A shallow plate load test device

Abstract

The present application discloses a shallow plate load test device, which relates to the technical field of load test devices and includes a reaction force device. The reaction force device includes a support frame, a bottom plate, a surrounding plate, a pressing plate, and a driving component; the support frame is arranged on the ground, and an installation space is formed between the support frame and the ground, and the bottom plate is arranged on the top of the support frame; there are multiple surrounding plates which are arranged on the top of the support frame, and the surrounding plates surround the bottom plate along the circumferential direction to form a storage cavity for storing soil; the pressing plate slides up and down in the storage cavity, and the driving component is arranged on the support frame, and the driving component drives the pressing plate to press the soil in the storage cavity; a rigid plate is arranged on the ground and located in the installation space; a jack is arranged between the rigid plate and the support frame, and the upper and lower ends of the jack respectively abut against the support frame and the rigid plate; there are multiple measuring components which are respectively arranged on the jack and the rigid plate. The present application can conveniently construct a reaction force device during the load test.

Description

Technical Field

[0001] This application relates to the technical field of load test equipment, and in particular to a shallow plate load test equipment. Background Art

[0002] The shallow plate load test is to install a rigid plate with a certain size and geometric shape on the bearing stratum of the foundation to be measured on the building site; then a support platform is erected directly above the rigid plate, and heavy objects such as stones are stacked on the platform; then an oil pressure-driven jack is placed between the support platform and the rigid plate, and measuring devices for displacement measurement and pressure measurement are set up.

[0003] At the beginning of the test, the jack is driven to support the support platform. At this time, the support platform and the heavy objects on it form a reaction device to limit the jack, so that the jack forms a reaction force acting on the rigid plate, simulating the state of the ground under load; then the change values of the ground under different loads on the rigid plate and the oil pressure change of the jack are measured by each measuring device, and the state of the ground can be analyzed according to the change values.

[0004] However, it is found during the test that there are few regularly shaped heavy objects around the test site that can be stacked to form a reaction device. Therefore, it is necessary to transport additional stackable heavy objects to form a reaction device during the test, which is rather troublesome. Summary of the Invention

[0005] In order to facilitate the construction of a reaction device during a load test, this application provides a shallow plate load test equipment.

[0006] This application provides a shallow plate load test equipment, adopting the following technical solutions:

[0007] A shallow plate load test equipment, comprising

[0008] A reaction device, the reaction device includes a support frame, a bottom plate, a surrounding plate, a pressing plate and a driving component;

[0009] The support frame is arranged on the ground, and an installation space is formed between the support frame and the ground, and the bottom plate is arranged on the top of the support frame;

[0010] There are multiple surrounding plates arranged on the top of the support frame, and the surrounding plates surround the bottom plate in a circumferential direction to form a storage cavity for storing soil;

[0011] The pressing plate slides up and down in the storage cavity, the driving component is arranged on the support frame, and the driving component drives the pressing plate to extrude the soil in the storage cavity;

[0012] A rigid plate, arranged on the ground and located in the installation space;

[0013] A jack is provided between the rigid plate and the support frame, and the upper and lower ends of the jack respectively abut against the support frame and the rigid plate.

[0014] Measuring components, there are multiple of them and they are respectively arranged on the jack and the rigid plate.

[0015] By adopting the above technical solution, when installing the shallow plate load test equipment, the storage cavity is filled with soil, and then the extrusion plate is driven by the driving component to squeeze the soil downward to improve the compactness of the soil. Then, the soil is continuously filled and compacted so that the soil provides load for the reaction device; at the same time, the soil is easy to obtain at the test site, which is convenient for constructing the reaction device. When there are no regular stones at the test site to provide load for the reaction device, there is no need to transport stones to the test site additionally, which greatly reduces the complexity and difficulty of the test.

[0016] Optionally, the driving component includes a driving lead screw, a connecting column, a driving shaft, a transmission bevel gear, a connecting bevel gear and a driving motor.

[0017] The driving lead screws are symmetrically arranged and are respectively rotatably connected to the opposite sides of the enclosure plate.

[0018] The connecting column connects the driving lead screw and the extrusion plate. The connecting column is threadedly connected to the driving lead screw. When the driving lead screw rotates, the connecting column drives the extrusion plate to move upward or downward.

[0019] The driving shaft is rotatably connected to the bottom plate. The transmission bevel gears are symmetrically arranged and are respectively located at both ends of the driving shaft. The connecting bevel gear is arranged at the bottom of the driving lead screw, and the connecting bevel gear meshes with the transmission bevel gear.

[0020] The driving motor is arranged on the support frame, and the rotating shaft of the driving motor is connected to the driving shaft.

[0021] By adopting the above technical solution, the driving motor drives the driving shaft to rotate, so that the transmission bevel gear drives the driving lead screw to rotate through the connecting bevel gear, realizing the up and down movement of the extrusion plate and facilitating the compaction of the soil.

[0022] Optionally, the connecting column includes a connecting block, a limiting block and a column body.

[0023] One end of the column body is fixed to the top of the extrusion plate, and the other end is formed with a connecting groove. The connecting block slides up and down and rotates in the connecting groove, and the connecting block is threadedly connected to the driving lead screw.

[0024] The limiting block is arranged on the outer peripheral side of the connecting block. The connecting block forms a limiting groove communicating with the connecting groove. The limiting block slides up and down in the limiting groove. The connecting block is circumferentially formed with a sliding groove for the limiting block to slide. The sliding groove communicates with the limiting groove and the connecting groove.

[0025] By adopting the above technical solution, the connecting column and the driving screw rod are detachably connected, which is convenient for disassembling and removing the extrusion plate, and reduces the difficulty of filling the soil in the storage cavity.

[0026] Optionally, the extrusion plate includes a frame and a pushing plate;

[0027] The frame is connected to the connecting column. An opening is formed in the middle of the frame. The pushing plates are symmetrically arranged and slide in the frame. When the opposite pushing plates are in contact with each other, the opening is closed.

[0028] By adopting the above technical solution, when the pushing plate slides out of the frame, the opening can be opened, further reducing the difficulty of filling the soil in the storage cavity.

[0029] Optionally, the frame is formed with an installation groove for the pushing plate to slide. The frame includes a blocking block located in the installation groove. The pushing plate is formed with a blocking groove. When the opposite pushing plates are in contact with each other, the blocking block is snapped into the blocking groove.

[0030] By adopting the above technical solution, the blocking block is snapped into the blocking groove, which is beneficial to restricting the position of the pushing plate. After the pushing plate seals the opening, the possibility of the pushing plate contacting the surrounding plate when entering the storage cavity is reduced.

[0031] Optionally, the reaction force device includes a fixing strip and a fixing pin;

[0032] The fixing strip corresponds to the surrounding plate one by one and is arranged on the top of the bottom plate. The bottom of the surrounding plate is formed with a fixing groove for the fixing strip to be inserted;

[0033] The surrounding plate includes a long plate and a short plate. The long plates are arranged oppositely. The short plates are symmetrically arranged between the opposite long plates. The fixing pin penetrates through the long plate. The short plate is formed with a pin slot for the fixing pin to be inserted.

[0034] By adopting the above technical solution, the long plate and the short plate are detachably connected, which is convenient for carrying and transporting the load test equipment.

[0035] Optionally, the reaction force device further includes a connecting chain. Both ends of the connecting chain are respectively connected to the surrounding plate and the bottom plate.

[0036] By adopting the above technical solution, the long plate and the short plate are connected to the bottom plate, reducing the possibility of the long plate and the short plate being lost.

[0037] Optionally, the reaction force device further includes a connecting cable and a fixing column;

[0038] There are multiple fixing columns which are respectively fixed on the ground. One end of the connecting cable is connected to the fixing column, and the other end is connected to the support frame.

[0039] By adopting the above technical solution, the fixing column pulls the support frame through the connecting cable, improving the installation stability of the support frame.

[0040] In summary, the present application includes at least one of the following beneficial effects:

[0041] 1. By filling the storage cavity with soil and compacting the soil through the pressing plate, the soil can provide a large load for the reaction force device to exert a reaction force on the jack. At the same time, the soil is easy to obtain, greatly reducing the construction difficulty of the reaction force device during the test;

[0042] 2. The enclosure is detachable, facilitating the carrying and transportation of the load test equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is the overall structural schematic diagram of the first embodiment of the present application;

[0044] Figure 2 is the internal cross-sectional schematic diagram of the first embodiment of the present application;

[0045] Figure 3 is Figure 2 the enlarged schematic diagram of part A of

[0046] Figure 4 is the structural schematic diagram of the pressing plate in the first embodiment of the present application;

[0047] Figure 5 is Figure 4 the enlarged schematic diagram of part B of

[0048] Figure 6 is the schematic diagram of the connection structure between the long plate and the short plate in the second embodiment of the present application;

[0049] Figure 7 is the cross-sectional schematic diagram of the second embodiment of the present application.

[0050] Reference numerals: 1, reaction force device; 11, support frame; 12, bottom plate; 13, enclosing plate; 131, long plate; 132, short plate; 133, fixing groove; 14, extrusion plate; 141, frame; 142, push plate; 143, open port; 144, installation groove; 145, stop block; 146, stop groove; 15, storage cavity; 16, fixing pin; 17, fixing strip; 18, connecting chain; 19, fixing column; 191, connecting cable; 2, driving lead screw; 21, connecting column; 211, connecting block; 212, limiting block; 213, column body; 2131, connecting groove; 2132, limiting groove; 2133, sliding groove; 22, driving shaft; 23, transmission helical gear; 24, connecting helical gear; 25, driving motor; 3, installation space; 4, rigid plate; 5, jack; 6, measuring piece. Detailed implementation mode

[0051] The following will Figures 1-7 make a further detailed description of this application.

[0052] The embodiment of this application discloses a shallow plate load test device.

[0053] Embodiment 1

[0054] Refer to Figure 1 , the shallow plate load test device includes a reaction force device 1, a rigid plate 4, a jack 5 and a measuring piece 6.

[0055] The reaction force device 1 is arranged on the ground, and there is an installation space 3 between the reaction force device 1 and the ground. The rigid plate 4 can be a circular plate-shaped structure or a square plate-shaped structure. The rigid plate 4 is placed in the installation space 3 and on the ground, and the rigid plate 4 is directly opposite to the center of gravity of the reaction force device 1. The jack 5 is a hydraulically driven jack 5. The jack 5 is located in the installation space 3 and placed on the top of the rigid plate 4. The top of the jack 5 abuts against the reaction force device 1, and the bottom abuts against the rigid plate 4.

[0056] There are multiple measuring components 6, including a hydraulic pressure gauge for measuring hydraulic pressure, a dial indicator for measuring displacement, etc.; the reaction force device 1 further includes a support beam in an inverted "U" shape structure. The support beam passes through the installation space 3 and both ends are located at positions away from the installation space 3. Clamping columns are integrally formed on the support beam, and the measuring component 6 is fixed on the support beam through the clamping columns. The measuring component 6 is connected according to the measurement object. For example, the hydraulic pressure gauge for measuring hydraulic pressure is connected to the jack 5, and the dial indicator for measuring displacement is connected to the rigid plate 4. When the hydraulic pressure drives the jack 5 to support the reaction force device 1, the reaction force device 1 exerts a directional force on the rigid plate 4 through the jack 5. At this time, the rigid plate 4 transmits the reaction force to the ground, causing the ground to settle, simulating the phenomenon that occurs when the ground is under the action of a large load; at the same time, the measuring component 6 monitors the change in the hydraulic pressure of the driving jack 5 and the displacement change of the rigid plate 4 under different reaction forces, and finally integrates the obtained monitoring values and draws a curve change diagram, which is the result of the ground load test.

[0057] The reaction force device 1 includes a support frame 11, a connecting cable 191, and a fixing column 19. The support frame 11 is a frame structure composed of multiple horizontal and vertical column segments. The support frame 11 abuts against the ground and is used to support and carry heavy objects. The fixing column 19 is inserted into the ground. There are multiple fixing columns 19 and they are evenly spaced along the circumferential direction around the support frame 11. The connecting cable 191 is a steel cable structure. The connecting cables 191 correspond to the fixing columns 19 one by one. One end of the connecting cable 191 is fixed to the top of the fixing column 19, and the other end is fixed to the edge position of the support frame 11. The connecting cable 191 is inclined. When in use, the fixing column 19 exerts a pulling force on the support frame 11 through the connecting cable 191 to improve the installation stability of the support frame 11.

[0058] The reaction force device 1 further includes a bottom plate 12 and a surrounding plate 13. The bottom plate 12 is fixed at the middle position of the top of the support frame 11. The top end face of the bottom plate 12 is in a square structure or a rectangular structure. In the embodiment of the present application, the end face of the bottom plate 12 is a rectangular structure. The surrounding plate 13 includes long plates 131 and short plates 132. There are two long plates 131 and they are symmetrically arranged. There are two short plates 132 and they are symmetrically arranged between the two long plates 131. The long plates 131 and the short plates 132 are fixedly connected. The long plates 131 are located at the edge positions in the length direction of the bottom plate 12, and the short plates 132 are located at the edge positions in the width direction of the bottom plate 12. The surrounding plate 13 is fixedly connected to the bottom plate 12, and the surrounding plate 13 surrounds the bottom plate 12 along the circumferential direction to form a storage cavity 15.

[0059] When the reaction force device 1 is arranged, the soil on the ground can be excavated and stored in the storage cavity 15 to provide load for the support frame 11, which is beneficial to providing load by replacing stacked regular stones with soil accumulation; when there are no regular stones in the test site, there is no need to prepare stones additionally, and the soil on the test site can be directly excavated, which is convenient to construct the reaction force device 1 during the load test, greatly reducing the test difficulty, and the soil can also be filled back into the test site after the test ends.

[0060] See Figure 2 , the reaction force device 1 further includes a pressing plate 14 and a driving assembly. The pressing plate 14 slides up and down in the storage cavity 15, and the size of the top end face of the pressing plate 14 is adapted to the cavity opening of the storage cavity 15. The driving assembly is arranged on the support frame 11. During use, the pressing plate 14 is driven to move up and down by the driving assembly, so that the pressing plate 14 can extrude the soil in the storage cavity 15, which is beneficial to improving the compactness of the soil and greatly increasing the reaction force that the reaction force device 1 can generate.

[0061] See Figure 2 And Figure 3 , the driving assembly includes a driving lead screw 2, a connecting column 21, a driving shaft 22, a transmission bevel gear 23, a connecting bevel gear 24 and a driving motor 25.

[0062] On the opposite sides of the two long plates 131, two mounting plates are symmetrically fixed up and down respectively. There are two driving lead screws 2, which correspond to the long plates 131 one by one. The driving lead screws 2 are arranged in the vertical direction and are rotatably connected to the two mounting plates arranged symmetrically up and down.

[0063] The connecting column 21 includes a connecting block 211, a limiting block 212 and a column body 213. There are two column bodies 213, which correspond to the driving lead screws 2 one by one.

[0064] See Figure 3 And Figure 4 , the column body 213 is in an inverted "U" - shaped structure, and one end of the column body 213 is fixed at the middle position on one side of the pressing plate 14 in the length direction.

[0065] See Figure 3 And Figure 5 , the connecting block 211 is in a cylindrical block structure, and the connecting block 211 is threadedly connected to the driving lead screw 2. A connecting groove 2131 is formed at the other end of the column body 213 away from the pressing plate 14. The connecting groove 2131 is in a circular groove structure. The connecting block 211 slides up and down in the connecting groove 2131, and the connecting block 211 is rotatably connected to the column body 213.

[0066] A limiting groove 2132 extending upward is formed at the bottom of the connecting block 211, and the limiting groove 2132 is connected to the connecting groove 2131. The limiting block 212 corresponds to the limiting groove 2132 one by one and is fixed on the outer peripheral side of the connecting block 211. When the connecting block 211 slides into the connecting groove 2131, the limiting block 212 slides in the limiting groove 2132. The connecting block 211 is formed with a sliding groove 2133 of an arc-shaped groove segment structure extending in the circumferential direction, and the sliding groove 2133 is located on the peripheral side wall of the connecting groove 2131 and is connected, and the sliding groove 2133 is connected to the limiting groove 2132 and the connecting port is located at the top position of the limiting groove 2132.

[0067] When the driving screw rod 2 rotates forward, the driving screw rod 2 drives the connecting block 211 to rotate. At this time, the limiting block 212 slides into the slide groove 2133 until the limiting block 212 abuts against the slide groove 2133 away from the groove wall on one side of the limiting groove 2132; then when the driving screw rod 2 continues to rotate, the connecting block 211 drives the column 213 to move downward, so that the extrusion plate 14 squeezes the soil in the storage chamber 15.

[0068] The drive shaft 22 extends horizontally and is rotatably connected to the bottom plate 12. The drive shaft 22 is perpendicular to the drive screw 2. The transmission bevel gear 23 corresponds to the drive screw 2 and is fixed to both ends of the drive shaft 22. The transmission bevel gear 23 is rotatably connected to the bottom plate 12.

[0069] The connecting bevel gear 24 corresponds to the driving screw rod 2 one by one and is fixed at one end of the bottom of the driving screw rod 2. The connecting bevel gear 24 meshes with the transmission bevel gear 23. The driving motor 25 is fixed on the support frame 11. The rotating shaft of the driving motor 25 is rotatably connected to the bottom plate 12. At the same time, the rotating shaft of the driving motor 25 is fixedly connected and coaxially arranged with the driving shaft 22. The driving motor 25 has its own battery and works by providing energy through the battery. The driving motor 25 is a forward and reverse motor. When the driving motor 25 is started and the output shaft rotates forward, the output shaft of the driving motor 25 drives the driving shaft 22 to rotate forward. At this time, the transmission bevel gear 23 drives the driving screw 2 to rotate forward through the connecting bevel gear 24, so that the column 213 can drive the extrusion plate 14 to move downward. At this time, the driving screw 2 continuously slides into the connecting groove 2131; when the driving motor 25 is started and the output shaft rotates reversely, the output shaft of the driving motor 25 drives the driving shaft 22 to rotate reversely. At this time, the transmission bevel gear 23 drives the driving screw 2 to rotate reversely through the connecting bevel gear 24, so that the column 213 can drive the extrusion plate 14 to move downward.

[0070] See also Figure 3 and Figure 4, To facilitate adding soil into the storage cavity 15 after the extrusion plate 14 extrudes the soil in the storage cavity 15, the extrusion plate 14 includes a frame 141 and a push plate 142. The middle of the frame 141 is hollow to form an opening 143, making the frame 141 in a "mouth" - shaped structure. The shape of the frame 141 is adapted to the shape of the cavity opening of the storage cavity 15, and the end of the column 213 is fixed on the frame 141.

[0071] An installation groove 144 is horizontally formed in the middle of the frame 141. Two push plates 142 are symmetrically arranged and slide in the installation groove 144 respectively. When the two push plates 142 slide into the installation groove 144 until they abut against each other, the opposite sides of the two push plates 142 are respectively in the same vertical plane as the opposite side walls of the frame 141. At this time, the two push plates 142 cooperate with each other to block the opening 143. During extrusion, the push plate 142 and the frame 141 cooperate with each other to extrude the soil in the storage cavity 15. After extrusion, the frame 141 is driven upward to the position of the cavity opening of the storage cavity 15. Then, the two push plates 142 are slid in the direction away from each other to open the opening 143. Then, soil can be continuously filled into the storage cavity 15 through the opening 143.

[0072] See Figure 4 And Figure 5 , A stop block 145 is fixedly connected to the frame 141. The stop block 145 is located in the installation groove 144 and at the middle position in the length direction of the frame 141. Block grooves 146 are respectively formed on the opposite sides of the two push plates 142. When the two push plates 142 slide into the installation groove 144 until they are in an abutting state, the stop block 145 is snapped into the block grooves 146 to limit the position of the push plates 142. At this time, the opposite sides of the two push plates 142 are in the same vertical plane as the opposite side walls of the frame 141.

[0073] The implementation principle of a shallow - layer plate load test device in the first embodiment of this application is as follows:

[0074] When setting up the test device, first support the support frame 11 on the ground, then fill the storage cavity 15 with soil, and then install the extrusion plate 14. Then start the driving motor 25 to make the rotating shaft of the driving motor 25 rotate forward, drive the extrusion plate 14 to extrude the soil downward, and drive the extrusion plate 14 to slide upward to the position of the cavity opening of the storage cavity 15 after the soil is compacted. Then continue to fill the storage cavity 15 with soil and drive the extrusion plate 14 to extrude the soil until the height of the compacted soil in the storage cavity 15 is close to the position of the cavity opening of the storage cavity 15 and then stop. After that, the rigid plate 4, the jack 5 and the measuring piece 6 can be set up, and finally the load test can be started.

[0075] Embodiment Two

[0076] See Figure 6 And Figure 7, the difference between the second embodiment and the first embodiment of this application lies in that: the long board 131, the short board 132 and the bottom board 12 are detachably connected, which is convenient for transporting and carrying the load test device.

[0077] The reaction force device 1 further includes a fixing strip 17, a fixing pin 16 and a connecting chain 18. The fixing strips 17 correspond to the long board 131 and the short board 132 one by one, and the fixing strip 17 is fixed at the top edge position of the bottom board 12. Fixing grooves 133 are formed at the bottoms of the long board 131 and the short board 132. The fixing strip 17 is inserted into the fixing groove 133, so that the long board 131 and the short board 132 are initially installed and connected to the top of the bottom board 12. At this time, the long board 131 and the short board 132 are in contact with each other, reducing the possibility of the soil in the storage cavity 15 overflowing from the gap between the long board 131 and the short board 132. There are multiple fixing pins 16 which are symmetrically arranged on the long board 131 respectively. Insertion grooves corresponding to the fixing pins 16 one by one are formed on the side of the short board 132 facing the long board 131. The fixing pins 16 are inserted into the insertion grooves to realize the connection and fixation between the long board 131 and the short board 132. There are multiple connecting chains 18 which correspond to the long board 131 and the short board 132 one by one. One end of the connecting chain 18 is fixed at a position near the bottom of the side walls of the long board 131 and the short board 132, and the other end is fixed on the bottom board 12. During use, the bottom board 12, the long board 131 and the short board 132 are connected by the connecting chain 18, reducing the possibility of the long board 131 and the short board 132 being lost after disassembly.

[0078] The above are all the preferred embodiments of this application. Without limiting the protection scope of this application accordingly, therefore: all equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. A shallow plate load test device, characterized in that: including a reaction force device (1), the reaction force device (1) including a support frame (11), a bottom plate (12), a surrounding plate (13), a pressing plate (14) and a driving assembly; the support frame (11) is arranged on the ground, an installation space (3) is formed between the support frame (11) and the ground, and the bottom plate (12) is arranged on the top of the support frame (11); there are a plurality of the surrounding plates (13) which are arranged on the top of the support frame (11), and the surrounding plates (13) surround the bottom plate (12) along the circumferential direction to form a storage cavity (15) for storing soil; the pressing plate (14) slides up and down in the storage cavity (15), the driving assembly is arranged on the support frame (11), and the driving assembly drives the pressing plate (14) to press the soil in the storage cavity (15); a rigid plate (4), which is arranged on the ground and located in the installation space (3); a jack (5), which is arranged between the rigid plate (4) and the support frame (11), and the upper and lower ends of the jack (5) respectively abut against the support frame (11) and the rigid plate (4); a plurality of measuring members (6), which are respectively arranged on the jack (5) and the rigid plate (4).

2. The shallow plate load test equipment according to claim 1, characterized in that: The driving assembly includes a driving lead screw (2), a connecting column (21), a driving shaft (22), a transmission bevel gear (23), a connecting bevel gear (24) and a driving motor (25); the driving lead screws (2) are symmetrically arranged and are respectively rotatably connected to the opposite sides of the surrounding plate (13); the connecting column (21) connects the driving lead screw (2) and the pressing plate (14), the connecting column (21) is in threaded connection with the driving lead screw (2), and when the driving lead screw (2) rotates, the connecting column (21) drives the pressing plate (14) to move up or down; the driving shaft (22) is rotatably connected to the bottom plate (12), the transmission bevel gears (23) are symmetrically arranged and are respectively located at both ends of the driving shaft (22), the connecting bevel gear (24) is arranged at the bottom of the driving lead screw (2), and the connecting bevel gear (24) meshes with the transmission bevel gear (23); the driving motor (25) is arranged on the support frame (11), and the rotating shaft of the driving motor (25) is connected to the driving shaft (22).

3. The shallow plate load test equipment according to claim 2, characterized in that: The connecting column (21) includes a connecting block (211), a limiting block (212) and a column body (213); one end of the column body (213) is fixed to the top of the pressing plate (14), and a connecting groove (2131) is formed at the other end, the connecting block (211) slides up and down and rotates in the connecting groove (2131), and the connecting block (211) is in threaded connection with the driving lead screw (2); The limiting block (212) is arranged on the outer peripheral side of the connecting block (211). The connecting block (211) forms a limiting groove (2132) communicating with the connecting groove (2131). The limiting block (212) slides up and down in the limiting groove (2132). The connecting block (211) is circumferentially formed with a sliding groove (2133) for the limiting block (212) to slide. The sliding groove (2133) communicates with the limiting groove (2132) and the connecting groove (2131).

4. The shallow plate load test equipment according to claim 2, characterized in that: The pressing plate (14) includes a frame (141) and a pushing plate (142); The frame (141) is connected to the connecting column (21). An opening (143) is formed in the middle of the frame (141). The pushing plates (142) are symmetrically arranged and slide in the frame (141). When the pushing plates (142) abut against each other, the opening (143) is closed.

5. The shallow plate load test equipment according to claim 4, characterized in that: The frame (141) is formed with a mounting groove (144) for the pushing plate (142) to slide. The frame (141) includes a blocking block (145) located in the mounting groove (144). The pushing plate (142) is formed with a blocking groove (146). When the pushing plates (142) abut against each other, the blocking block (145) is inserted into the blocking groove (146).

6. The shallow plate load test equipment according to claim 1, characterized in that: The reaction force device (1) includes a fixing strip (17) and a fixing pin (16); The fixing strip (17) corresponds to the surrounding plate (13) one by one and is arranged on the top of the bottom plate (12). The bottom of the surrounding plate (13) is formed with a fixing groove (133) for the fixing strip (17) to be inserted. The surrounding plate (13) includes a long plate (131) and a short plate (132). The long plates (131) are oppositely arranged. The short plates (132) are symmetrically arranged between the opposite long plates (131). The fixing pin (16) penetrates through the long plate (131). The short plate (132) is formed with a pin slot for the fixing pin (16) to be inserted.

7. The shallow plate load test equipment according to claim 6, characterized in that: The reaction force device (1) further includes a connecting chain (18). Both ends of the connecting chain (18) are respectively connected to the surrounding plate (13) and the bottom plate (12).

8. The shallow plate load test equipment according to claim 1, characterized in that: The reaction force device (1) further includes a connecting cable (191) and a fixing column (19); There are multiple fixing columns (19) which are respectively fixed on the ground. One end of the connecting cable (191) is connected to the fixing column (19), and the other end is connected to the support frame (11).

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