A device for testing long-term impermeability of sand layer permeation grouting reinforcement

Abstract

This utility model relates to a long-term impermeability testing device for sand layer permeability grouting solidified blocks. Two test supports symmetrically arranged on the top of the workbench hold solidified block test pieces. The two test supports enable simultaneous comparative experiments on solidified block test pieces made with different formulations. The testing device also includes: a pushing mechanism installed on the top of the workbench, positioned between the two test supports, used to pressurize and push water out; and a conveying mechanism installed on the top of the workbench, connecting to the pushing mechanism and the two test supports to disperse and deliver water into the two test supports, enabling pressurized water injection testing of the two solidified block test pieces. This utility model, with its two test supports, allows for lateral comparative testing of solidified block test pieces with different formulation ratios. Furthermore, during testing, the two solidified block test pieces can be quickly and conveniently assembled to detect their performance.

Description

Technical Field

[0001] This utility model belongs to the field of building material testing technology, and relates to a long-term impermeability testing device for sand layer permeation grouting solidification. Background Technology

[0002] In the field of building materials testing, sand layer permeation grouting reinforcement technology is widely used to improve the bearing capacity and stability of foundations and prevent groundwater seepage. The reinforced body, as a product of grouting reinforcement, has long-term impermeability performance that is one of the important indicators for evaluating the reinforcement effect.

[0003] However, there is currently a lack of an effective and accurate device for testing the long-term impermeability of sand-layer permeable grouting reinforced bodies. Existing testing methods often suffer from problems such as complex operation, low testing efficiency, and inability to simultaneously compare test blocks of different grouting reinforced bodies, making it difficult to meet practical engineering needs. Therefore, developing a novel testing device for the long-term impermeability of sand-layer permeable grouting reinforced bodies is of significant practical importance. Utility Model Content

[0004] In view of this, in order to solve the problems of existing testing methods being complicated to operate, having low testing efficiency, being unable to simultaneously compare the impermeability effects of solidified test blocks with different formulations, and being unable to meet the actual needs of engineering, this utility model provides a long-term impermeability testing device for sand layer permeability grouting solidified blocks.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A device for testing the long-term impermeability of grout-reinforced solidified sand layers includes a workbench with two symmetrically arranged test supports on the top of the workbench. Each test support contains a solidified ...

[0007] A push mechanism is installed on the top of the workbench, positioned between two test supports. Water is contained within the push mechanism to pressurize and push the water out.

[0008] The conveying mechanism installed on the top of the workbench, together with the pushing mechanism and the two test brackets, can disperse and deliver water into the two test brackets to perform pressurized water injection tests on the two solidified test blocks.

[0009] Furthermore, the test bracket includes a support frame fixedly installed on the top of the workbench, a support mesh plate fixedly installed inside the support frame, and a cover connected to the support frame by two hinges. The cover can rotate to engage with the support frame. The solidified test block is placed inside the support frame, and the four sides of the solidified test block are tightly fitted to the corresponding inner walls of the support frame. A bent pipe is fixedly installed through the top inner wall of the cover, and the top end of the bent pipe is connected to the conveying mechanism.

[0010] Beneficial effects: After placing the solidified test block inside the support frame, the solidified test block is tightly fitted to the support frame on all sides. Then, by flipping the cap, the cap is rotated into the support frame and pressed against the solidified test block. At this time, after injecting into the cap, the solidified test block can be subjected to pressure water injection test.

[0011] Furthermore, a collar is rotatably connected to one side of the support frame, a threaded assembly is connected to the collar, a clamping plate is connected to the threaded assembly, a clamping shaft is fixedly installed on one side of the bottom of the clamping plate, and a clamping ring is fixedly installed on one side of the cover. The clamping shaft passes through the clamping ring and forms an insert-and-clamp fit with the clamping ring.

[0012] Beneficial effects: After the cap is rotated to the position where it engages with the support frame, the threaded assembly can be driven to move the clamping plate, which in turn drives the clamping shaft to move, thus forming a clamping relationship with the clamping ring. This achieves stable positioning of the cap and a stable connection between the cap and the support frame.

[0013] Furthermore, the threaded assembly includes a support tube fixedly mounted on the collar, an adjusting nut rotatably connected to the top end of the support tube, an adjusting screw threaded through the adjusting nut, the top end of the adjusting screw being fixedly connected to one side of the bottom of the clamping plate, and the bottom end of the adjusting screw extending into the support tube and slidingly connected to the inner wall of the support tube.

[0014] Beneficial effects: Since the adjusting screw and the support tube are slidably connected, the adjusting screw will not rotate with the adjusting nut. Therefore, when the adjusting nut is rotated, the adjusting screw can be moved downward under the threaded transmission action with the adjusting screw. At this time, the clamping plate that moves downward with the adjusting screw can drive the clamping shaft to move downward, so that the clamping shaft and the clamping ring form a clamping engagement relationship.

[0015] Furthermore, a mounting ring is fixedly installed at the bottom end of the bend, the bottom of the mounting ring extends into the cover, a mounting bracket is fixedly installed at the bottom of the mounting ring, a moving rod is slidably connected through the mounting bracket, the top end of the moving rod extends into the mounting ring and a ball is fixedly installed thereon, the ball fits tightly against the inner wall of the mounting ring, a pressure plate is fixedly installed at the bottom end of the moving rod, the pressure plate contacts the top of the solidified test block being tested, a compression spring is sleeved on the moving rod located below the mounting bracket, the top and bottom ends of the compression spring are fixedly connected to the bottom of the mounting bracket and the top of the pressure plate respectively through hooks set at their top and bottom ends.

[0016] Beneficial effects: When the cap is rotated to the position where it engages with the support frame, the solidified test block used for testing can block the pressure plate. At this time, the moving rod can be driven to slide along the mounting frame, thereby allowing the ball to disengage from the inner wall of the mounting ring. This makes it easy to inject water into the cap. When only one solidified test block is tested without comparison testing, when the pressure plate is not supported by the solidified test block, the compressed spring under force can push the moving rod to move, making the ball fit tightly against the inner wall of the mounting ring. This prevents the connected bend from flowing, avoiding the water used for testing from flowing randomly and affecting the pressure on the solidified test block to be tested.

[0017] Furthermore, the pushing mechanism includes a transmission box fixedly installed on the top of the workbench. A liquid outlet pipe is fixedly installed through one side of the inner wall of the transmission box. One end of the liquid outlet pipe extends to the outside of the transmission box and is connected to the conveying mechanism. An electric push rod is also fixedly installed on the top of the transmission box. A transmission assembly is connected to the output shaft of the electric push rod. One side of the transmission assembly extends into the transmission box and is fitted with a piston plate. The piston plate is tightly fitted to the inner wall of the transmission box.

[0018] Beneficial effects: By activating the electric actuator to drive the transmission assembly, the piston plate can be moved within the transmission box, thereby outputting water from the transmission box through the outlet pipe. The electric actuator provides a stable driving force, thus maintaining a constant pressure to push the water out.

[0019] Furthermore, the transmission assembly includes a connecting plate fixedly mounted on the output shaft of the electric push rod, a transmission rod fixedly mounted on one side bottom of the connecting plate, and one end of the transmission rod extending into the transmission box and fixedly connected to one side of the piston plate.

[0020] Beneficial effect: When the connecting plate moves with the output shaft of the electric push rod, it can drive the piston plate to move through the transmission rod, thereby facilitating the pushing out of water.

[0021] Furthermore, a water injection hole is provided on one side of the inner wall of the transmission box, and a sealing plug is connected to the sealing thread inside the water injection hole.

[0022] Beneficial effects: The water injection hole allows for easy replenishment of water into the transmission box, and the sealing plug can be used to seal the water injection hole, thereby preventing leakage.

[0023] Furthermore, the conveying mechanism includes a diverter cylinder fixedly installed on one side of the top of the workbench. One end of the liquid outlet pipe extends into the diverter cylinder and is fixedly connected to the inner wall of one side of the diverter cylinder. Two conveying hoses are also symmetrically and fixedly installed through one side of the inner wall of the diverter cylinder, and one end of the conveying hose is fixedly connected to the corresponding bend.

[0024] Beneficial effects: After water is delivered to the distribution cylinder through the outlet pipe, it can be distributed to the two bends through the delivery hose. This allows water at the same pressure to be delivered to the two caps when comparing the two solidified test blocks, thus enabling synchronous pressurized water injection tests on the two solidified test blocks.

[0025] Furthermore, two drainage holes are symmetrically opened on the workbench, each corresponding to one of the two support frames. Two water tanks are also symmetrically fixed on the workbench, with the water tanks corresponding to the drainage holes. A drain pipe is fixedly installed through the bottom inner wall of one side of the water tank.

[0026] Beneficial effect: When the solidified test block is pressurized and water is injected, the water passing through the solidified test block will fall into the water tank and then be discharged through the drain pipe. The water flow in the drain pipes on both sides can be used to judge the water resistance of the two solidified test blocks.

[0027] The beneficial effects of this utility model are as follows:

[0028] 1. The long-term impermeability testing device for sand layer permeability grouting reinforced solids disclosed in this utility model, through the set test bracket, can make the reinforced solid test block fit tightly with the support frame after placing it in the support frame. Then, by flipping the cover, the cover is rotated into the support frame and pressed against the reinforced solid test block. At this time, after injecting into the cover, the reinforced solid test block can be pressure-injected with water to achieve the test.

[0029] 2. The long-term impermeability testing device for sand layer permeation grouting solidified body disclosed in this utility model, through the set push mechanism, can drive the transmission component to run by starting the electric push rod, thereby driving the piston plate to move in the transmission box, thereby outputting water in the transmission box through the liquid outlet pipe, and the electric push rod can provide a stable driving force, thereby maintaining the water being pushed out at a constant pressure.

[0030] 3. The sand layer permeability grouting solidification long-term impermeability testing device disclosed in this utility model, through the set conveying mechanism, can deliver water through the outlet pipe to the distribution cylinder, and then disperse it through the conveying hose to two bends. Thus, when comparing the two solidification test blocks, water of the same pressure can be delivered to the two caps respectively, realizing the synchronous pressurized water injection test of the two solidification test blocks.

[0031] This invention features two test supports, enabling lateral comparative testing of solidified test blocks with different formulation ratios. Furthermore, the two solidified test blocks can be quickly and easily assembled during testing to evaluate their performance.

[0032] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0034] Figure 1 This is a schematic diagram of the structure of the long-term impermeability testing device for sand layer permeation grouting reinforcement. Figure 1 ;

[0035] Figure 2 This is a schematic diagram of the structure of the long-term impermeability testing device for sand layer permeation grouting reinforcement. Figure 2 ;

[0036] Figure 3 This utility model Figure 1 Schematic diagram of the connection structure between the middle support frame and the cover;

[0037] Figure 4 This utility model Figure 1 Schematic diagram of the separation structure of the central support frame and the solidified test block;

[0038] Figure 5 This utility model Figure 1 Side sectional view;

[0039] Figure 6 This utility model Figure 1 Sectional view of the transmission box;

[0040] Figure 7 This utility model Figure 1A schematic diagram of the connection structure of the mounting ring, moving rod, ball, and compression spring.

[0041] Reference numerals: 1. Workbench; 2. Support frame; 201. Support mesh plate; 3. Cover; 4. Collar; 5. Support pipe; 6. Adjusting nut; 601. Adjusting screw; 7. Clamping plate; 8. Clamping shaft; 9. Clamping ring; 10. Bend; 11. Conveying hose; 12. Diverter; 13. Transmission box; 14. Discharge pipe; 15. Electric push rod; 16. Connecting plate; 17. Transmission rod; 18. Drain hole; 19. Piston plate; 20. Solidified test block; 21. Water tank; 22. Drain pipe; 23. Mounting ring; 24. Mounting bracket; 25. Moving rod; 26. Ball; 27. Pressure plate; 28. Compression spring. Detailed Implementation

[0042] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0043] refer to Figure 1 In this long-term impermeability testing device for sand layer permeability grouting reinforcement, two test supports are symmetrically arranged on the top of the workbench 1. Each test support includes a support frame 2 fixedly installed on the top of the workbench 1; (Reference) Figure 4 A support mesh plate 201 is fixedly installed inside the support frame 2 to place the solidified test block 20 and ensure that the four sides of the solidified test block 20 are tightly fitted to the corresponding inner walls of the support frame 2. A cover 3 is connected to the support frame 2 via two hinges, allowing the cover 3 to rotate and engage with the support frame 2. A bent pipe 10 is fixedly installed through the top inner wall of the cover 3, and the top end of the bent pipe 10 is used to connect to the subsequent conveying mechanism.

[0044] refer to Figure 3 A collar 4 is rotatably connected to one side of the support frame 2, and a support tube 5 is fixedly connected to the collar 4. An adjusting nut 6 is rotatably connected to the top of the support tube 5. An adjusting screw 601 is threaded through the adjusting nut 6, and a clamping plate 7 is fixedly connected to the top of the adjusting screw 601. A clamping shaft 8 is fixedly installed on one side of the bottom of the clamping plate 7. A clamping ring 9 is fixedly installed on one side of the cover 3, and the clamping shaft 8 can pass through the clamping ring 9 to form an insert-and-lock engagement relationship with the clamping ring 9. By rotating the adjusting nut 6, the adjusting screw 601 can move downward under the action of thread transmission, driving the clamping plate 7 and the clamping shaft 8 to move downward, so that the clamping shaft 8 and the clamping ring 9 form a locking engagement relationship, thereby achieving stable positioning of the cover 3.

[0045] refer to Figure 5 , Figure 7 A mounting ring 23 is fixedly installed at the bottom end of the bend 10, and the bottom of the mounting ring 23 extends into the cover 3. A mounting bracket 24 is fixedly installed at the bottom of the mounting ring 23, and a moving rod 25 is slidably connected through the mounting bracket 24. The top end of the moving rod 25 extends into the mounting ring 23 and a ball 26 is fixedly installed thereon, and the ball 26 fits tightly against the inner wall of the mounting ring 23. A pressure plate 27 is fixedly installed at the bottom end of the moving rod 25, and the pressure plate 27 contacts the top of the solidified test block 20 being tested. A compression spring 28 is sleeved on the moving rod 25, located below the mounting bracket 24. The top and bottom ends of the compression spring 28 are fixedly connected to the bottom of the mounting bracket 24 and the top of the pressure plate 27 respectively via hooks. When the cap 3 is rotated to the position where it engages with the support frame 2, the solidified test block 20 will press against the pressure plate 27, causing the moving rod 25 to slide along the mounting frame 24, thus disengaging the ball 26 from the inner wall of the mounting ring 23, facilitating the injection of water into the cap 3. When only one solidified test block 20 is tested without comparative testing, the pressure plate 27 is not supported by the solidified test block 20, and the compression spring 28 will push the moving rod 25 to ensure that the ball 26 fits tightly against the inner wall of the mounting ring 23, preventing water from flowing freely.

[0046] A pushing mechanism, including a transmission box 13 fixedly mounted on the top of the workbench 1 between two test supports, is installed on the top of the workbench 1. A liquid outlet pipe 14 is fixedly installed through one side of the inner wall of the transmission box 13, with one end extending to the outside of the transmission box 13. An electric push rod 15 is fixedly installed on the top of the transmission box 13, and a connecting plate 16 is fixedly connected to the output shaft of the electric push rod 15. A transmission rod 17 is fixedly installed on the bottom side of one side of the connecting plate 16, with one end extending into the transmission box 13 and fixedly connected to a piston plate 19, which fits tightly against the inner wall of the transmission box 13. By activating the electric push rod 15, the connecting plate 16 and the transmission rod 17 can be moved, thereby moving the piston plate 19 within the transmission box 13, outputting water from the transmission box 13 through the liquid outlet pipe 14. A water injection hole is provided on one side of the inner wall of the transmission box 13, with a sealing plug threaded into the hole for adding water to the transmission box 13 and preventing leakage.

[0047] refer to Figure 2 and Figure 6Based on the above embodiment 1, an improvement is made by installing a conveying mechanism on one side of the top of the workbench 1, including a distribution cylinder 12 fixedly installed on one side of the top of the workbench 1. One end of the outlet pipe 14 extends into the distribution cylinder 12 and is fixedly connected to the inner wall of one side of the distribution cylinder 12. Two conveying hoses 11 are symmetrically and fixedly installed through one side of the inner wall of the distribution cylinder 12, and one end of the conveying hose 11 is fixedly connected to the corresponding bend 10. After water is conveyed into the distribution cylinder 12 through the outlet pipe 14, it can be dispersed and conveyed into the two bends 10 through the conveying hoses 11, realizing the synchronous pressurized water injection test of the two solidified test blocks 20.

[0048] Two symmetrical drain holes 18 are provided on the workbench 1, corresponding to the positions of the two support frames 2 respectively. Two symmetrically fixed water tanks 21 are also installed on the workbench 1, with each water tank 21 corresponding to one of the drain holes 18. A drain pipe 22 is fixedly installed through the inner wall of one bottom side of each water tank 21. During pressurized water injection testing of the solidified test block 20, water passing through the solidified test block 20 will fall into the water tank 21 and then be discharged through the drain pipe 22. By observing the amount of water flowing through the drain pipes 22 on both sides, the permeability resistance of the two solidified test blocks 20 can be determined.

[0049] This application can be used in the field of building materials testing technology, or in other fields applicable to this application.

[0050] The long-term impermeability testing device for this sand layer permeability grouting reinforcement includes the following steps:

[0051] S1. Place the solidified test block 20 to be tested into the support frame 2 of the two test brackets respectively, ensuring that the four sides of the solidified test block 20 are tightly fitted with the corresponding inner wall of the support frame 2. Turn the cover 3 over so that it is rotated to the position where it engages with the support frame 2. By rotating the adjusting nut 6, the adjusting screw 601 moves downward, thereby driving the clamping plate 7 and the clamping shaft 8 to move downward, so that the clamping shaft 8 passes through the clamping ring 9 and forms an insertion and clamping relationship with the clamping ring 9, thereby achieving stable positioning of the cover 3.

[0052] S2. After the cap 3 and the support frame 2 are engaged, rotate the cap 3 to the position where it engages with the support frame 2. The solidified test block 20 used for testing can block the pressure plate 27. At this time, it can drive the moving rod 25 to slide along the mounting frame 24, so that the ball 26 can be separated from the inner wall of the mounting ring 23. At this time, it is convenient to inject water into the cap 3. The solidified test block 20 will press against the pressure plate 27, causing the moving rod 25 to slide along the mounting frame 24, and the ball 26 will be separated from the inner wall of the mounting ring 23, preparing for water injection.

[0053] S3. Start the electric push rod 15 to drive the connecting plate 16 to move. At this time, under the transmission action of the transmission rod 17, the piston plate 19 is driven to move in the transmission box 13, pressurizing and pushing out the water in the transmission box 13. The water is transported to the distribution cylinder 12 through the liquid outlet pipe 14, and then distributed to the two bends 10 through the delivery hose 11. The water flows into the sealing cover 3 to conduct a pressurized water injection test on the solidified test block 20. When the solidified test block 20 is pressurized and water is injected, the water passing through the solidified test block 20 will fall into the water drop box 21. Observe and record the water flow of the drain pipes 22 on both sides. By comparing the amount of water flow on both sides, the quality of the anti-permeability performance of the two solidified test blocks 20 can be judged.

[0054] S4. If only one solidified test block 20 is tested, the pressure plate 27 inside the other cover 3 will not be supported by the solidified test block 20. The compression spring 28 will push the moving rod 25 to make the ball 26 fit tightly against the inner wall of the mounting ring 23, preventing the water from flowing freely.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for testing long-term impermeability of sand layer permeation grouting reinforcement body, comprising a workbench (1), two test supports are symmetrically arranged on the top of the workbench (1), a reinforcement body test block (20) is arranged in each test support, and the two test supports can realize synchronous comparative experiment on reinforcement body test blocks (20) made of different formulas, characterized in that, The testing apparatus also includes: A push mechanism is installed on the top of the workbench (1). The push mechanism is set between two test brackets. Water is installed inside the push mechanism to pressurize and push out the water. The conveying mechanism installed on the top of the workbench (1) is connected to the pushing mechanism and the two test brackets. It can disperse and convey water into the two test brackets to perform pressurized water injection test on the two solidified test blocks (20).

2. The long-term impermeability testing device for sand layer permeability grouting reinforced solids as described in claim 1, characterized in that, The test bracket includes a support frame (2) fixedly installed on the top of the workbench (1). A support mesh plate (201) is fixedly installed inside the support frame (2). A cover (3) is also connected to the support frame (2) by two hinges. The cover (3) can rotate to engage with the support frame (2). A solid test block (20) is placed inside the support frame (2). The four sides of the solid test block (20) are tightly fitted to the corresponding inner walls of the support frame (2). A bent pipe (10) is fixedly installed through the top inner wall of the cover (3). The top end of the bent pipe (10) is connected to the conveying mechanism.

3. The long-term impermeability testing device for sand layer permeability grouting reinforced solids as described in claim 2, characterized in that, A collar (4) is rotatably connected to one side of the support frame (2). A threaded assembly is connected to the collar (4). A clamping plate (7) is connected to the threaded assembly. A clamping shaft (8) is fixedly installed on one side of the bottom of the clamping plate (7). A clamping ring (9) is fixedly installed on one side of the cover (3). The clamping shaft (8) passes through the clamping ring (9) and forms an insertion and clamping relationship with the clamping ring (9).

4. The long-term impermeability testing device for sand layer permeability grouting reinforced solids as described in claim 3, characterized in that, The threaded assembly includes a support tube (5) fixedly mounted on a collar (4). An adjusting nut (6) is rotatably connected to the top end of the support tube (5). An adjusting screw (601) is threaded through the adjusting nut (6). The top end of the adjusting screw (601) is fixedly connected to one side of the bottom of the clamping plate (7). The bottom end of the adjusting screw (601) extends into the support tube (5) and slides through the inner wall of the support tube (5).

5. The long-term impermeability testing device for sand layer permeability grouting reinforced solids as described in claim 2, characterized in that, A mounting ring (23) is fixedly installed at the bottom end of the bent tube (10). The bottom of the mounting ring (23) extends into the cover (3). A mounting bracket (24) is fixedly installed at the bottom of the mounting ring (23). A moving rod (25) is slidably connected through the mounting bracket (24). The top of the moving rod (25) extends into the mounting ring (23) and a ball (26) is fixedly installed thereon. The ball (26) fits tightly against the inner wall of the mounting ring (23). A pressure plate (27) is fixedly installed at the bottom end of the moving rod (25). The pressure plate (27) contacts the top of the solidified test block (20) being tested. A compression spring (28) located below the mounting bracket (24) is sleeved on the moving rod (25). The top and bottom ends of the compression spring (28) are fixedly connected to the bottom of the mounting bracket (24) and the top of the pressure plate (27) respectively through hooks set at its top and bottom ends.

6. The long-term impermeability testing device for sand layer permeability grouting reinforced solids as described in claim 1, characterized in that, The pushing mechanism includes a transmission box (13) fixedly installed on the top of the workbench (1). A liquid outlet pipe (14) is fixedly installed through one side of the inner wall of the transmission box (13). One end of the liquid outlet pipe (14) extends to the outside of the transmission box (13) and is connected to the conveying mechanism. An electric push rod (15) is also fixedly installed on the top of the transmission box (13). A transmission assembly is connected to the output shaft of the electric push rod (15). One side of the transmission assembly extends into the transmission box (13) and is fitted with a piston plate (19). The piston plate (19) is tightly fitted to the inner wall of the transmission box (13).

7. The long-term impermeability testing device for sand layer permeability grouting reinforced solids as described in claim 6, characterized in that, The transmission assembly includes a connecting plate (16) fixedly mounted on the output shaft of the electric push rod (15). A transmission rod (17) is fixedly mounted on the bottom side of one side of the connecting plate (16). One end of the transmission rod (17) extends into the transmission box (13) and is fixedly connected to one side of the piston plate (19).

8. The long-term impermeability testing device for sand layer permeability grouting reinforced solids as described in claim 7, characterized in that, A water injection hole is provided on one side of the inner wall of the transmission box (13), and a sealing plug is connected to the sealing thread inside the water injection hole.

9. The long-term impermeability testing device for sand layer permeability grouting reinforced solids as described in claim 6, characterized in that, The conveying mechanism includes a diverter cylinder (12) fixedly installed on one side of the top of the workbench (1). One end of the liquid outlet pipe (14) extends into the diverter cylinder (12) and is fixedly connected to the inner wall of one side of the diverter cylinder (12). Two conveying hoses (11) are also symmetrically installed through the inner wall of one side of the diverter cylinder (12). One end of the conveying hose (11) is fixedly connected to the corresponding bend pipe (10).

10. The long-term impermeability testing device for sand layer permeability grouting reinforced solids as described in claim 2, characterized in that, Two drain holes (18) are symmetrically opened on the workbench (1) and correspond to the positions of the two support frames (2). Two water tanks (21) are also symmetrically fixed on the workbench (1). The positions of the water tanks (21) and the corresponding drain holes (18) are opposite. A drain pipe (22) is fixedly installed through the bottom inner wall of one side of the water tank (21).

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