Pile foundation bearing capacity detection device and detection method thereof

Abstract

The application provides a pile bearing capacity detection device and a detection method thereof, and relates to the technical field of single pile vertical compression static load test. The device comprises a foundation pile, a stabilizing set, a sliding rail, an elongated bearing table, a beam frame, a counterweight beam connecting rod, a cam piece, a fixed frame, a sliding push block, a counterweight block, a two-way telescopic rod, a sliding bearing box, a mechanical claw assembly and a hydraulic telescopic piece. By setting the sliding bearing box, the elongated bearing table and improving the connecting structure between the elongated bearing table and the counterweight block in the sliding bearing box, the user can increase the load by using the grabbing structure composed of the hydraulic telescopic piece and the mechanical claw assembly one by one. In the whole process, large hoisting equipment is basically not needed, thereby the safety of the device can be improved, the hoisting process time can be reduced, the test efficiency can be improved, and especially when multiple foundation piles are tested, the efficiency can be improved by more than 5 times.

Description

Technical Field

[0001] The present invention relates to the technical field of single pile vertical compressive static load testing, in particular to a pile foundation bearing capacity detection device and a detection method thereof. Background Art

[0002] Most foundation piles are subjected to downward pressure during use. In order to ensure the stability of the building, it is necessary to determine the ultimate vertical compressive bearing capacity of a single pile. Generally, a single pile vertical compressive static load test is adopted, that is, the vertical load is evenly transferred to the foundation pile of the building. By measuring the settlement of the pile top under different loads, the Q-s curve and auxiliary curves such as s-l gt of the static load test are obtained. Then, the characteristic value of the vertical compressive bearing capacity of the single pile and other parameters are deduced based on the curve.

[0003] When applying for this invention, the applicant searched and discovered a Chinese patent application titled "A Pile Foundation Bearing Capacity Testing Device and Method Thereof," with application number "202011514467.X." This patent includes two opposing guide seats, a plurality of piles positioned between the two guide seats, a jack positioned at the top of the piles, a load sensor connected to the piston rod of the jack, a bearing platform positioned above the load sensor, two rows of iron columns positioned opposite each other at the bottom of the bearing platform, and pulleys connected to the bottom ends of the iron columns. The bottom of the bearing platform is equipped with support columns for contacting the load sensors. The tops of the support columns are provided with mounting assemblies and fixed to the bottom of the bearing platform. The sidewalls of the bearing platform are provided with lifting holes for the iron columns to pass through. Electromagnetic holders for supporting the bearing platform are adsorbed on the iron columns. A chute for sliding the pulley is provided on the upper surface of the guide seat along its length, and within the chute is a fixing assembly for securing the pulley. This device facilitates the sequential testing of multiple piles without requiring manual re-platforming, saving time and effort and improving testing efficiency.

[0004] The above patent does not require repeated platform construction during use, but it still requires lifting heavy objects onto the bearing platform, which requires the use of large-scale lifting equipment. In order to be able to quickly and efficiently conduct bearing capacity tests on multiple piles in a single row, the applicant combined the existing technology and invented a pile foundation bearing capacity detection device and its detection method, which have good use effect and can complete bearing capacity tests without the use of lifting equipment. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides a pile foundation bearing capacity detection device and a detection method thereof, which solves the problem that the existing pile foundation bearing capacity detection experiment requires the use of large lifting equipment and the use process is relatively complicated, time-consuming and labor-intensive.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a pile foundation bearing capacity detection device, comprising a foundation pile, a stabilization kit, a slide rail, and an elongated bearing platform, wherein the stabilization kit is fixedly sleeved on the top of the foundation pile, the slide rail is linearly arranged along the distribution direction of the foundation pile, the bottom of the elongated bearing platform is slidably connected to the top of the stabilization kit, and the slidable direction of the elongated bearing platform and the stabilization kit is perpendicular to the length direction of the elongated bearing platform, and further comprising:

[0007] Beam, the top of the elongated supporting platform and near both ends are provided with mounting grooves, two beams are provided, respectively installed inside the two mounting grooves, and one end of the beam is movably connected to the inner bottom of the mounting groove near the middle position of the elongated supporting platform;

[0008] A cam member, the cam member is located inside the mounting groove and below the beam frame, and both ends of the cam member have shaft members, the shaft member is movably connected to the elongated bearing platform through a shaft seat, and the end of the shaft member is fixedly connected to the handle frame;

[0009] A fixed frame, the bottom of which is fixedly connected to the top of the elongated supporting platform, and the inner hole of the fixed frame is along the length direction of the elongated supporting platform, the inner side of the fixed frame and near both ends are slidably connected to sliding push blocks, and a two-way telescopic rod is fixedly connected between the two sliding push blocks;

[0010] A sliding bearing box, wherein the bottom of the sliding bearing box is provided with a slider structure cooperating with the slide rail, and a plurality of counterweight blocks are provided inside the sliding bearing box, wherein the plurality of counterweight blocks are distributed in a vertical direction, and two adjacent counterweight blocks can be fixed by an I-shaped connecting piece, and the top of the topmost counterweight block is fixedly connected to a counterweight beam connecting rod, and the top end of the counterweight beam connecting rod is movably connected to an end of the beam frame away from the middle position of the elongated bearing platform;

[0011] A mechanical claw assembly, the mechanical claw assembly being slidably disposed on the inner side of the sliding bearing box, the mechanical claw assembly being capable of grasping the counterweight;

[0012] A hydraulic telescopic component, wherein the main body of the hydraulic telescopic component is fixedly connected to the top of the sliding bearing box, and the telescopic end of the hydraulic telescopic component is fixedly connected to the mechanical claw assembly.

[0013] Preferably, a conical notch and a straight notch are provided on the side of the counterweight block, the conical notch is a structure with a larger upper portion and a smaller lower portion, the top of the conical notch passes through the top of the counterweight block, the bottom of the conical notch is connected to the top of the straight notch, and the bottom of the straight notch passes through the bottom of the counterweight block, a second vertical sliding hole is provided on the side of the sliding bearing box, and the mechanical claw assembly includes:

[0014] A mechanical claw frame, wherein the length of the mechanical claw frame is less than the length of the bottom end of the conical notch, a long sliding hole is provided on the top of the mechanical claw frame, a sliding gap is provided on one side of the mechanical claw frame close to the side of the sliding bearing box, a mounting plate is fixedly connected to one side of the mechanical claw frame close to the side of the sliding bearing box and located above the sliding gap, and the telescopic end of the hydraulic telescopic member is fixedly connected to the mechanical claw frame;

[0015] A first telescopic rod and a second telescopic rod, one end of the first telescopic rod extends into the inner side of the mechanical claw frame, and the first telescopic rod is slidably connected to the mechanical claw frame, a second limiting slider is fixedly connected to the side of the first telescopic rod and located inside the long sliding hole, one end of the second telescopic rod extends into the inner side of the mechanical claw frame, and the second telescopic rod is slidably connected to the mechanical claw frame, and a first limiting slider is fixedly connected to the side of the second telescopic rod and located inside the long sliding hole; the first telescopic rod and the second telescopic rod are respectively located at two ends of the mechanical claw frame, and a spring is provided on the inner side of the mechanical claw frame and between the first telescopic rod and the second telescopic rod;

[0016] A first push block and a second push block, wherein the first push block and the second push block are both located inside the long slide hole, are slidably connected to the long slide hole, and are located outside the second limit slider and the first limit slider;

[0017] An upper rack and a lower rack, wherein a tooth portion is provided below the upper rack, one end of the upper rack is fixedly connected to the first push block via a first connecting frame, the first connecting frame is located inside the sliding gap, and a tooth portion is provided above the lower rack, one end of the lower rack is fixedly connected to the second push block via a second connecting frame, the second connecting frame is located inside the sliding gap;

[0018] A gear shaft, one end of which is rotatably connected to the mounting plate, a side of which is fixedly connected to a driving gear, the driving gear being located between the upper rack and the lower rack and meshing with both the upper rack and the lower rack;

[0019] A sliding block is slidably connected to the second vertical sliding hole, the sliding block is fixedly connected to the mounting plate, the gear shaft passes through the sliding block, and the end of the gear shaft away from the mounting plate is fixedly connected to a handwheel disk.

[0020] Preferably, the counterweight block is provided with a conical notch and a straight notch on two symmetrical side surfaces, and there are two hydraulic telescopic parts and two mechanical claw assemblies, and the main parts of the two hydraulic telescopic parts are fixed by a connecting frame.

[0021] Preferably, a reinforcement beam is fixedly connected to the top of the beam frame, and the sliding push block is slidably connected to the reinforcement beam.

[0022] Preferably, the bottom end of the stabilizing kit is open, a reinforcing steel pad is provided on the inner top of the stabilizing kit, and a fastening nail is threadedly connected to the side of the stabilizing kit.

[0023] Preferably, a first vertical sliding hole is provided on a side of the sliding bearing box close to the foundation pile, a screw is fixedly connected to the side of the counterweight block, one end of the screw passes through the first vertical sliding hole and extends to the outside of the sliding bearing box, a limiting plate is provided on the screw and located on the outside of the sliding bearing box, a through hole corresponding to the screw is provided on the side of the limiting plate, the end of the screw is threadedly connected to a limiting sleeve located on the outside of the limiting plate, and a roller is provided on the side of the limiting plate.

[0024] Preferably, the side of the sliding bearing box away from the foundation pile is set to be an opening, the side of the opening is provided with a bayonet, and a limiting rod is provided inside the bayonet, and the number of the limiting rods and bayonet is the same as the number of counterweight blocks.

[0025] Preferably, a top circular hole is opened on the top of the sliding bearing box, a vertical hole is opened on the inner bottom of the installation groove, and the counterweight beam connecting rod is located inside the top circular hole and the vertical hole.

[0026] Preferably, the top and bottom ends of the counterweight block are provided with step grooves, the inner side of the step groove is fixedly connected to a step plate, the end of the step plate close to the end counterweight block is provided with a round hole, the end of the step plate away from the counterweight block is provided with a long hole, and the top of the counterweight block is fixedly connected to a top plate.

[0027] A pile foundation bearing capacity detection method using the above-mentioned pile foundation bearing capacity detection device;

[0028] The installation steps include:

[0029] Step 1: linearly arrange the slide rails along the distribution direction of the foundation piles, place the unloaded sliding bearing box on the slide rails, and allow the sliding bearing box and the slide rails to slide;

[0030] Step 2: Load the counterweight into the sliding bearing box, and install the stabilization kit and the long bearing platform on the top of the first foundation pile to be tested;

[0031] Step 3: Slide the sliding bearing box along the slide rail to the bottom of the end of the long bearing platform, and use pins to connect the top of the counterweight beam connecting rod to the end of the beam frame, and then perform the pile bearing capacity test;

[0032] The test steps include:

[0033] S1. Manipulate the handle frame to rotate the cam, supporting the beam in an inclined state. At this time, one end of the beam rises, driving the counterweight beam connecting rod to move upward as a whole, so that the top counterweight block is hoisted. Then, use the hydraulic telescopic member to control the mechanical claw assembly to grab the counterweight block on the second layer. After lifting it, use the I-shaped connector to connect the hoisted counterweight block on the second layer to the top counterweight block. Repeat this operation to connect the counterweight blocks on the third, fourth, ... Nth layers to the counterweight block above, until the predetermined load capacity is met;

[0034] S2. Use auxiliary equipment to measure the settlement of the pile top and obtain the Q-s curve of the static load test, where Q represents the load weight and s represents the depth of pile settlement;

[0035] S3. After the first pile test is completed, the user manipulates the handle frame to rotate the cam member, causing all the counterweights to fall simultaneously. The user then controls the bidirectional telescopic rod to extend, pushing the sliding push block to slide outward. The sliding push block restrains the top of the beam frame from above, causing the beam frame to rotate from the angle toward the horizontal direction, while driving the elongated supporting platform 4 to move upward and disengage from the stabilizing kit.

[0036] S4. The construction personnel remove the stabilization kit from the top of the first pile to be tested, and install it on the top of the second pile to be tested. The construction personnel use the track to move the sliding bearing box and the long bearing platform again to align them with the stabilization kit on the top of the second pile to be tested. The two-way telescopic rod is controlled to retract so that the long bearing platform falls onto the stabilization kit on the top of the second pile to be tested, and the bearing capacity test of the second pile to be tested is carried out. This operation is repeated to carry out bearing capacity tests on all the piles to be tested.

[0037] The present invention provides a pile foundation bearing capacity detection device and a detection method thereof, which have the following beneficial effects:

[0038] 1. In the present application, by setting up a sliding bearing box, an elongated bearing platform and improving the connection structure between the elongated bearing platform and the counterweight block inside the sliding bearing box, the user can increase the load of the counterweight block one by one using the grasping structure composed of a hydraulic telescopic part and a mechanical claw assembly, so that the tester can better realize the influence of different static loads on the sinking amount of the pile foundation, thereby being able to more easily obtain the Q-s curve and predict and analyze the bearing capacity of the pile foundation; and the present device is a bearing capacity detection device based on the bottom slide rail, which can quickly move the entire device along the track to facilitate the detection of all the pile foundations in the site, thereby achieving fast and efficient detection, and basically no large-scale lifting equipment is required during the entire process (the sliding bearing box is put into the track and the loading of the counterweight block only requires a small lifting equipment or a forklift to complete), thereby improving the safety of the device, reducing the lifting process time, and improving the efficiency of the test, especially when testing multiple pile foundations, its efficiency can be increased by more than 5 times.

[0039] 2. The present application improves the connection structure of the elongated supporting platform, which is specifically composed of a beam frame, a cam member, a fixed frame, a sliding push block, and a bidirectional telescopic rod. The cam member is used to drive the beam frame to increase its inclination angle, so that it can lift the topmost counterweight block, which is convenient for subsequent stacking of counterweight blocks (fixing the counterweight blocks upward layer by layer to increase the load). The sliding push block and the bidirectional telescopic rod structure are used to limit the inclination of the beam frame, so that it is in a horizontal state, which can drive the elongated supporting platform to move upward as a whole, realize the separation of the elongated supporting platform and the stabilization kit, and facilitate the overall movement of the entire detection device to the next pile foundation to be detected.

[0040] 3. The present application improves the structure of the mechanical claw assembly, and sets a conical notch and a straight notch on the side of the counterweight block. The mechanical claw assembly has two elastically extended telescopic rods (a first telescopic rod and a second telescopic rod). When it moves downward, it can cooperate with the side of the conical notch to squeeze it and retract it. When it reaches the straight notch, it will automatically extend again. This structure can be quickly clamped on the side of the counterweight block, and the counterweight block can be quickly lifted upward in cooperation with the hydraulic telescopic part. The lifted counterweight block is connected to the counterweight block suspended above in cooperation with the I-shaped connecting piece, which can quickly increase the load. In addition, a forced return structure consisting of a gear and a double rack is set. The user rotates the gear shaft (the gear shaft can be rotated directly by using a handwheel) to drive the drive gear to rotate, so that the upper rack and the lower rack move inward at the same time, driving the two elastically extended telescopic rods (the first telescopic rod and the second telescopic rod) to retract, so that it can quickly move to the top. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is an overall three-dimensional diagram of the pile foundation bearing capacity detection device proposed by the present invention;

[0042] Figure 2 This is a front view of the pile foundation bearing capacity detection device proposed by the present invention;

[0043] Figure 3 A top view of the pile foundation bearing capacity detection device proposed by the present invention;

[0044] Figure 4 for Figure 2 Sectional view of the section line at AA;

[0045] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0046] Figure 6 A three-dimensional schematic diagram of a sliding bearing box of the pile foundation bearing capacity detection device proposed by the present invention;

[0047] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0048] Figure 8 This is a schematic diagram of the coordination between the counterweight and the mechanical claw of the pile foundation bearing capacity detection device proposed by the present invention;

[0049] Figure 9 for Figure 8 Enlarged view of point D in the middle;

[0050] Figure 10 A three-dimensional diagram of the mechanical claw frame of the pile foundation bearing capacity detection device proposed by the present invention;

[0051] Figure 11 This is a schematic diagram of the connection between two adjacent counterweights of the pile foundation bearing capacity detection device proposed by the present invention.

[0052] Among them, 1. foundation pile; 2. stabilization kit; 3. fastening nail; 4. elongated bearing platform; 5. mounting groove; 6. beam frame; 7. reinforcement beam; 8. cam member; 9. handle frame; 10. vertical hole; 11. counterweight beam connecting rod; 12. fixing frame; 13. sliding push block; 14. two-way telescopic rod; 15. sliding bearing box; 16. top round hole; 17. counterweight block; 18. first vertical sliding hole; 19. screw; 20. limiting plate; 21. through hole; 22. limiting sleeve; 23. roller; 24. bayonet; 25. limiting rod; 26. top plate; 27. cone shaped notch; 28. Straight notch; 29. ​​Mechanical claw frame; 30. Long sliding hole; 31. Sliding gap; 32. First telescopic rod; 33. Second telescopic rod; 34. First limit slider; 35. Second limit slider; 36. Spring; 37. First push block; 38. Second push block; 39. Upper rack; 40. Lower rack; 41. Mounting plate; 42. Gear shaft; 43. Drive gear; 44. Sliding block; 45. Hydraulic telescopic part; 46. Second vertical sliding hole; 47. Handwheel; 48. Step groove; 49. Step plate; 50. I-shaped connector. DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] Example 1:

[0055] like Figures 1-11 As shown, an embodiment of the present invention provides a pile foundation bearing capacity detection device, including a foundation pile 1, a stabilization kit 2, a slide rail, an elongated bearing platform 4, a beam frame 6, a counterweight beam connecting rod 11, a cam member 8, a fixed frame 12, a sliding push block 13, a counterweight block 17, a bidirectional telescopic rod 14, a sliding bearing box 15, a mechanical claw assembly, and a hydraulic telescopic member 45.

[0056] Among them, the stabilizing kit 2 is fixedly sleeved on the top of the foundation pile 1, and the bottom end of the stabilizing kit 2 is open and can be sleeved on the top of the foundation pile 1. The inner top of the stabilizing kit 2 is provided with a reinforced steel pad to balance the load force and avoid damage to part of the foundation pile. The side of the stabilizing kit 2 is threadedly connected with a fastening nail 3. The fastening nail 3 is located at one end of the stabilizing kit 2 and has a handwheel. By rotating the fastening nail 3, the end of the fastening nail 3 is pressed against the side of the foundation pile, thereby realizing a quick fixed connection between the stabilizing kit 2 and the foundation pile 1. The slide rail is linearly arranged along the distribution direction of the foundation pile 1, and the slide rail is arranged There are two tracks, and the spacing between the tracks corresponds to the two sliding bearing boxes 15. The bottom of the elongated bearing platform 4 is slidably connected to the top of the stabilizing kit 2, and the sliding direction of the elongated bearing platform 4 and the stabilizing kit 2 is perpendicular to the length direction of the elongated bearing platform 4, that is, the bottom of the elongated bearing platform 4 is provided with a trapezoidal opening, and the top of the stabilizing kit 2 is provided with a trapezoidal block, and the two can be well connected together. This connection structure can make the middle position of the elongated bearing platform 4 just above the stabilizing kit 2, avoiding the problem of safety accidents caused by uneven force at both ends of the elongated bearing platform 4 during use.

[0057] Mounting grooves 5 are provided at the top and near both ends of the elongated supporting platform 4. Two beams 6 are provided, which are respectively installed inside the two mounting grooves 5, and one end of the beam 6 is movably connected to the inner bottom of the mounting groove 5 near the middle position of the elongated supporting platform 4. It is preferably connected by a steel pin. After the connection, the beam 6 can rotate along the axis of the steel pin and be in an inclined state. Generally, the inclination angle of the beam 6 is about 8-14°, and the length of the beam 6 is 1-2M. During the process, the up and down adjustment range of the end of the beam 6 away from the foundation pile 1 is about 10CM.

[0058] The cam member 8 is located inside the mounting groove 5 and below the beam 6. Both ends of the cam member 8 have shaft members. The shaft member is movably connected to the elongated supporting platform 4 through an axle seat. The end of the shaft member is fixedly connected to a handle frame 9. The user manipulates the handle frame 9 to control the rotation of the cam member 8. The hand frame 9 is equivalent to a force-adding structure with a length of about 1M. The rotation of the cam member 8 can drive the inclination angle of the beam 6 to increase, that is, the beam 6 moves upward away from the end of the foundation pile 1. Using the structure here, the user can easily lift the first counterweight 17.

[0059] The bottom of the fixed frame 12 is fixedly connected to the top of the elongated supporting platform 4, and the inner hole of the fixed frame 12 is along the length direction of the elongated supporting platform 4. The inner side of the fixed frame 12 and near the two ends are slidably connected with sliding push blocks 13, and a two-way telescopic rod 14 is fixedly connected between the two sliding push blocks 13; when the two-way telescopic rod 14 is extended, it can push the sliding push block 13 to move outward, so that the beam frame 6 can rotate from the inclined to the horizontal direction (the inclination angle of the beam frame 6 is reduced). At this time, since the bottom end of the counterweight beam connecting rod 11 is in a fixed state, the elongated supporting platform 4 can be moved upward for a distance as a whole, so that it can quickly break away from the stabilization kit 2.

[0060] like Figure 3 As shown, the bottom of the sliding bearing box 15 is provided with a slider structure that cooperates with the sliding rail, and the interior of the sliding bearing box 15 is provided with a plurality of counterweight blocks 17, which are distributed in the vertical direction, and the upper and lower adjacent counterweight blocks 17 can be fixed by an I-shaped connecting piece 50. The top of the counterweight block 17 located at the top is fixedly connected to the counterweight beam connecting rod 11, and the top end of the counterweight beam connecting rod 11 is movably connected to the end of the beam frame 6 away from the middle position of the elongated bearing platform 4.

[0061] As needed, the counterweight 17 is moved upward and fixedly connected to the counterweight 17 above it via the counterweight beam connecting rod 11, thereby increasing the number of counterweights 17 in actual use and applying a static load to the foundation pile. The counterweight 17 is externally a steel plate structure and internally filled with high-density sand and gravel. The load in the present invention is a vertical static load applied to both ends of the counterweight beam by means of a suspended weight.

[0062] The mechanical claw assembly is slidably arranged on the inner side of the sliding bearing box 15, and the mechanical claw assembly can grasp the counterweight block 17; the main body of the hydraulic telescopic component 45 is fixedly connected to the top of the sliding bearing box 15, and the telescopic end of the hydraulic telescopic component 45 is fixedly connected to the mechanical claw assembly.

[0063] The user controls the hydraulic telescopic part 45 to drive the mechanical claw assembly to move up and down, move the counterweight block 17 below upward, and cooperate with the I-shaped connecting part 50 to fix the moved counterweight block 17 with the counterweight block 17 above that is in a load-applying state, thereby achieving the purpose of increasing the load.

[0064] In one embodiment, a conical notch 27 and a straight notch 28 are provided on the side of the counterweight block 17. The conical notch 27 is a structure with a larger upper portion and a smaller lower portion. The top of the conical notch 27 passes through the top of the counterweight block 17, and the bottom end of the conical notch 27 is connected to the top of the straight notch 28. The bottom end of the straight notch 28 passes through the bottom of the counterweight block 17. A second vertical sliding hole 46 is provided on the side of the sliding bearing box 15.

[0065] Specifically, the mechanical claw assembly includes: a mechanical claw frame 29, a first telescopic rod 32, a second telescopic rod 33, a first push block 37, a second push block 38, an upper rack 39, a lower rack 40, a gear shaft 42, and a sliding block 44.

[0066] The length of the mechanical claw frame 29 is smaller than the length of the bottom end of the conical notch 27, so that it can freely pass through (up and down) the conical notch 27 and the straight notch 28. A long sliding hole 30 is provided at the top of the mechanical claw frame 29, and a sliding gap 31 is provided on the side of the mechanical claw frame 29 close to the side of the sliding bearing box 15. The mechanical claw frame 29 is fixedly connected to a mounting plate 41 on the side of the sliding bearing box 15 and located above the sliding gap 31. The telescopic end of the hydraulic telescopic part 45 is fixedly connected to the mechanical claw frame 29, that is, the hydraulic telescopic part 45 controls the up and down movement of the mechanical claw frame 29.

[0067] One end of the first telescopic rod 32 extends into the inner side of the mechanical claw frame 29, and the first telescopic rod 32 is slidably connected to the mechanical claw frame 29, and the side of the first telescopic rod 32 and located inside the long sliding hole 30 is fixedly connected with the second limiting slider 35, one end of the second telescopic rod 33 extends into the inner side of the mechanical claw frame 29, and the second telescopic rod 33 is slidably connected to the mechanical claw frame 29, and the side of the second telescopic rod 33 and located inside the long sliding hole 30 is fixedly connected with the first limiting slider 34. The first telescopic rod 32 and the second telescopic rod 33 are respectively located at the two ends of the mechanical claw frame 29, and a spring 36 is provided on the inner side of the mechanical claw frame 29 and between the first telescopic rod 32 and the second telescopic rod 33.

[0068] Under the action of the spring 36, the first telescopic rod 32 and the second telescopic rod 33 have a tendency to move outwards, such as Figure 9 When the hydraulic telescopic member 45 controls the mechanical claw frame 29 to move downward, the first telescopic rod 32 and the second telescopic rod 33 are squeezed by the inclined surface and will retract toward the inner side of the mechanical claw frame 29. That is, the first telescopic rod 32 and the second telescopic rod 33 approach each other to squeeze the spring 36. When they pass the bottom end of the conical notch 27 and enter the straight notch 28, the first telescopic rod 32 and the second telescopic rod 33 will automatically extend under the action of the spring 36 and can clamp the counterweight 17. At this time, when the hydraulic telescopic member 45 controls the mechanical claw frame 29 to move upward, it can drive the counterweight 17 to move upward together. Under such operation, it can also drive the counterweight 17 of the next layer, and continuously increase the number of counterweights 17 (counterweights 17 in the load-applying state) until the predetermined load is finally reached.

[0069] The above process does not require the use of large lifting equipment. The purpose of increasing the load can be achieved by using the device's own hydraulic telescopic parts 45. It is worth noting that the number of counterweights 17 (counterweights 17 in the load-applying state) in the sliding bearing boxes 15 located at both ends of the elongated bearing platform 4 needs to be increased simultaneously.

[0070] The first push block 37 and the second push block 38 are both located inside the long sliding hole 30, and the first push block 37 and the second push block 38 are both slidably connected to the long sliding hole 30, and the first push block 37 and the second push block 38 are located outside the position of the second limit slider 35 and the first limit slider 34; a tooth portion is provided below the upper rack 39, and one end of the upper rack 39 is fixedly connected to the first push block 37 through the first connecting frame, and the first connecting frame is located inside the sliding gap 31, and a tooth portion is provided above the lower rack 40, and one end of the lower rack 40 is connected to the second push block 37 through the second connecting frame. The block 38 is fixedly connected, and the second connecting frame is located inside the sliding gap 31; one end of the gear shaft 42 is rotatably connected to the mounting plate 41, and the side of the gear shaft 42 is fixedly connected to the driving gear 43, and the driving gear 43 is located between the upper rack 39 and the lower rack 40, and is engaged with the upper rack 39 and the lower rack 40 at the same time; the sliding block 44 is slidably connected to the second vertical sliding hole 46, the sliding block 44 is fixedly connected to the mounting plate 41, the gear shaft 42 passes through the sliding block 44, and the end of the gear shaft 42 away from the mounting plate 41 is fixedly connected to the handwheel disk 47.

[0071] The sliding block 44 is slidably connected to the second vertical sliding hole 46, which can ensure that the mechanical claw frame 29 is in a stable state during the up and down movement, reducing the risk of accidents caused by the counterweight block 17 sliding off.

[0072] When the gear 43 is in the upper and lower positions, the upper and lower gears 39 and 40 are in the lower position, and the gear 43 is engaged with the gear 43 and the gear 43 is engaged with the gear 43. When the gear 43 is in the upper and lower positions, the upper and lower gears 39 and 40 are in the lower position, and the gear 43 is engaged with the gear 43 and the gear 43 is engaged with the gear 43 and the gear 43 is engaged with the gear 43 and the gear 43 is engaged with the gear 43 and the gear 43 is engaged with the gear 43 and the gear 43. When the gear 43 is in the upper and lower positions, the upper and lower gears 39 and 40 are in the lower position, and the gear 43 is engaged with the gear 43 and the gear 43 is engaged with the gear 43 and the gear 43 is engaged with the gear 43 and the gear 43 is engaged with the gear 43 and the gear 43

[0073] In one embodiment, a conical notch 27 and a straight notch 28 are provided on two symmetrical sides of the counterweight 17, two hydraulic telescopic parts 45 and two mechanical claw assemblies are provided, and the main parts of the two hydraulic telescopic parts 45 are fixed by a connecting frame.

[0074] Two mechanical claw assemblies and two hydraulic telescopic parts 45 are used to drive the counterweight 17 to move up and down, and the movement is more stable. It is worth noting that the two hydraulic telescopic parts 45 should be controlled in a synchronous lifting manner.

[0075] In one embodiment, a reinforcement beam 7 is fixedly connected to the top of the beam frame 6, and the sliding push block 13 is slidably connected to the reinforcement beam 7. The reinforcement beam 7 is provided to increase the structural strength of the beam frame 6.

[0076] In one embodiment, a first vertical sliding hole 18 is provided on a side of the sliding bearing box 15 close to the foundation pile 1, and a screw 19 is fixedly connected to the side of the counterweight block 17. One end of the screw 19 passes through the first vertical sliding hole 18 and extends to the outside of the sliding bearing box 15. A limiting plate 20 is provided on the screw 19 and located on the outside of the sliding bearing box 15. A through hole 21 corresponding to the screw 19 is provided on the side of the limiting plate 20. A limiting sleeve 22 is threadedly connected to the end of the screw 19 and located on the outside of the limiting plate 20. A roller 23 is provided on the side of the limiting plate 20.

[0077] The limiting plate 20 and the limiting sleeve 22 are generally connected when the counterweight 17 is installed in the sliding bearing box 15. The limiting plate 20 slides along the outer wall of the sliding bearing box 15 by means of the roller 23, and the screw 19 slides inside the first vertical sliding hole 18. It can ensure the stability of the counterweight 17 sliding up and down, and can avoid the problem of the counterweight 17 sliding off the sliding bearing box 15 when it is slightly tilted.

[0078] The side of the sliding bearing box 15 away from the foundation pile 1 is set as an opening, and a bayonet 24 is provided on the side of the opening. A limiting rod 25 is provided inside the bayonet 24. The number of the limiting rods 25 and the bayonet 24 is the same as the number of the counterweight blocks 17.

[0079] The purpose of providing the limiting rod 25 and the bayonet 24 is also to prevent the counterweight 17 from sliding off the sliding carrying box 15 when it tilts slightly.

[0080] A top circular hole 16 is formed on the top of the sliding bearing box 15 , a vertical hole 10 is formed on the inner bottom of the mounting groove 5 , and the counterweight beam connecting rod 11 is located inside the top circular hole 16 and the vertical hole 10 .

[0081] In one embodiment, a step groove 48 is provided at the top and bottom ends of the counterweight block 17, and a step plate 49 is fixedly connected to the inner side of the step groove 48. A round hole is provided at the end of the step plate 49 close to the end counterweight block 17, and a long hole is provided at the end of the step plate 49 away from the counterweight block 17. The top of the counterweight block 17 is fixedly connected to the top plate 26.

[0082] The upper and lower ends of the I-shaped connector 50 are long plates, and there is a column between the two long plates. The cross-section of the column is preferably a regular hexagon. The long plate is aligned with the long hole opened at the end of the step plate 49 away from the counterweight block 17 so that it can be inserted into the long hole. When the upper and lower counterweight blocks 17 are close to each other, the long plates at the upper and lower ends of the I-shaped connector 50 enter the long hole at the same time. At this time, the I-shaped connector 50 can be rotated using tools.

[0083] The design of the top plate 26 allows a certain gap to be left when two adjacent counterweights 17 are aligned, so that a tool can be inserted into the gap to rotate the I-shaped connector 50.

[0084] Example 2:

[0085] Using the pile foundation bearing capacity detection device in embodiment 1, and combining with the attached Figures 1-11 .

[0086] A pile foundation bearing capacity detection method is proposed, which includes the following installation steps:

[0087] Step 1: linearly arrange the slide rails along the distribution direction of the foundation piles 1, place the unloaded sliding bearing box 15 on the slide rails, and make the sliding bearing box 15 slide along the slide rails. Slide the sliding bearing box 15 to the use position according to the use requirements;

[0088] Step 2: Load the counterweight 17 into the sliding carrying box 15, and install the stabilization kit 2 and the elongated carrying platform 4 on top of the first foundation pile 1 to be tested. Use a forklift to load the counterweight 17. After loading, the limiting rod 25 needs to be locked in the bayonet 24 to prevent the counterweight 17 from sliding off.

[0089] Step 3: Slide the sliding bearing box 15 along the slide rail to the bottom of the end of the elongated bearing platform 4, and use pins to connect the top of the counterweight beam connecting rod 11 to the end of the beam frame 6, and then perform the foundation pile bearing capacity test.

[0090] The test steps include:

[0091] S1. Operate the handle frame 9 to rotate the cam member 8, supporting the beam frame 6 in an inclined state. At this time, one end of the beam frame 6 rises, driving the counterweight beam connecting rod 11 to move upward as a whole, so that the top counterweight block 17 is hoisted. Then, use the hydraulic telescopic member 45 to control the mechanical claw assembly to grab the counterweight blocks 17 of the second layer. After hoisting it, use the I-shaped connecting member to connect the hoisted counterweight blocks 17 of the second layer to the top counterweight block 17. Repeat this operation to connect the counterweight blocks 17 of the third layer, the fourth layer, ... the Nth layer to the counterweight block 17 above, until the predetermined load capacity is met;

[0092] S2. Use auxiliary equipment to measure the settlement of the pile top and obtain the Q-s curve of the static load test, where Q represents the load weight and s represents the depth of pile settlement;

[0093] S3. After the first pile test is completed, the user manipulates the handle frame 9 to rotate the cam member 8, causing all the counterweights to fall simultaneously. The user then controls the bidirectional telescopic rod 14 to extend, pushing the sliding push block 13 to slide outward. The sliding push block 13 restrains the top of the beam 6 from above. At this time, the beam 6 rotates from the angle toward the horizontal direction, and at the same time drives the elongated supporting platform 4 to move upward and disengage from the stabilizing kit 2.

[0094] S4. The construction personnel remove the stabilization kit 2 from the top of the first foundation pile 1 to be tested, and install it on the top of the second foundation pile 1 to be tested. The construction personnel use the track to move the sliding bearing box 15 and the elongated bearing platform 4 again to align them with the stabilization kit 2 on the top of the second foundation pile 1 to be tested. The bidirectional telescopic rod 14 is controlled to retract so that the elongated bearing platform 4 falls onto the stabilization kit 2 on the top of the second foundation pile 1 to be tested, and the bearing capacity test of the second foundation pile 1 to be tested is carried out. The operation is repeated to carry out the bearing capacity test on all the foundation piles 1 to be tested.

[0095] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A pile foundation bearing capacity detection device, comprising a pile foundation (1), a stabilizing kit (2), a slide rail, and an elongated bearing platform (4), wherein the stabilizing kit (2) is fixedly sleeved on the top of the pile foundation (1), and the slide rail is linearly arranged along the distribution direction of the pile foundation (1), characterized in that: The bottom of the elongated supporting platform (4) is slidably connected to the top of the stabilizing kit (2), and the slidable direction of the elongated supporting platform (4) and the stabilizing kit (2) is perpendicular to the length direction of the elongated supporting platform (4), and further comprises: A beam frame (6), wherein mounting grooves (5) are provided on the top and near both ends of the elongated supporting platform (4), two beam frames (6) are provided, which are respectively installed inside the two mounting grooves (5), and one end of the beam frame (6) is movably connected to the inner bottom of the mounting groove (5) near the middle position of the elongated supporting platform (4); A cam member (8), the cam member (8) being located inside the mounting groove (5) and below the beam frame (6), the cam member (8) having shaft members at both ends, the shaft member being movably connected to the elongated supporting platform (4) via a shaft seat, and the end of the shaft member being fixedly connected to a handle frame (9); A fixed frame (12), wherein the bottom of the fixed frame (12) is fixedly connected to the top of the elongated supporting platform (4), and the inner hole of the fixed frame (12) is distributed along the length direction of the elongated supporting platform (4), and the inner side of the fixed frame (12) and near both ends are slidably connected to sliding push blocks (13), and a bidirectional telescopic rod (14) is fixedly connected between the two sliding push blocks (13); A sliding bearing box (15), wherein the bottom of the sliding bearing box (15) is provided with a slider structure cooperating with a slide rail, and a plurality of counterweight blocks (17) are provided inside the sliding bearing box (15), wherein the plurality of counterweight blocks (17) are distributed in a vertical direction, and two upper and lower adjacent counterweight blocks (17) are fixed by an I-shaped connecting piece (50), and the top of the uppermost counterweight block (17) is fixedly connected to a counterweight beam connecting rod (11), and the top end of the counterweight beam connecting rod (11) is movably connected to an end of the beam frame (6) away from the middle position of the elongated bearing platform (4); a mechanical claw assembly, the mechanical claw assembly being slidably disposed on the inner side of the sliding bearing box (15), and the mechanical claw assembly being capable of grasping a counterweight (17); A hydraulic telescopic component (45), wherein the main body of the hydraulic telescopic component (45) is fixedly connected to the top of the sliding bearing box (15), and the telescopic end of the hydraulic telescopic component (45) is fixedly connected to the mechanical claw assembly.

2. The pile foundation bearing capacity detection device according to claim 1, characterized in that: The side of the counterweight block (17) is provided with a conical notch (27) and a straight notch (28). The conical notch (27) is a structure with a larger upper portion and a smaller lower portion. The top of the conical notch (27) passes through the top of the counterweight block (17). The bottom of the conical notch (27) is connected to the top of the straight notch (28). The bottom of the straight notch (28) passes through the bottom of the counterweight block (17). The side of the sliding bearing box (15) is provided with a second vertical sliding hole (46). The mechanical claw assembly includes: A mechanical claw frame (29), wherein the length of the mechanical claw frame (29) is less than the length of the bottom end of the conical notch (27), a long sliding hole (30) is provided on the top of the mechanical claw frame (29), a sliding gap (31) is provided on the side of the mechanical claw frame (29) close to the side of the sliding bearing box (15), a mounting plate (41) is fixedly connected to the side of the mechanical claw frame (29) close to the side of the sliding bearing box (15) and located above the sliding gap (31), and the telescopic end of the hydraulic telescopic member (45) is fixedly connected to the mechanical claw frame (29); A first telescopic rod (32) and a second telescopic rod (33), one end of the first telescopic rod (32) extends into the inner side of the mechanical claw frame (29), and the first telescopic rod (32) is slidably connected to the mechanical claw frame (29), a second limiting slider (35) is fixedly connected to the side of the first telescopic rod (32) and located inside the long sliding hole (30), one end of the second telescopic rod (33) extends into the inner side of the mechanical claw frame (29), and the second telescopic rod (33) is slidably connected to the mechanical claw frame (29), a first limiting slider (34) is fixedly connected to the side of the second telescopic rod (33) and located inside the long sliding hole (30), the first telescopic rod (32) and the second telescopic rod (33) are respectively located at two ends of the mechanical claw frame (29), and a spring (36) is provided on the inner side of the mechanical claw frame (29) and located between the first telescopic rod (32) and the second telescopic rod (33); A first push block (37) and a second push block (38), wherein the first push block (37) and the second push block (38) are both located inside the long slide hole (30), the first push block (37) and the second push block (38) are both slidably connected to the long slide hole (30), and the first push block (37) and the second push block (38) are located outside the positions of the second limiting slide block (35) and the first limiting slide block (34); An upper rack (39) and a lower rack (40), wherein a tooth portion is provided below the upper rack (39), one end of the upper rack (39) is fixedly connected to the first push block (37) via a first connecting frame, the first connecting frame is located inside the sliding gap (31), and a tooth portion is provided above the lower rack (40), one end of the lower rack (40) is fixedly connected to the second push block (38) via a second connecting frame, the second connecting frame is located inside the sliding gap (31); A gear shaft (42), one end of the gear shaft (42) is rotatably connected to the mounting plate (41), a side surface of the gear shaft (42) is fixedly connected to a driving gear (43), the driving gear (43) is located between the upper rack (39) and the lower rack (40), and is simultaneously meshed with the upper rack (39) and the lower rack (40); A sliding block (44) is slidably connected to the second vertical sliding hole (46), the sliding block (44) is fixedly connected to the mounting plate (41), the gear shaft (42) passes through the sliding block (44), and one end of the gear shaft (42) away from the mounting plate (41) is fixedly connected to a hand wheel disc (47).

3. A pile foundation bearing capacity detection device according to claim 2, characterized in that: The counterweight block (17) is provided with a conical notch (27) and a straight notch (28) on two symmetrical side surfaces. Two hydraulic telescopic parts (45) and two mechanical claw assemblies are provided. The main bodies of the two hydraulic telescopic parts (45) are fixed by a connecting frame.

4. A pile foundation bearing capacity detection device according to claim 3, characterized in that: The top of the beam frame (6) is fixedly connected to a reinforcement beam (7), and the sliding push block (13) is slidably connected to the reinforcement beam (7).

5. A pile foundation bearing capacity detection device according to claim 4, characterized in that: The bottom end of the stabilizing kit (2) is open, a reinforcing steel pad is provided on the inner top of the stabilizing kit (2), and a fastening nail (3) is threadedly connected to the side of the stabilizing kit (2).

6. A pile foundation bearing capacity detection device according to claim 5, characterized in that: A first vertical sliding hole (18) is provided on a side of the sliding bearing box (15) close to the foundation pile (1), and a screw rod (19) is fixedly connected to the side of the counterweight block (17), one end of the screw rod (19) passes through the first vertical sliding hole (18) and extends to the outside of the sliding bearing box (15), and a limiting plate (20) is provided on the screw rod (19) and is located on the outside of the sliding bearing box (15), and a through hole (21) corresponding to the screw rod (19) is provided on the side of the limiting plate (20), and a limiting sleeve (22) is threadedly connected to the end of the screw rod (19) and is located on the outside of the limiting plate (20), and a roller (23) is provided on the side of the limiting plate (20).

7. A pile foundation bearing capacity detection device according to claim 6, characterized in that: A side of the sliding bearing box (15) away from the foundation pile (1) is set as an opening, and a bayonet (24) is provided on the side of the opening. A limiting rod (25) is provided inside the bayonet (24), and the number of the limiting rods (25) and the bayonet (24) is the same as the number of the counterweight blocks (17).

8. A pile foundation bearing capacity detection device according to claim 7, characterized in that: A top circular hole (16) is provided on the top of the sliding bearing box (15), a vertical hole (10) is provided on the inner bottom of the mounting groove (5), and the counterweight beam connecting rod (11) is located inside the top circular hole (16) and the vertical hole (10).

9. A pile foundation bearing capacity detection device according to claim 8, characterized in that: The top and bottom ends of the counterweight block (17) are both provided with a step groove (48), the inner side of the step groove (48) is fixedly connected to a step plate (49), the end of the step plate (49) close to the end counterweight block (17) is provided with a circular hole, the end of the step plate (49) away from the counterweight block (17) is provided with a long hole, and the top end of the counterweight block (17) is fixedly connected to a top plate (26).

10. A pile foundation bearing capacity detection method, characterized in that: The detection method uses the pile foundation bearing capacity detection device described in claim 9 to perform pile foundation bearing capacity detection, specifically comprising the following steps: Step 1: linearly arrange the slide rails along the distribution direction of the foundation piles, place the unloaded sliding bearing box on the slide rails, and allow the sliding bearing box and the slide rails to slide; Step 2: Load the counterweight into the sliding bearing box, and install the stabilization kit and the elongated bearing platform on the top of the first foundation pile to be tested; Step 3: Slide the sliding bearing box along the slide rail to the bottom of the end of the long bearing platform, and use pins to connect the top of the counterweight beam connecting rod to the end of the beam frame, and then perform the pile bearing capacity test. The test process is as follows: S1. Manipulate the handle frame to rotate the cam member, supporting the beam in an inclined state. At this time, one end of the beam frame rises, driving the counterweight beam connecting rod to move upward as a whole, so that the top counterweight block is hoisted. Then, use the hydraulic telescopic member to control the mechanical claw assembly to grab the counterweight block on the second layer. After lifting it, use the I-shaped connecting piece to connect the hoisted counterweight block on the second layer to the top counterweight block. Repeat this operation to connect the counterweight blocks on the third, fourth, ... Nth layers to the counterweight block above, until the predetermined load capacity is met; S2. Use auxiliary equipment to measure the settlement of the pile top and obtain the Q-s curve of the static load test, where Q represents the load weight and s represents the depth of pile settlement; S3. After the first pile test is completed, the user manipulates the handle frame to rotate the cam, causing all the counterweights to fall simultaneously. The user then controls the bidirectional telescopic rod to extend, pushing the sliding block outward. The sliding block restrains the top of the beam from above, causing the beam to rotate from the angle toward the horizontal direction, while simultaneously driving the elongated bearing platform to move upward and disengage from the stabilization kit. S4. The construction personnel remove the stabilization kit from the top of the first pile to be tested, and install it on the top of the second pile to be tested. The construction personnel use the track to move the sliding bearing box and the long bearing platform again to align them with the stabilization kit on the top of the second pile to be tested. The two-way telescopic rod is controlled to retract so that the long bearing platform falls onto the stabilization kit on the top of the second pile to be tested, and the bearing capacity test of the second pile to be tested is carried out. This operation is repeated to carry out bearing capacity tests on all the piles to be tested.

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