on the limiting screw rod and is convenient to rotate, force is applied to the limiting disc, and the fixing plate is provided with a containing groove for containing the limiting plate.
By adopting the technical scheme, the rotation limiting plate borrows force, the rotation limiting plate drives the limiting screw to rotate, and the limiting screw rotates to drive the limiting plate to be far away from the test pile until the limiting plate moves into the accommodating groove to be accommodated, so that the probability that the limiting plate has adverse effect on displacement change in a test pile simulation test is reduced; during installation, the limiting screw is rotated to enable the limiting plate to be abutted against the test pile, so that the installation of the test pile is guided and limited, the probability of position deviation when the test pile is buried is reduced, and the accuracy of pile foundation model test is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
the water content in the test soil is detected by the water detector, when the water content is insufficient, the test water enters the test soil through the water injection pipe, the water level in the test soil is adjusted through the adjusting component, the water content in the test soil after the test water is added is close to an actual construction site, then the test pile is subjected to simulated loading, the bearing performance of the test pile is measured, the water content in the test soil is close to the soil water content in the actual construction site through the injection of the test water, and the accuracy of a pile foundation model test is improved.
Drawings
FIG. 1 is a schematic overall structure of the present application;
FIG. 2 is a schematic illustration of the structure of the conditioning assembly of the present application, with the test chamber in section;
FIG. 3 is a schematic view of the positioning assembly and spacing mechanism of the present application;
FIG. 4 is a schematic view of the structure of the display assembly of the present application, with the test chamber and test soil being sectioned.
Reference numerals: 1. a test bed; 11. a test chamber; 111. displaying a ruler; 12. testing soil; 13. testing piles; 14. a control board; 15. a display screen; 2. an adjusting mechanism; 21. a water storage tank; 211. a water inlet pipe; 212. a liquid level sensor; 22. a water injection pipe; 23. a moisture detector; 24. an adjustment assembly; 241. an adjusting tube; 242. a control valve; 3. a display mechanism; 31. a fixing plate; 311. a clearance hole; 312. a limiting ring; 313. a receiving groove; 32. a display assembly; 321. a level bar; 322. a vertical ruler; 323. a pointer; 4. a positioning assembly; 41. a positioning plate; 42. positioning a screw; 43. positioning a nut; 5. a limiting mechanism; 51. a limiting plate; 52. a limit component; 521. a limit screw; 522. and a limiting disc.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-4.
The type of the liquid level sensor 212 in the embodiment of the present application is MIK-P260, and the type of the moisture detector 23 is PHT-104.
The embodiment of the application discloses a pile foundation model test device.
Referring to fig. 1 and 2, a pile foundation model test device comprises a test bed 1 and a test box 11 arranged on the test bed 1, wherein the test box 11 is fixedly arranged on the upper surface of the test bed 1, the top end of the test box 11 is in an open state, test soil 12 is filled in the test box 11, test piles 13 are buried in the test soil 12, the test piles 13 are in a vertical state, and the top end of each test pile is positioned above the test soil 12; be provided with the adjustment mechanism 2 that is arranged in adjusting the moisture content in the test soil 12 on the test bench 1, the simulation loading device that test stake 13 adopted is ripe prior art, and the description is not in addition given in this application embodiment.
Referring to fig. 1 and 2, the two opposite outer side walls of the test box 11 are fixedly provided with display scales 111 for displaying the height of the test soil 12, the two display scales 111 are in a vertical state, the test box 11 is provided with a display mechanism 3 for displaying the displacement of the test pile 13, the display mechanism 3 comprises a fixed plate 31, the fixed plate 31 is detachably arranged on the test box 11, the fixed plate 31 is used for simulating the ground and is abutted against the upper surface of the test soil 12, the fixed plate 31 is provided with a avoidance hole 311 for the passage of the test pile 13, and the diameter of the avoidance hole 311 is larger than that of the test pile 13; the test chamber 11 is provided with a positioning assembly 4 for positioning the fixing plate 31.
Referring to fig. 1 and 2, the positioning assembly 4 includes two positioning plates 41, positioning screws 42 and positioning nuts 43, the two positioning plates 41 are provided, the two positioning plates 41 are fixedly mounted on two opposite outer side walls of the fixing plate 31, the two positioning plates 41 are in vertical states, and the two positioning plates 41 are vertically slidably mounted on two opposite inner side walls of the test chamber 11 and can be removed from the test chamber 11.
Referring to fig. 2 and 3, the positioning screws 42 are provided with two sets and are in one-to-one correspondence with the positioning plates 41, and the following description will be made by taking only one set of positioning screws 42 as an example; each set of positioning screws 42 comprises two positioning screws 42, and each positioning screw 42 horizontally penetrates through the positioning plate 41 and the test box 11; the positioning nuts 43 are provided with four positioning screws 42 in one-to-one correspondence, and the positioning nuts 43 are in threaded connection with the positioning screws 42 and abut against the outer side wall of the test chamber 11 for positioning.
Referring to fig. 2 and 3, a limiting mechanism 5 for limiting the test pile 13 is arranged on the fixing plate 31, the limiting mechanism 5 comprises a limiting plate 51 and a limiting assembly 52, a limiting ring 312 is fixedly arranged on the upper surface of the fixing plate 31, and the inner side wall of the limiting ring 312 is flush with the inner wall of the avoidance hole 311.
Referring to fig. 2 and 3, a plurality of limiting plates 51 are circumferentially arrayed around the axis of the limiting ring 312, the plurality of limiting plates 51 are slidably mounted on the inner side wall of the limiting ring 312 along the diameter direction of the limiting ring 312, the projection of the limiting plates 51 in the vertical direction is arc-shaped, and the plurality of limiting plates 51 are abutted against the outer side wall of the test pile 13, so that the mounting direction of the test pile 13 is guided and limited; the inner side wall of the limit ring 312 is provided with a plurality of accommodating grooves 313 for accommodating the limit plates 51, and the accommodating grooves 313 are in one-to-one correspondence with the limit plates 51.
Referring to fig. 2 and 3, the limiting assemblies 52 are disposed on the fixed plate 31 and connected with the limiting plates 51 for adjusting the positions of the limiting plates 51, and the limiting assemblies 52 are disposed in a plurality of positions and in one-to-one correspondence with the limiting plates 51, and only one limiting assembly 52 will be described below as an example.
Referring to fig. 2 and 3, the limiting assembly 52 includes a limiting screw 521 and a limiting plate 522, the limiting screw 521 is horizontally rotatably installed on an outer sidewall of the limiting plate 51 near the limiting ring 312, and the limiting screw 521 is threadedly connected to the limiting ring 312; the limiting disc 522 is fixedly arranged at one end, far away from the limiting plate 51, of the limiting screw 521, and the limiting disc 522 facilitates force borrowing when the limiting screw 521 rotates.
Referring to fig. 1 and 4, the adjusting mechanism 2 comprises a water storage tank 21, a water injection pipe 22, a moisture detector 23 and an adjusting assembly 24, wherein the water storage tank 21 is fixedly arranged on the upper surface of the test stand 1, the lower surface of the water storage tank 21 is positioned above the upper surface of the test stand 11, a water inlet pipe 211 is fixedly arranged on the upper surface of the water storage tank 21, and the water inlet pipe 211 is communicated with the water storage tank 21 and used for pouring test water; a liquid level sensor 212 for displaying the liquid level of the test water is fixedly arranged on the outer side wall of the water storage tank 21.
Referring to fig. 1 and 4, two water injection pipes 22 are provided, the two water injection pipes 22 are respectively fixedly installed on two opposite outer side walls of the water storage tank 21, two ends of the water injection pipes 22 are respectively communicated with the water storage tank 21 and the test box 11, and the water injection pipes 22 are used for pouring test water into the test soil 12; the moisture detectors 23 are arranged in a plurality of arrays around the circumference of the test pile 13, the moisture detectors 23 are buried in the test soil 12 and used for detecting the moisture content in the test soil 12, the moisture detectors 23 are buried together when the test soil 12 is buried, and a plurality of groups of moisture detectors 23 can be buried at different heights according to test requirements; the control board 14 and the display screen 15 are fixedly arranged on the outer side wall of the test stand 1, the moisture detector 23 is electrically connected with the control board 14, and the display screen 15 is electrically connected with the control board 14.
Referring to fig. 1 and 4, the adjusting assemblies 24 are disposed on the water injection pipe 22 and connected to the test chamber 11 for analog adjustment of the groundwater level, and the adjusting assemblies 24 are disposed in two groups and are in one-to-one correspondence with the water injection pipe 22, and only one group of adjusting assemblies 24 will be described below as an example.
Referring to fig. 2 and 4, the adjusting assembly 24 includes a plurality of adjusting pipes 241 and a control valve 242, the plurality of adjusting pipes 241 are fixedly installed on the water injection pipe 22 at intervals along the length direction of the water injection pipe 22, and the plurality of adjusting pipes 241 are all in a horizontal state and extend into the test chamber 11 and are located below the fixing plate 31.
Referring to fig. 1 and 4, the control valve 242 is provided in plurality and in one-to-one correspondence with the adjustment pipe 241, and the control valve 242 is installed on the adjustment pipe 241 and is used for controlling the opening and closing of the adjustment pipe 241; when the moisture content of the test soil 12 needs to be regulated, calculating required test water according to the soil height, pouring the corresponding test water into the water storage tank 21, opening a control valve 242 with the corresponding height according to the height of the test soil 12, and allowing the test water to enter the test soil 12 after passing through the water injection pipe 22 and the regulating pipe 241 under the action of self gravity; the moisture detector 23 detects the moisture content in the test soil 12, and transmits the detected value to the control board 14, and the detected value is displayed through the display screen 15, and after the value of the moisture detector 23 is stable, the simulated loading test can be performed on the test pile 13.
Referring to fig. 1 and 3, the display mechanism 3 further includes a display assembly 32, the display assembly 32 being disposed on the fixed plate 31 and connected to the test stake 13 for displaying the displacement of the test stake 13, the display assembly 32 including a level bar 321, a vertical bar 322 and a pointer 323; the level bars 321 are provided with two, and two level bars 321 are all fixed mounting on stop collar 312 upper surface, and two level bars 321 all are the horizontality and towards two locating plates 41 respectively, and the length direction coincidence of two level bars 321.
Referring to fig. 3 and 4, two vertical scales 322 are provided, the two vertical scales 322 are fixedly installed on the upper surface of the limiting ring 312, the two vertical scales 322 are in a vertical state and are positioned at two sides of the avoidance hole 311, and the connecting line direction of the two vertical scales 322 is perpendicular to the connecting line direction of the two horizontal scales 321; the pointers 323 are provided with two groups and correspond to the level bars 321 and the vertical bars 322 respectively, each group of pointers 323 comprises two pointers 323, four pointers 323 are fixedly mounted on the upper surface of the limiting ring 312, the four pointers 323 are in a horizontal state, the four pointers 323 are symmetrical around the axis of the limiting ring 312, wherein the two pointers 323 point to the two level bars 321, and the other two pointers 323 point to the two vertical bars 322.
The working principle of the embodiment of the application is as follows:
when the moisture content of the test soil 12 needs to be regulated, calculating required test water according to the soil height, pouring the corresponding test water into the water storage tank 21, opening a control valve 242 with the corresponding height according to the height of the test soil 12, and allowing the test water to enter the test soil 12 after passing through the water injection pipe 22 and the regulating pipe 241 under the action of self gravity; the moisture detector 23 detects the moisture content in the test soil 12, transmits the detected value to the control panel 14, and simultaneously displays the detected value through the display screen 15, after the value of the moisture detector 23 is stable, the limiting screw 521 is rotated to enable the limiting plate 51 to be separated from the test pile 13 and move into the accommodating groove 313, then the test pile 13 can be subjected to a simulated loading test, and the displacement of the test pile 13 is obtained through the change of the pointer 323 on the horizontal ruler 321 and the vertical ruler 322; the water content of the test soil 12 is made to approach the soil water content of the actual construction site by injecting the test water, so that the accuracy of the pile foundation model test is improved.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (8)
1. The utility model provides a pile foundation model test device, includes test bench (1) and sets up test box (11) on test bench (1), test soil (12) are filled to test box (11) intussuseption, test pile (13) have been buried in test soil (12), its characterized in that: be provided with on test bench (1) and be used for adjusting the adjustment mechanism (2) of the moisture content of experimental soil (12), adjustment mechanism (2) include:
a water storage tank (21), wherein the water storage tank (21) is arranged on the test bed (1), and test water is filled in the water storage tank (21);
a water injection pipe (22), wherein the water injection pipe (22) is arranged on the water storage tank (21) and is connected with the water storage tank (21), and the water injection pipe (22) is connected with the test box (11) and is used for filling test water into the test box (11);
a moisture detector (23), the moisture detector (23) being embedded in the test soil (12) and being configured to detect a moisture content in the test soil (12);
and the adjusting assembly (24) is arranged on the water injection pipe (22) and is connected with the test box (11) and used for simulating and adjusting the groundwater level.
2. The pile foundation model testing device of claim 1, wherein: be provided with on the test chamber (11) and be used for showing the display chi (111) of test soil (12) height, adjusting part (24) include:
a plurality of adjusting pipes (241), wherein the adjusting pipes (241) are arranged on the water injection pipe (22) at intervals, are connected with the test box (11) and are used for pouring test water;
the control valves (242) are arranged in a plurality of mode and are in one-to-one correspondence with the adjusting pipes (241), and the control valves (242) are arranged on the adjusting pipes (241) and are used for controlling the opening and closing of the adjusting pipes (241).
3. The pile foundation model testing device of claim 1, wherein: the test box (11) is provided with a display mechanism (3) for displaying the displacement of the test pile (13), and the display mechanism (3) comprises:
the fixing plate (31), the fixing plate (31) is arranged on the test box (11) and used for simulating the ground, and the fixing plate (31) is provided with a clearance hole (311) for the test pile (13) to pass through;
and the display assembly (32) is arranged on the fixed plate (31) and is connected with the test pile (13) and used for displaying the displacement of the test pile (13).
4. A pile foundation model test device according to claim 3, characterized in that: the display assembly (32) includes:
the horizontal ruler (321) is arranged on the fixed plate (31) along the diameter direction of the test pile (13);
the vertical ruler (322) is arranged on the fixed plate (31) along the length direction of the test pile (13);
the pointer (323), pointer (323) are provided with two sets of, and two sets of pointer (323) all set up on experimental stake (13) and point to horizon rule (321) and vertical chi (322) respectively.
5. A pile foundation model test device according to claim 3, characterized in that: the fixing plate (31) is detachably arranged on the test box (11), and a positioning assembly (4) for positioning the fixing plate (31) is arranged on the test box (11).
6. The pile foundation model testing device of claim 5, wherein: the positioning assembly (4) comprises:
the positioning plate (41) is arranged on the fixed plate (31), and the positioning plate (41) is slidably arranged on the test box (11) and can be removed from the test box (11);
a positioning screw (42), the positioning screw (42) passing through the positioning plate (41) and the test chamber (11);
and the positioning nut (43) is in threaded connection with the positioning screw (42) and abuts against the test box (11).
7. A pile foundation model test device according to claim 3, characterized in that: be provided with on fixed plate (31) and be used for carrying out spacing stop gear (5) to experimental stake (13), stop gear (5) include:
the limiting plate (51) is arranged on the fixed plate (31) in a sliding manner and is abutted against the test pile (13);
and the limiting assembly (52) is arranged on the fixed plate (31) and is connected with the limiting plate (51) and used for adjusting the position of the limiting plate (51).
8. The pile foundation model testing device of claim 7, wherein: the spacing assembly (52) includes:
the limiting screw (521) is rotatably arranged on the limiting plate (51) and is in threaded connection with the fixed plate (31);
the limiting disc (522), the limiting disc (522) is arranged on the limiting screw (521) and is convenient for borrow power when rotating, and the holding groove (313) for holding the limiting plate (51) is formed in the fixed plate (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223036645.XU CN219100149U (en) | 2022-11-15 | 2022-11-15 | Pile foundation model test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223036645.XU CN219100149U (en) | 2022-11-15 | 2022-11-15 | Pile foundation model test device |
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| Publication Number | Publication Date |
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| CN219100149U true CN219100149U (en) | 2023-05-30 |
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| CN202223036645.XU Active CN219100149U (en) | 2022-11-15 | 2022-11-15 | Pile foundation model test device |
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| CN (1) | CN219100149U (en) |
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