A pre-buried fixing device suitable for large-volume water-containing soil box pile body model test

Abstract

This invention relates to the field of geotechnical simulation devices, and particularly to a pre-embedded fixing device suitable for large-volume water-bearing soil box pile model tests. The device includes a main load-bearing beam with an adjustment mechanism arranged along its length on the lower surface; a pile clamping part passing through the middle of the adjustment mechanism; and edge fixing parts located on both sides of the pile clamping part and connected to the adjustment mechanism. A pair of edge fixing parts can move in opposite directions along the length of the main load-bearing beam. Each edge fixing part includes a clamping connecting seat, with soil box edge fixing components spaced apart along the length of the main load-bearing beam. A pair of soil box edge fixing components clamp the inner and outer sides of the soil box wall. This invention, through the cooperation of the main load-bearing beam, the adjustment mechanism, and the edge fixing parts, enables the device to span over a large-volume water-bearing soil box with a relatively short longitudinal structure, providing stable clamping to the edges of the soil box.

Description

Technical Field

[0001] This invention relates to the field of geotechnical simulation device technology, and in particular to a pre-embedded fixing device suitable for large-volume water-bearing soil box pile model tests. Background Technology

[0002] In large-volume water-bearing soil box model pile tests, the model piles need to maintain pre-embedded stability and verticality. Existing devices employ two main types: one uses long guide members inserted deep into the soil box, occupying a large longitudinal space and interfering with backfilling, water injection, and saturation; the other uses edge clamping, but this method is poorly adaptable to different box widths, edge shapes, and slippery environments, easily leading to unstable clamping and inconvenient adjustment. Furthermore, the clamping components are mostly of fixed dimensions, making it difficult to adapt to piles of different diameters, resulting in insufficient versatility. Therefore, there is an urgent need for a pre-embedded fixing device that can be fixed to the edge of the soil box over a short span and stably clamp model piles of various specifications. Summary of the Invention

[0003] The purpose of this invention is to provide a pre-embedded fixing device suitable for large-volume water-bearing soil box pile model tests, addressing the shortcomings of the aforementioned background technology.

[0004] To achieve the above objectives, the present invention provides a pre-embedded fixing device suitable for large-volume water-bearing soil box pile model tests, comprising: The main load-bearing crossbeam has an adjustment mechanism provided on its lower surface along its length. A pile clamping part, which passes through the middle of the adjusting mechanism; An edge fixing part is provided on both sides of the pile clamping part and connected to the adjustment mechanism. A pair of edge fixing parts can move in opposite directions along the length of the main bearing beam. The edge fixing part includes a clamp connecting seat. The clamp connecting seat is provided with soil box edge fixing components at intervals along the length of the main bearing beam. A pair of soil box edge fixing components are clamped on the inner and outer sides of the soil box wall.

[0005] Preferably, the adjusting mechanism includes limiting blocks, which are disposed at both ends of the lower surface of the main load-bearing crossbeam. A pair of limiting blocks are provided with positive and negative lead screws, which are rotatably connected to the limiting blocks and the positive and negative lead screws. The ends of the positive and negative lead screws are provided with adjusting handwheels, and the middle of the positive and negative lead screws is not provided with threads.

[0006] Preferably, a guide slide rod is also provided between the pair of limiting blocks. The guide slide rod is arranged parallel to the positive and negative lead screws, and the end of the guide rod is fixedly connected to the limiting block.

[0007] Preferably, the pile clamping part includes a central mounting base, the upper part of which is provided with a through screw hole and a guide rod hole, the through screw hole and the guide rod hole are arranged in parallel, the lower surface of the central mounting base is connected to a support column, the four support columns are arranged in a rectangle, and multiple sets of clamping components are staggered on the four support columns.

[0008] Preferably, the clamping assembly includes a transverse guide rod, a pair of transverse guide rods are arranged in parallel, and a movable clamping seat and a side support plate are sequentially passed through the transverse guide rod from the middle to both sides. An adjusting screw is passed through the middle of the side support plate. One end of the adjusting screw is connected to the movable clamping seat, and the other end is provided with an adjusting part. An arc-shaped clamping block is provided at the end of the movable clamping seat that connects to the model pile. A vertical connecting hole perpendicular to the transverse guide rod is provided at the end of the side support plate. The side support plate is passed through the vertical connecting hole onto two adjacent support columns.

[0009] Preferably, a high-friction pad is provided on the side where the arc-shaped clamping block connects to the model pile.

[0010] Preferably, the guide rod through hole and the guide slide rod are interference fit.

[0011] Preferably, the upper part of the clamp connecting seat is provided with a threaded hole and a slide bar hole, and the threaded hole and the slide bar hole are arranged in parallel.

[0012] Preferably, the soil box edge fixing assembly includes an outer support frame, one end of which is connected to one side of the lower part of the clamp connecting seat, and the other end is hinged to a support roller. The support roller is also provided with an arc-shaped adaptive clamping arm, one end of which is hinged to the support roller, and the other end is provided with an anti-slip roller. A pair of adaptive clamping arms are symmetrically arranged vertically, and the other ends of the pair of adaptive clamping arms are connected to each other through an elastic element.

[0013] Preferably, the end of the elastic element is connected to the adaptive clamping arm via a connecting pin. When the elastic element is in a compressed state, the distance between the anti-slip rollers corresponding to the edge fixing components of adjacent soil boxes on the same clamping connecting seat is less than the thickness of the soil box wall.

[0014] The above-described solution of the present invention has the following beneficial effects: This invention enables the device to be installed above a large-volume water-bearing soil box with a shorter longitudinal structure through the cooperation of the main load-bearing crossbeam, the adjustment mechanism and the edge fixing part, forming a stable clamp on the edge of the soil box; the pile clamping part clamps and fixes the model pile in the middle of the soil box, reducing the risk of slippage of the model pile during the filling, water injection and saturation process.

[0015] Other beneficial effects of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the pile clamping part in this invention; Figure 3 This is a front view of the pile clamping part in this invention; Figure 4 This is a partial structural diagram of the pile clamping part in the present invention; Figure 5 This is a schematic diagram of the overall structure of the edge fixing part in this invention; Figure 6 This is a schematic diagram of the structure of the soil box edge fixing component in this invention.

[0017] [Explanation of Labels in the Attached Image] 1. Circular level; 2. Main load-bearing crossbeam; 3. Adjusting handwheel; 4. Positive and negative lead screws; 5. Guide slide rod; 6. Clamp connecting seat; 7. Central mounting seat; 8. Adjusting screw; 9. Lead screw through hole; 10. Guide rod through hole; 11. Support column; 12. Transverse guide rod; 13. Moving clamping seat; 14. Arc-shaped clamping block; 15. Side support plate; 16. Fastening bolt; 17. Outer support frame; 18. Anti-slip roller; 19. Self-adaptive clamping arm; 20. Elastic element; 21. Threaded hole; 22. Connecting pin; 23. Support roller; 24. High friction pad. Detailed Implementation

[0018] To make the technical problems, solutions, and advantages of this invention clearer, a detailed description will be provided below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a locking connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] like Figure 1 As shown, an embodiment of the present invention provides a pre-embedded fixing device suitable for large-volume water-bearing soil box pile model tests, including a main bearing beam 2. An adjustment mechanism is provided on the lower surface of the main bearing beam 2. The adjustment mechanism extends along the length direction of the main bearing beam 2. A pile clamping part for clamping and fixing the model pile is provided in the middle. Edge fixing parts for connecting with the soil box wall are provided at both ends of the adjustment mechanism. The edge fixing parts can move closer to or further away from the pile clamping part to adapt to soil boxes of different volumes and ensure that the model pile is far away from the boundary to avoid boundary effects.

[0022] In this application, the main load-bearing beam 2 is made of rigid material, and its length is greater than the maximum width of the large-volume water-bearing soil box, so as to accommodate soil boxes of different specifications. Figure 1 As shown, a circular level 1 is installed at the center of the upper surface of the main load-bearing beam 2. During the installation of the device, the device is leveled by observing the circular level 1 to prevent the model pile from tilting and being buried in the soil box.

[0023] In this application, the adjusting mechanism includes limiting blocks, which are disposed at both ends of the lower surface of the main load-bearing crossbeam 2. A pair of limiting blocks are fitted with positive and negative lead screws 4, and the limiting blocks are rotatably connected to the positive and negative lead screws 4. Specifically, as shown... Figure 1 As shown, limiting blocks are spaced apart along the length of the main load-bearing crossbeam 2. The upper surface of the limiting blocks is fixed to the main load-bearing crossbeam 2, and each limiting block has a through-rotation hole extending along the length of the main load-bearing crossbeam 2. Positive and negative threaded rods 4 pass through the rotation holes of a pair of limiting blocks and are rotatably connected to the rotation holes via bearings, etc. The middle section of the positive and negative threaded rods 4 is an unthreaded connecting section, and both ends of the positive and negative threaded rods 4 are respectively provided with positive and negative threads. The ends of both ends pass through the rotation holes and are connected to adjusting handwheels 3. Rotating the adjusting handwheels 3 drives the positive and negative threaded rods 4 to rotate, and the edge fixing parts at both ends of the positive and negative threaded rods 4 can simultaneously move closer to or further away from the pile clamping part.

[0024] Furthermore, the adjustment mechanism also includes a guide slide rod 5, which is disposed between a pair of limiting blocks. Its end is fixedly connected to the limiting blocks. The guide slide rod 5 is arranged parallel to the positive and negative screw rods 4, and plays a guiding and limiting role for the pile clamping part and the edge fixing part, preventing them from overturning during the rotation of the positive and negative screw rods 4.

[0025] In this application, the pile clamping part includes a central mounting base 7. The upper part of the central mounting base 7 is provided with a through-hole 9 for a threaded rod and a through-hole 10 for a guide rod. The threaded rod through-hole 9 and the guide rod through-hole 10 are arranged in parallel. Specifically, as shown... Figure 2 The threaded rod through hole 9 is used for the connecting part in the middle of the positive and negative threaded rods 4 to pass through, and the guide rod through hole 10 is used for the guide slide rod 5 to pass through, so that the middle mounting seat 7 and the adjustment mechanism on the main bearing beam 2 are integrally connected and the relative positional relationship between the pile clamping part and the edge fixing part is stable. Furthermore, the guide rod through hole 10 and the guide slide rod 5 are interference fit, the inner diameter of the threaded rod through hole 9 is not less than the maximum outer diameter of the positive and negative threaded rods 4, and the threaded rod through hole 9 is rotatably connected to the unthreaded connecting section in the middle of the positive and negative threaded rods 4, so that the positive and negative threaded rods 4 can rotate relative to the middle mounting seat 7, ensuring that the position of the middle mounting seat 7 remains unchanged during the rotation of the positive and negative threaded rods 4, soil filling of the soil box, water injection and other processes.

[0026] In this application, the lower surface of the central mounting base 7 is connected to a support column 11. Specifically, four support columns 11 are arranged in a rectangle to connect clamping components. The center of the rectangle is coaxial with the center of the central mounting base 7. Multiple clamping components are staggered along the length of the support columns 11 to form multi-angle clamping of the model pile, ensuring the stability and verticality of the model pile.

[0027] In this application, the clamping assembly includes a pair of transverse guide rods 12 arranged in parallel. A movable clamping seat 13 and a side support plate 15 are sequentially inserted through the transverse guide rods 12 from the middle to both sides. An adjusting screw 8 is inserted through the middle of the side support plate 15. One end of the adjusting screw 8 is connected to the movable clamping seat 13, and the other end is provided with an adjusting part. An arc-shaped clamping block 14 is provided at the connection end of the movable clamping seat 13 and the model pile. A vertical connecting hole perpendicular to the transverse guide rods 12 is provided at the end of the side support plate 15. The side support plate 15 is inserted through the vertical connecting hole onto two adjacent support columns 11. Specifically, as shown... Figure 3 and Figure 4As shown, the movable clamping seat 13 has a guide rod through hole at its end, and the side support plate 15 has a guide rod fixing hole at its end. A pair of transverse guide rods 12 are arranged, with their ends passing through the guide rod through hole and fixed in the guide rod fixing hole. The movable clamping seat 13 can slide along the length of the transverse guide rod 12. The side support plate 15 has a vertical connecting hole at its end for connecting with the support column 11. The vertical connecting hole is offset from the guide rod fixing hole and is used to connect the side support plate 15 to the support column 11. The side support plate 15 is fixed to the support column 11. The middle part of the side support plate 15 also has an adjusting screw thread hole in the same direction as the guide rod fixing hole. The adjusting screw 8 is screwed into the adjusting screw thread hole. One end of the adjusting screw 8 is connected to the movable clamping seat 13 and can rotate relative to the movable clamping seat 13. The other end of the adjusting screw 8 has an adjustment part to facilitate the rotation of the adjusting screw 8. The rotation of the adjusting screw 8 causes the movable clamping seat 13 to clamp or release the model pile. The movable clamping seat 13 is connected to an arc-shaped clamping block 14 facing the model pile side. A pair of arc-shaped clamping blocks 14 work together to clamp and fix the model pile.

[0028] Furthermore, the outer arc side of the arc-shaped clamping block 14 is detachably connected to the movable clamping seat 13 via fastening bolts 16 to adapt to the pre-embedded test requirements of model piles of different specifications. A high-friction pad 24 is provided on the inner arc side of the arc-shaped clamping block 14. The high-friction pad 24 is in direct contact with the outer wall of the model pile to increase the frictional resistance between the clamping surface and the model pile, preventing longitudinal slippage of the model pile due to its own weight or soil compression during backfilling. The high-friction pad 24 can be made of rubber, polyurethane, or other flexible pads with anti-slip properties.

[0029] In some embodiments of this application, the forward and reverse lead screw 4, the guide slide 5, and the adjusting screw 8 are made of stainless steel or have an anti-rust coating on their surfaces to prevent the components from rusting due to the high humidity environment of the large-volume water-containing soil box, and to ensure the smoothness and durability of the adjusting mechanism during long-term use.

[0030] In this application, the edge fixing part includes a clamp connecting seat 6, and the clamp connecting seat 6 is provided with soil box edge fixing components at intervals along the length direction of the main load-bearing crossbeam. A pair of soil box edge fixing components are clamped on the inner and outer sides of the soil box wall. Specifically, as shown in the following example... Figure 5 As shown, the upper part of the clamp connecting seat 6 is provided with a threaded hole 21 and a slide rod hole. The threaded hole 21 and the slide rod hole are arranged in parallel. The positive and negative lead screws 4 pass through the threaded holes 21 and are screwed into the clamp connecting seat 6. The threaded holes 21 on the clamp connecting seat 6 at both ends of the positive and negative lead screws 4 respectively engage with the threads at the corresponding ends of the positive and negative lead screws 4 to realize the opposite movement of a pair of clamp connecting seats 6. The guide slide rod 5 passes through the slide rod hole and is slidably connected to the clamp connecting seat 6. A pair of soil box edge fixing components clamp the soil box wall.

[0031] In this application, the soil box edge fixing assembly includes an outer support frame 17. One end of the outer support frame 17 is connected to one side of the lower part of the clamp connecting seat 6, and the other end is hinged to a support roller 23. An arc-shaped adaptive clamping arm 19 is also provided on the support roller 23. One end of the adaptive clamping arm 19 is hinged to the support roller 23, and the other end is provided with an anti-slip roller 18. A pair of adaptive clamping arms 19 are symmetrically arranged vertically, and the other ends of the pair of adaptive clamping arms 19 are connected to each other through an elastic element 20. Specifically, as shown... Figure 6 As shown, the outer support frame 17 has an arc-shaped structure, with its inner arc side facing the adjacent outer support frame 17. One end of the outer support frame 17 is connected to the lower side of the clamp connecting seat 6, and the other end of the outer support frame 17 is hinged to the end of the support roller 23. The end of the support roller 23 is also hinged to a pair of adaptive clamping arms 19, which are symmetrically arranged vertically. The adaptive clamping arms 19 can rotate with the support roller 23 as the rotation center. One end of the adaptive clamping arm 19 is hinged to the support roller 23, and the other end is hinged to an anti-slip roller 18. The anti-slip roller 18 forms a pressing fit with the soil box wall, and the support roller 23 forms a supporting fit with the side or corner of the soil box wall. The other ends of the adaptive clamping arms 19 are connected to each other through elastic elements 20. The soil box edge fixing component can improve the fixing stability of the device at the edge of the soil box by utilizing the pull-back effect of the elastic element 20 and the self-weight of the device. On the other hand, since the anti-slip roller 18 has rolling contact with the edge of the soil box, it is convenient for the device to move synchronously with the clamp connecting seat 6 during the lateral adjustment process.

[0032] Furthermore, after the device is connected to and leveled with the soil box, if there is a gap between the bottom of the middle mounting base 7 and the top of the soil box wall, a shim can be placed in the gap to ensure that the device remains at the same height during use and to prevent it from falling.

[0033] This device is stably hung on the soil box wall by the edge fixing component. The structure extending longitudinally into the soil box is relatively short and occupies little space in the longitudinal direction. It will not interfere with the filling, water injection and saturation process in a water-containing soil box environment.

[0034] In this application, the elastic element 20 is a reset spring. The end of the reset spring is connected to both sides of the other end of the adaptive clamping arm 19 through the connecting pin 22. When the reset spring is in a compressed state, the adaptive clamping arm 19 maintains a closing tendency. The distance between the anti-slip rollers 18 corresponding to the adjacent soil box edge fixing components is less than the thickness of the soil box wall. When the soil box wall enters the soil box edge fixing component, the soil box wall pushes the adaptive clamping arm 19 to open. The reset spring generates a pull-back effect on the adaptive clamping arm 19 so that the anti-slip rollers 18 press against the edge of the soil box, firmly clamping the device on the soil box wall.

[0035] The installation and use process of this invention is as follows: First, adjust the handwheel 3 according to the width of the soil box, so that the two clamp connecting seats 6 drive the soil box edge fixing components at both ends to move to an appropriate distance; then, hang the soil box edge fixing components at both ends on the two sides of the soil box respectively, the adaptive clamping arm 19 opens under the action of the soil box edge, and the anti-slip roller 18 presses the soil box edge under the pull action of the elastic element 20; then, level the main bearing beam 2 using the circular level 1; finally, place the model pile between the two arc-shaped clamping blocks 14, screw in the adjusting screw 8, and push the moving clamping seat 13 to slide inward along the transverse guide rod 12, so that the two arc-shaped clamping blocks 14 clamp and position the model pile. When it is necessary to change the specifications of the model pile, simply remove the fastening bolt 16 and replace the arc-shaped clamping block 14 of the corresponding size. The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A pre-embedded fixing device suitable for large-volume water-bearing soil box pile model tests, characterized in that, include: The main load-bearing crossbeam has an adjustment mechanism provided on its lower surface along its length. A pile clamping part, which passes through the middle of the adjusting mechanism; An edge fixing part is provided on both sides of the pile clamping part and connected to the adjustment mechanism. A pair of edge fixing parts can move in opposite directions along the length of the main bearing beam. The edge fixing part includes a clamp connecting seat. The clamp connecting seat is provided with soil box edge fixing components at intervals along the length of the main bearing beam. A pair of soil box edge fixing components are clamped on the inner and outer sides of the soil box wall.

2. The pre-embedded fixing device for large-volume water-bearing soil box pile model tests according to claim 1, characterized in that, The adjustment mechanism includes a limiting block, which is disposed at both ends of the lower surface of the main load-bearing crossbeam. A pair of limiting blocks are provided with positive and negative lead screws, which are rotatably connected to the limiting blocks and the positive and negative lead screws. An adjustment handwheel is provided at the end of the positive and negative lead screws, and no thread is provided in the middle of the positive and negative lead screws.

3. The pre-embedded fixing device for large-volume water-bearing soil box pile model tests according to claim 2, characterized in that, A guide slide rod is also provided between the pair of limiting blocks. The guide slide rod is arranged parallel to the positive and negative lead screws, and the end of the guide rod is fixedly connected to the limiting block.

4. The pre-embedded fixing device for large-volume water-bearing soil box pile model tests according to claim 1, characterized in that, The pile clamping part includes a central mounting base. The upper part of the central mounting base is provided with a through screw hole and a guide rod hole. The screw hole and the guide rod hole are arranged in parallel. The lower surface of the central mounting base is connected to a support column. The four support columns are arranged in a rectangle. Multiple sets of clamping components are staggered on the four support columns.

5. The pre-embedded fixing device for large-volume water-bearing soil box pile model tests according to claim 4, characterized in that, The clamping assembly includes a pair of horizontal guide rods arranged in parallel. A movable clamping seat and a side support plate are sequentially inserted through the horizontal guide rods from the middle to both sides. An adjusting screw is inserted through the middle of the side support plate. One end of the adjusting screw is connected to the movable clamping seat, and the other end is provided with an adjusting part. An arc-shaped clamping block is provided at the end of the movable clamping seat that connects to the model pile. A vertical connecting hole perpendicular to the horizontal guide rod is provided at the end of the side support plate. The side support plate is inserted through the vertical connecting hole onto two adjacent support columns.

6. The pre-embedded fixing device for large-volume water-bearing soil box pile model tests according to claim 5, characterized in that, The arc-shaped clamping block is provided with a high-friction pad on the side where it connects to the model pile.

7. The pre-embedded fixing device for large-volume water-bearing soil box pile model tests according to claim 4, characterized in that, The guide rod through hole and the guide slide rod are interference fit.

8. The pre-embedded fixing device for large-volume water-bearing soil box pile model tests according to claim 1, characterized in that, The upper part of the clamp connecting seat is provided with a threaded hole and a slide bar hole, and the threaded hole and the slide bar hole are arranged in parallel.

9. The pre-embedded fixing device for large-volume water-bearing soil box pile model tests according to claim 1, characterized in that, The soil box edge fixing assembly includes an outer support frame. One end of the outer support frame is connected to one side of the lower part of the clamp connecting seat, and the other end is hinged to a support roller. The support roller is also provided with an arc-shaped adaptive clamping arm. One end of the adaptive clamping arm is hinged to the support roller, and the other end is provided with an anti-slip roller. A pair of adaptive clamping arms are symmetrically arranged vertically, and the other ends of the pair of adaptive clamping arms are connected to each other through an elastic element.

10. The pre-embedded fixing device for model tests of large-volume water-bearing soil box piles according to claim 9, characterized in that, The end of the elastic element is connected to the adaptive clamping arm via a connecting pin. When the elastic element is in a compressed state, the distance between the anti-slip rollers corresponding to the edge fixing components of adjacent soil boxes on the same clamping connecting seat is less than the thickness of the soil box wall.

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