A pressuremeter test device and method

Abstract

The present application discloses a lateral pressure test device and method, belonging to the field of geotechnical mechanics. It includes a dilatometer inserted into a preformed hole, a pipeline connected to the dilatometer, a fixed sleeve sleeved on the pipeline for fixedly connecting with the dilatometer, a mounting table sleeved on the fixed sleeve, a plurality of arc-shaped plates arranged on the mounting table, the arc-shaped plates being slidably matched with the inner side wall of the preformed hole, and a linear driving assembly arranged on the mounting table for driving the arc-shaped plates to move. The present application has the effect of protecting the dilatometer and ensuring the normal progress of the lateral pressure test.

Description

Technical Field

[0001] This application relates to the field of geotechnical mechanics, and in particular to a pressuremeter test device and method. Background Art

[0002] In a pressuremeter test, a cylindrical pressuremeter is vertically inserted into the soil. By using the expansion of the pressuremeter to apply a uniform pressure to the surrounding soil and measuring the relationship between the radial pressure and deformation, the stress-strain relationship of the foundation soil in the horizontal direction can be obtained. According to the different ways of setting the pressuremeter in the soil, the pressuremeter is divided into three types: pre-bored type, self-boring type, and pressed-in type. For the pre-bored pressuremeter test, the quality of the hole formation should be ensured, and the diameter of the borehole should be well matched with the diameter of the pressuremeter to prevent the collapse of the hole wall.

[0003] When an operator conducts a pressuremeter test using the pre-bored type, due to the relatively complex actual survey site conditions, there may be some protruding gravel on the inner wall of the pre-formed hole. On the one hand, these gravels may block the descent of the pressuremeter, and on the other hand, the protrusions may damage the surface of the pressuremeter, thus affecting the normal survey activities. Summary of the Invention

[0004] In order to protect the pressuremeter and ensure the normal progress of the pressuremeter test, this application provides a pressuremeter test device and method.

[0005] The pressuremeter test device and method provided by this application adopt the following technical solutions:

[0006] A pressuremeter test device includes a pressuremeter inserted into a pre-formed hole, a pipeline connected to the pressuremeter, a fixed sleeve sleeved on the pipeline for fixedly connecting with the pressuremeter, an installation platform sleeved on the fixed sleeve, a plurality of arc-shaped plates arranged on the installation platform, the arc-shaped plates being slidably matched with the inner wall of the pre-formed hole, and a linear driving component arranged on the installation platform for driving the arc-shaped plates to move.

[0007] By adopting the above technical solutions, the operator moves the pressuremeter downward along the pre-formed hole. When the pressuremeter moves, the operator uses the linear driving component to move the arc-shaped plates. When the arc-shaped plates move to the bottommost end, the plurality of arc-shaped plates cooperate to surround the pressuremeter. At this time, the setting of the arc-shaped plates is beneficial to preventing the gravel on the inner wall of the pre-formed hole from damaging the pressuremeter. Before the pressuremeter reaches the designated position, the operator uses the linear driving component to move the arc-shaped plates away again. The setting of the arc-shaped plates and the linear driving component is beneficial to ensuring the normal progress of the pressuremeter test.

[0008] Preferably, the linear drive assembly includes a connecting plate disposed on the arc-shaped plate and a lead screw passing through the connecting plate. The lead screw is in threaded engagement with the connecting plate. A plurality of groups of the linear drive assemblies are provided, and the linear drive assemblies correspond to the arc-shaped plates one by one. A power member for driving the lead screw to rotate is disposed on the mounting table.

[0009] By adopting the above technical solution, the operator drives the lead screw to rotate by using the power member. The rotation of the lead screw drives the connecting plate to move along the length direction of the lead screw, and the movement of the connecting plate drives the arc-shaped plate to move, so that it is convenient for the operator to control the lifting of the arc-shaped plate, and further convenient for the operator to control the position of the arc-shaped plate.

[0010] Preferably, the power member includes an internal gear ring rotatably mounted on the mounting table, a motor bracket disposed on the mounting table, and a driving motor mounted on the motor bracket. Rotating gears are fixedly sleeved on the lead screws, and the rotating gears are meshed with the internal gear ring. A driving gear is fixedly sleeved on the output shaft of the driving motor, and the driving gear is meshed with the internal gear ring.

[0011] By adopting the above technical solution, the operator starts the driving motor. The rotation of the output shaft of the driving motor drives the driving gear to rotate. The rotation of the driving gear causes the internal gear ring to rotate. The rotation of the internal gear ring causes the plurality of rotating gears to rotate simultaneously. The rotating gears cause the lead screw to rotate. The rotation of the lead screw causes the connecting plate to move along the length direction of the lead screw, and the movement of the connecting plate drives the arc-shaped plate to move. The setting of the power member facilitates the operator to control the simultaneous movement of a plurality of arc-shaped plates.

[0012] Preferably, positioning blocks are fixedly connected to the side surfaces of the arc-shaped plates close to each other. A dovetail block is fixedly connected to the positioning block. A dovetail groove for slidably cooperating with the dovetail block is formed in the connecting plate. A spring is fixedly connected to the dovetail block, and the end of the spring away from the dovetail block is fixedly connected to the inner end surface of the dovetail groove.

[0013] By adopting the above technical solution, the operator first pulls the arc-shaped plate to make the arc-shaped plate away from the fixed sleeve. The movement of the arc-shaped plate drives the positioning block to move, and the movement of the positioning block causes the dovetail block to move. At this time, the spring is in a compressed state. When the operator lowers the arc-shaped plate, the operator releases the arc-shaped plate. The positioning block drives the arc-shaped plate to move under the elastic force of the spring, so that the arc-shaped plate is closely attached to the dilatometer, thereby reducing the gap between the dilatometer and the arc-shaped plate, and further reducing the gap between the dilatometer and the inner wall of the preformed hole.

[0014] Preferably, a slider is provided on the end of the positioning block close to the fixed sleeve. An annular groove for sliding cooperation with the slider is formed on the outer surface of the upper end of the fixed sleeve. A plurality of first balls are rotatably installed on the slider, and the first balls are in rolling connection with the outer side wall of the fixed sleeve.

[0015] By adopting the above technical solution, the arrangement of the first balls facilitates the movement of the fixed slider, and the arrangement of the arc-shaped groove facilitates the accommodation of the slider. When the slider moves to the arc-shaped groove, the slider is inserted into the arc-shaped groove under the action of the spring force, thereby locking the position of the arc-shaped plate. At this time, the arc-shaped plate is close to the fixed sleeve, and the gap between the mounting table and the dilatometer is beneficial to the accommodation of the arc-shaped plate, so that the dilatometer can be closely attached to the inner wall of the preformed hole.

[0016] Preferably, a plurality of mounting grooves are spaced apart from each other at the bottom of the arc-shaped plate. Claws are rotatably installed on the inner side walls of the mounting grooves. The claws are inclined. A torsion spring is fixedly connected to the inner side wall of the mounting groove, and the other end of the torsion spring is fixedly connected to the claw.

[0017] By adopting the above technical solution, the inclined arrangement of the claws is beneficial to preventing the gravel that extends a certain distance from the inner wall of the preformed hole from damaging the dilatometer, and the arrangement of the torsion spring is beneficial to resetting the claws.

[0018] Preferably, a workbench is fixedly connected to the fixed sleeve. The mounting table is rotatably connected to the fixed sleeve. A rotating assembly for driving the mounting table to rotate is arranged on the workbench. The rotating assembly includes a worm installed on the workbench, a driving rod passing through the workbench, and an external gear ring fixedly connected to the mounting table. The driving rod is rotatably connected to the workbench. A worm gear for meshing with the worm is fixedly sleeved at one end of the driving rod, and a driving gear for meshing with the external gear ring is fixedly sleeved at the other end of the driving rod; a wire winding roller is fixedly sleeved on the worm, a ranging rope is wound around the wire winding roller, one end of the ranging rope is arranged on the wire winding roller, and the other end of the ranging rope is arranged outside the preformed hole.

[0019] By adopting the above technical solution, when the operator lowers the dilatometer, the ranging rope drives the worm to rotate, the rotation of the worm causes the worm gear to rotate, the rotation of the worm gear causes the driving rod to rotate, the rotation of the driving rod causes the driving gear to rotate, the rotation of the driving gear causes the external gear ring to rotate, and the rotation of the external gear ring drives the mounting table to rotate, and the rotation of the mounting table drives the arc-shaped plate to rotate, so that the dilatometer and the arc-shaped plate can be lowered more smoothly.

[0020] Preferably, an installation frame installed on the ground is provided at the end of the ranging rope away from the wire winding roller. A power motor is installed on the installation frame. A winding roller is fixedly connected to the output shaft of the power motor, and the winding roller is fixedly connected to the ranging rope.

[0021] By adopting the above technical solution, the operator starts the power motor, and the rotation of the output shaft of the power motor causes the winding roller to rotate. The winding roller winds the ranging rope, so that the dilatometer rises. The arrangement of the winding roller and the ranging rope facilitates the operator to adjust the position of the dilatometer, so that the dilatometer is accurately aligned with the position to be measured.

[0022] A dilatometer test method provided by this application adopts the following technical solution: It includes the following steps:

[0023] S1. Use a drilling machine to drill a preformed hole;

[0024] S2. Place the dilatometer into the preformed hole, and use the linear drive assembly to lower the arc plate. Multiple arc plates cooperate to protect the dilatometer;

[0025] S3. Lower the dilatometer, and the arc plate rotates as the dilatometer descends, thus ensuring that the dilatometer is not damaged by gravel;

[0026] S4. Use the linear drive assembly to retract the arc plate again, and then use the ranging rope to make the dilatometer reach the position to be measured;

[0027] S5. Use the pressurizing device and the dilatometer to measure data;

[0028] S6. Use the cooperation of the power motor, the winding roller and the ranging rope to recover the dilatometer.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. The operator moves the dilatometer downward along the preformed hole. When the dilatometer moves, the operator uses the linear drive assembly to move the arc plate. When the arc plate moves to the bottom end, multiple arc plates cooperate to surround the dilatometer. At this time, the arrangement of the arc plate is beneficial to prevent the gravel on the inner wall of the preformed hole from damaging the dilatometer. Before the dilatometer reaches the specified position, the operator uses the linear drive assembly to move the arc plate away again. The arrangement of the arc plate and the linear drive assembly is beneficial to ensure the normal progress of the dilatometer test;

[0031] 2. The arrangement of the first ball facilitates the movement of the fixed slider, and the arc groove is arranged to facilitate the accommodation of the slider. When the slider moves to the arc groove, the slider is inserted into the arc groove under the action of the spring force, so as to lock the position of the arc plate. At this time, the arc plate is close to the fixed sleeve, and the gap between the mounting table and the dilatometer is beneficial to accommodate the arc plate, so that the dilatometer can closely adhere to the inner wall of the preformed hole;

[0032] 3. When the operator lowers the dilatometer, the ranging rope drives the worm to rotate. The rotation of the worm causes the worm gear to rotate, the rotation of the worm gear causes the drive rod to rotate, the rotation of the drive rod causes the driving gear to rotate, the rotation of the driving gear causes the external gear ring to rotate, and the rotation of the external gear ring drives the mounting table to rotate. The rotation of the mounting table drives the arc plate to rotate, so that the dilatometer and the arc plate can be lowered more smoothly. Brief Description of the Drawings

[0033] Figure 1 is a schematic structural diagram of the dilatometer test device according to an embodiment of the present application.

[0034] Figure 2 is a schematic structural diagram of the rotating assembly according to an embodiment of the present application.

[0035] Figure 3 is a schematic structural diagram of the power component according to an embodiment of the present application.

[0036] Figure 4 is Figure 3 the enlarged schematic view of part A in

[0037] Figure 5 is a schematic structural diagram of the mounting bracket according to an embodiment of the present application.

[0038] Description of the Reference Numerals:

[0039] 1. Dilatometer; 11. Pipe; 12. Arc plate; 121. Installation groove; 122. Claw; 123. Connecting rod; 124. Torsion spring; 125. Spiral groove; 13. Fixed sleeve; 131. Annular groove; 2. Linear drive assembly; 21. Connecting plate; 211. Arc groove; 212. Second ball; 213. Dovetail groove; 22. Lead screw; 3. Mounting table; 31. Motor bracket; 4. Positioning block; 41. Slide block; 411. First ball; 42. Dovetail block; 43. Spring; 5. Power component; 51. Rotating gear; 52. Internal gear ring; 53. Driving motor; 54. Driving gear; 6. Workbench; 61. Rotating frame; 7. Rotating assembly; 71. Worm; 711. Wire winding roller; 712. Ranging rope; 72. Drive rod; 73. External gear ring; 74. Worm gear; 75. Driving gear; 8. Mounting bracket; 81. Mounting plate; 811. Communication hole; 82. Support leg; 83. Fixed plate; 831. Mounting hole; 84. Fixed frame; 85. Take-up roller; 86. Power motor; 87. Pressurizing device; 9. Predrilled hole. Detailed Description of the Embodiment

[0040] The following will further describe the present application in detail Figures 1-5 in conjunction with the accompanying drawings.

[0041] An embodiment of the present application discloses a dilatometer test device. Refer to Figure 1 , Figure 2, the pressuremeter testing device includes a pressuremeter 1, a pipeline 11, an arc-shaped plate 12, and a linear drive assembly 2 disposed in a preformed hole 9.

[0042] Referring to Figure 1 , Figure 2 , the pressuremeter 1 is cylindrical, the pipeline 11 is a flexible pipeline 11, one end of the pipeline 11 is connected to the pressuremeter 1, and the other end of the pipeline 11 extends out of the preformed hole 9. A fixed sleeve 13 is sleeved on the end of the pipeline 11 close to the pressuremeter 1, and the fixed sleeve 13 is fixedly connected to the upper surface of the pressuremeter 1. An installation platform 3 is sleeved on the fixed sleeve 13, and the installation platform 3 is rotatably connected to the fixed sleeve 13. An arc-shaped plate 12 is provided on the installation platform 3. There are two arc-shaped plates 12, and the two arc-shaped plates 12 are symmetrically arranged about the axis of the installation platform 3, and spiral grooves 125 are formed on the arc-shaped plates 12.

[0043] Referring to Figure 1 , Figure 2 , a linear drive assembly 2 for driving the arc-shaped plate 12 to move is provided on the installation platform 3. The linear drive assembly 2 includes a connecting plate 21 and a lead screw 22. The connecting plate 21 is horizontally arranged. An arc-shaped groove 211 is formed on the inner side wall of the connecting plate 21 close to the fixed sleeve 13. A plurality of second balls 212 are rotatably installed on the inner side wall of the arc-shaped groove 211. The second balls 212 are in rolling fit with the outer side wall of the fixed sleeve 13. The arrangement of the second balls 212 facilitates the movement of the connecting plate 21. The lead screw 22 is vertically arranged. The top end of the lead screw 22 is rotatably connected to the bottom surface of the installation platform 3, and the lead screw 22 passes through the connecting plate 21. The lead screw 22 is in threaded fit with the connecting plate 21.

[0044] Referring to Figure 3 , Figure 4 , a positioning block 4 is provided on the inner side wall of the arc-shaped plate 12 close to the fixed sleeve 13. The positioning block 4 is fixedly connected to the upper end of the arc-shaped plate 12, and a slider 41 is fixedly connected to the end of the positioning block 4 away from the arc-shaped plate 12. An annular groove 131 is formed on the outer surface of the upper end of the fixed sleeve 13. The slider 41 is in sliding fit with the inner side wall of the arc-shaped groove 211. The side of the slider 41 away from the positioning block 4 is arc-shaped, and a plurality of first balls 411 are rotatably installed on the side of the slider 41 away from the positioning block 4. The first balls 411 are in rolling connection with the outer surface of the fixed sleeve 13.

[0045] Referring to Figure 3 , Figure 4 , a dovetail block 42 is fixedly connected to the bottom surface of the positioning block 4. A dovetail groove 213 is formed on the connecting plate 21 along its own length direction. The dovetail block 42 is in sliding fit with the inner side wall of the dovetail groove 213. A spring 43 is fixedly connected to the side of the dovetail block 42 close to the arc-shaped plate 12. The end of the spring 43 away from the dovetail block 42 is fixedly connected to the inner side wall of the dovetail groove 213 close to the adjacent arc-shaped plate 12.

[0046] Refer to Figure 2 and Figure 3 , a power member 5 for driving the rotation of the lead screw 22 is provided on the installation table 3. The power member 5 includes a rotating gear 51, an internal gear ring 52, a driving motor 53 and a driving gear 54. The rotating gear 51 is sleeved on the upper end of the lead screw 22, and the rotating gear 51 is fixedly connected to the lead screw 22. There are two rotating gears 51, the two rotating gears 51 correspond to the two lead screws 22 one by one, and the two rotating gears 51 are both rotatably connected to the installation table 3. The internal gear ring 52 is rotatably installed on the bottom surface of the installation table 3, the axis of the internal gear ring 52 coincides with the axis of the fixed sleeve 13, and the rotating gear 51 meshes with the internal gear ring 52. A motor bracket 31 is fixedly connected to the bottom surface of the installation table 3, the driving motor 53 is installed on the motor bracket 31, and the output shaft of the driving motor 53 faces the installation table 3. The driving gear 54 is sleeved on the output shaft of the driving motor 53, the driving gear 54 is fixedly connected to the output shaft of the driving motor 53, and the driving gear 54 meshes with the internal gear ring 52.

[0047] Refer to Figure 2 and Figure 3 , the operator starts the driving motor 53, the output shaft of the driving motor 53 rotates to drive the driving gear 54 to rotate, the rotation of the driving gear 54 causes the internal gear ring 52 to rotate, the rotation of the internal gear ring 52 drives the two rotating gears 51 to rotate, and the rotation of the rotating gear 51 causes the lead screw 22 to rotate. The rotation of the lead screw 22 drives the connecting plate 21 to move along the length direction of the lead screw 22. Combining Figure 4 as shown, when the connecting plate 21 moves upward, the movement of the connecting plate 21 drives the positioning block 4 to rise. At this time, the spring 43 is in a compressed state. When the positioning block 4 moves to the annular groove 131, the dovetail block 42 moves under the action of the spring 43. The movement of the dovetail block 42 drives the positioning block 4 to move, and the positioning block 4 causes the slider 41 to insert into the annular groove 131. The cooperation between the annular groove 131 and the slider 41 is beneficial to fixing the height of the arc plate 12 on the one hand. On the other hand, the movement of the positioning block 4 drives the arc plate 12 to move, and the movement of the arc plate 12 is beneficial to reducing the contact between the arc plate 12 and the inner wall of the preformed hole 9, so that the dilatometer 1 contacts the inner wall of the preformed hole 9, making the measurement of the dilatometer 1 more accurate. The setting of the first ball 411 is beneficial to reducing the friction between the slider 41 and the outer surface of the fixed sleeve 13, and further making the movement of the arc plate 12 smoother.

[0048] Refer to Figure 2 and Figure 3, a plurality of mounting grooves 121 are formed in the bottom of the arc-shaped plate 12, and the plurality of mounting grooves 121 are arranged at intervals. A plurality of clamping claws 122 are obliquely arranged at the bottom of the arc-shaped plate 12. The clamping claws 122 correspond to the mounting grooves 121 one by one, and a connecting rod 123 is inserted through the end of the clamping claw 122 close to the arc-shaped plate 12. The connecting rod 123 is fixedly connected to the clamping claw 122, and the connecting rod 123 is rotatably connected to the arc-shaped plate 12. A torsion spring 124 is sleeved on the connecting rod 123. One end of the torsion spring 124 is fixedly connected to the arc-shaped plate 12, and the other end of the torsion spring 124 is fixedly connected to the clamping claw 122. The arrangement of the clamping claws 122 helps to prevent obstacles protruding from the inner wall of the preformed hole 9 from damaging the dilatometer 1, and the arrangement of the torsion spring 124 facilitates the reset of the clamping claws 122.

[0049] Referring to Figure 2 , Figure 3 , a workbench 6 is sleeved on the fixed sleeve 13. The workbench 6 is fixedly connected to the fixed sleeve 13, and the workbench 6 is arranged above the mounting table 3. A rotating assembly 7 for driving the mounting table 3 to rotate is arranged on the workbench 6. The rotating assembly 7 includes a worm 71, a driving rod 72 and an external gear ring 73. A rotating frame 61 for mounting the worm 71 is arranged on the workbench 6. There are two rotating frames 61, and the two rotating frames 61 are symmetrically arranged about the axis of the workbench 6. There are two worms 71, and the two rotating frames 61 correspond to the two worms 71 one by one, and the rotating frame 61 is rotatably connected to the worm 71. The driving rod 72 is vertically inserted through the workbench 6, and the driving rod 72 is rotatably connected to the workbench 6. A worm gear 74 is fixedly sleeved on the end of the driving rod 72 close to the worm 71, and the worm 71 meshes with the worm gear 74. A driving gear 75 is arranged on the end of the driving rod 72 away from the worm gear 74, and the driving gear 75 is fixedly connected to the driving rod 72.

[0050] Referring to Figure 2 , Figure 3 , the external gear ring 73 is arranged on the mounting table 3. The external gear ring 73 is fixedly connected to the mounting table 3, and the external gear ring 73 meshes with the driving gear 75. The operator rotates the worm 71. The rotation of the worm 71 causes the worm gear 74 to rotate. The rotation of the worm gear 74 causes the driving rod 72 to rotate. The rotation of the driving rod 72 causes the driving gear 75 to rotate. The rotation of the driving gear 75 causes the external gear ring 73 to rotate. The rotation of the external gear ring 73 causes the mounting table 3 to rotate. The rotation of the mounting table 3 drives the arc-shaped plate 12 to rotate.

[0051] Referring to Figure 1 , Figure 2, a wire winding roller 711 is sleeved on each of the worm gears 71. The wire winding roller 711 is fixedly connected to the worm gear 71. A ranging rope 712 is arranged on the wire winding roller 711. One end of the ranging rope 712 is fixedly connected to the wire winding roller 711, and the other end of the ranging rope 712 extends outside the preformed hole 9. An installation frame 8 is arranged at the end of the ranging rope 712 extending outside the preformed hole 9. The installation frame 8 includes an installation plate 81 and support legs 82. A communication hole 811 for passing through the pipeline 11 is formed in the installation plate 81, and a pressurizing device 87 for pressurizing the pressuremeter 1 through the pipeline 11 is installed on the upper surface of the installation plate 81. One end of the support leg 82 is fixedly connected to the installation plate 81, and the other end of the support leg 82 is fixedly connected to the ground. There are two support legs 82, and the two support legs 82 are symmetrically arranged about the axis of the communication hole 811.

[0052] Referring to Figure 1 , Figure 5 , fixing plates 83 are fixedly connected to both of the two support legs 82, a fixing frame 84 is fixedly connected to the upper surface of the installation plate 81, and a winding roller 85 is rotatably installed on the fixing frame 84. Installation holes 831 for passing through the ranging rope 712 are formed in the two fixing plates 83. The installation holes 831 correspond to the ranging ropes 712 one by one. The end of the ranging rope 712 extending out of the preformed hole 9 passes through the installation hole 831 and is fixedly connected to the winding roller 85. A power motor 86 is fixedly connected to the fixing frame 84, and the output shaft of the power motor 86 is fixedly connected to the winding roller 85. The operator starts the power motor 86. The rotation of the output shaft of the power motor 86 causes the winding roller 85 to rotate. The rotation of the winding roller 85 facilitates the operator to wind the ranging rope 712, and further facilitates the operator to control the position of the pressuremeter 1.

[0053] The embodiment of the present application also discloses a pressuremeter test method, including the following steps:

[0054] S1. The operator first drills a preformed hole 9 at a predetermined position by using a drilling machine;

[0055] S2. The operator places the pressuremeter 1 into the preformed hole 9. Then, the operator starts the driving motor 53. The driving motor 53 makes the rotating gear 51 and the lead screw 22 rotate through the cooperation of the driving gear 54 and the internal gear ring 52. The rotation of the lead screw 22 makes the connecting plate 21 move. The movement of the moving plate makes the positioning plate and the arc plate 12 move. The arc plate 12 descends beside the pressuremeter 1, and multiple arc plates 12 cooperate to protect the pressuremeter 1;

[0056] S3. The operator lowers the dilatometer 1. The lowering of the dilatometer 1 causes the ranging rope 712 on the wire winding roller 711 to extend. The worm 71 rotates as the ranging rope 712 extends. The cooperation between the worm 71 and the worm gear 74 causes the drive rod 72 to rotate. The drive gear 54, through the cooperation between the driving gear 75 and the external gear ring 73, causes the mounting table 3 to rotate, so that the arc-shaped plate 12 rotates as the dilatometer 1 descends, thereby ensuring that the dilatometer 1 is not damaged by the crushed stones.

[0057] S4. When the dilatometer 1 descends to a certain distance from the position to be measured, the operator uses the linear drive assembly 2 to retract the arc-shaped plate 12 again. Then, the operator uses the ranging rope 712 to move the dilatometer 1 to the position to be measured.

[0058] S5. The operator uses the pressurizing device 87 and the dilatometer 1 to measure data.

[0059] S6. The operator starts the power motor 86. The power motor 86, through the cooperation between the winding roller 85 and the ranging rope 712, retracts the dilatometer 1.

[0060] The above are all the preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A pressuremeter testing device, comprising a pressuremeter (1) inserted into a preformed hole (9) and a pipeline (11) communicated with the pressuremeter (1). Characterized in that: A fixed sleeve (13) for fixedly connecting with the pressuremeter (1) is sleeved on the pipeline (11), an installation platform (3) is sleeved on the fixed sleeve (13), a plurality of arc-shaped plates (12) are arranged around the lower part of the installation platform (3), the arc-shaped plates (12) are in sliding fit with the inner side wall of the preformed hole (9), a linear driving assembly (2) for driving the arc-shaped plates (12) to move along the axis direction of the preformed hole (9) is arranged on the installation platform (3), and the linear driving assembly (2) enables the arc-shaped plates (12) to reciprocate between the lower part of the installation platform (3) and the position surrounding the pressuremeter (1); The linear driving assembly (2) includes a connecting plate (21) correspondingly arranged inside the arc-shaped plate (12) and driving the arc-shaped plate (12) to move linearly, and a lead screw (22) inserted through the connecting plate (21), the lead screw (22) is in threaded fit with the connecting plate (21), multiple groups of the linear driving assembly (2) are arranged, the linear driving assembly (2) corresponds to the arc-shaped plate (12) one by one, and a power member (5) for driving the lead screw (22) to rotate is arranged on the installation platform (3).

2. A pressuremeter testing device according to claim 1, Characterized in that: The power member (5) includes an internal gear ring (52) rotatably installed on the installation platform (3), a motor bracket (31) arranged on the installation platform (3), and a driving motor (53) installed on the motor bracket (31), a rotating gear (51) is fixedly sleeved on each lead screw (22), the rotating gear (51) meshes with the internal gear ring (52), and a driving gear (54) is fixedly sleeved on the output shaft of the driving motor (53), the driving gear (54) meshes with the internal gear ring (52).

3. A pressuremeter testing device according to claim 1, Characterized in that: A positioning block (4) is arranged on the inner side wall of the arc-shaped plate (12) close to the fixed sleeve (13), the positioning block (4) is fixedly connected with the upper end of the arc-shaped plate (12), a dovetail block (42) is fixedly connected to the positioning block (4), a dovetail groove (213) for slidingly cooperating with the dovetail block (42) is formed in the connecting plate (21), a spring (43) is fixedly connected to the dovetail block (42), and one end of the spring (43) far away from the dovetail block (42) is fixedly connected with the inner end face of the dovetail groove (213).

4. A pressuremeter testing device according to claim 3, Characterized in that: A slider (41) is provided at the end of the positioning block (4) close to the fixed sleeve (13). An annular groove (131) for slidingly cooperating with the slider (41) is formed on the outer surface of the upper end of the fixed sleeve (13). A plurality of first balls (411) are rotatably mounted on the slider (41), and the first balls (411) are in rolling connection with the outer side wall of the fixed sleeve (13).

5. A lateral pressure test device according to claim 1, characterized in that: A plurality of mounting grooves (121) are spaced apart at the bottom of the arc-shaped plate (12). A clamping jaw (122) is rotatably mounted on the inner side wall of the mounting groove (121). The clamping jaw (122) is inclined. A torsion spring (124) is fixedly connected to the inner side wall of the mounting groove (121), and the other end of the torsion spring (124) is fixedly connected to the clamping jaw (122).

6. A lateral pressure test device according to claim 1, characterized in that: A workbench (6) is fixedly connected to the fixed sleeve (13). The mounting table (3) is rotatably connected to the fixed sleeve (13). A rotating assembly (7) for driving the mounting table (3) to rotate is provided on the workbench (6). The rotating assembly (7) includes a worm (71) mounted on the workbench (6), a driving rod (72) passing through the workbench (6), and an external gear ring (73) fixedly connected to the mounting table (3). The driving rod (72) is rotatably connected to the workbench (6). A worm gear (74) for meshing with the worm (71) is fixedly sleeved at one end of the driving rod (72), and a driving gear (75) for meshing with the external gear ring (73) is fixedly sleeved at the other end of the driving rod (72); A winding roller (711) is fixedly sleeved on the worm (71), and a ranging rope (712) is wound around the winding roller (711). One end of the ranging rope (712) is arranged on the winding roller (711), and the other end of the ranging rope (712) is arranged outside the preformed hole (9).

7. A lateral pressure test device according to claim 6, characterized in that: An installation frame (8) installed on the ground is provided at the end of the ranging rope (712) away from the winding roller (711). A power motor (86) is installed on the installation frame (8). A winding roller (85) is fixedly connected to the output shaft of the power motor (86), and the winding roller (85) is fixedly connected to the ranging rope (712).

8. A lateral pressure test method based on the lateral pressure test device according to claim 7, characterized in that: It includes the following steps: S1. Use a drilling machine to drill a preformed hole (9); S2. Place the dilatometer (1) into the preformed hole (9), and use the linear drive assembly (2) to lower the arc-shaped plate (12), and the arc-shaped plate (12) cooperates to surround the dilatometer (1); S3. Lower the dilatometer (1), and the arc-shaped plate (12) rotates as the dilatometer (1) descends, so as to ensure that the dilatometer (1) is not damaged by gravel; S4. Use the linear drive assembly (2) to retract the arc-shaped plate (12) again, and then use the ranging rope (712) to move the dilatometer (1) to the position to be measured; S5. Use the pressurizing device (87) and the dilatometer (1) to measure data; S6. Use the cooperation of the power motor (86), the winding roller (85) and the ranging rope (712) to recover the dilatometer (1).

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