Simple static load test device for rotary excavating cast-in-situ bored pile

Abstract

The utility model discloses a simple rotary excavating cast-in-situ bored pile static load test device which comprises a test pile and an anchor pile, the upper surface of the anchor pile is fixedly connected with a bottom plate, the upper surface of the bottom plate is fixedly connected with two symmetrical fixing plates, the side face of each fixing plate is hinged to one end of a rotating plate, the side face of each fixing plate is hinged to one end of a hydraulic cylinder, and a sliding groove is formed in the side face of each rotating plate. A square sliding block is arranged in the sliding groove, one end of the square sliding block is fixedly connected with a limiting plate, and the side face of the limiting plate is rotationally connected with one ends of two symmetrical limiting rollers. A static load test can be carried out on the test pile through the anchor pile, early-stage preparation work is reduced, changes of the distance and the height between the test pile and the anchor pile can be adjusted through the fixing plate, the rotating plate and the hydraulic cylinder, the flexibility of the test device is improved, the positions of the limiting plate and the limiting roller are adjusted through the threaded rod, and the test efficiency is improved. According to the lever principle, the strength range of the test device on the static load test can be expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a simple rotary drilling and pouring pile static load test device. Background Art

[0002] Rotary bored piles are now widely used in engineering construction due to their high accuracy, high quality of piles after forming, low environmental pollution and high safety. The biggest advantage of rotary bored piles is their high forming efficiency, which greatly improves work efficiency and speeds up the overall progress of the project. However, most of the existing detection methods are static load tests using the anchor pile method.

[0003] According to the publication number CN209025119 U, a "simple rotary bored pile static load test device" is disclosed. This patent reduces four anchor piles to two anchor piles for load testing, which reduces the preparatory work before the test and speeds up the overall project progress. The reaction beam is fixed by welding the steel bars to each other. However, the following defects are found in actual use: the two anchor piles still bring a large workload to the preparatory work beforehand and are still limited in use. In addition, when the heights of the two anchor piles are different, or the height difference between the anchor pile and the test pile is large, the above patent needs to cut the steel bars of the corresponding height and quantity and then weld them before the reaction beam can be fixed and pressure can be applied by a jack. This undoubtedly increases the preparatory work beforehand. In addition, after the inspection is completed, the steel bars need to be cut with a cutting machine to complete the disassembly. Utility Model Content

[0004] The utility model aims to provide a simple rotary bored pile static load test device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a simple rotary bored pile static load test device, comprising a test pile and an anchor pile, wherein the upper surface of the anchor pile is fixedly connected to a bottom plate, the upper surface of the bottom plate is fixedly connected to two symmetrical fixed plates, the side surface of the fixed plate is hinged to one end of a rotating plate, the side surface of the fixed plate is hinged to one end of a hydraulic cylinder, a slide groove is provided on the side surface of the rotating plate, a square slider is provided inside the slide groove, one end of the square slider is fixedly connected to a limit plate, and the side surface of the limit plate is hinged to two One end of a symmetrical limiting roller is rotatably connected, a crossbeam is arranged on the side of the limiting plate, one end of the crossbeam is hinged to hinge plate 1, one end of hinge plate 1 is hinged to pressure plate, the other end of the crossbeam is hinged to hinge plate 2, one end of hinge plate 2 is hinged to the output end of the jack, the bottom of the jack is fixedly connected to the lifting plate, the bottom of the lifting plate is fixedly connected to the threaded column, the upper surface of the anchor pile is rotatably connected to the bottom of the sleeve, the side of the rotating plate is fixedly connected to two ear plates, and the ear plate is rotatably connected to one end of the threaded rod.

[0006] Preferably, the fixed plate is a double-layer structure, the number of the fixed plates is two, and they are symmetrically distributed with each other, the top of the fixed plate is hinged to one end of the rotating plate, the rotating plate is hinged to the output end of the hydraulic cylinder through the hinge plate, the other end of the hydraulic cylinder is hinged to the side of the fixed plate through the hinge plate, the lifting plate is located between the two fixed plates, and the lifting plate is slidably connected to the side of the fixed plate.

[0007] Preferably, the inner diameter of the slide groove is matched with the outer diameter of the square slider, and the square slider is slidably connected to the inside of the slide groove.

[0008] Preferably, the number of the square sliders is two and they are symmetrically distributed, one of the square sliders has a threaded hole on its side, and the square slider is threadedly connected to the threaded rod through the threaded hole, and the other square slider has a circular through hole on its side, and the square slider is slidably connected to the limit rod through the circular through hole, and both ends of the limit rod are fixedly connected to the ear plate.

[0009] Preferably, the crossbeam is located between two limiting rollers, the limiting roller is located between two limiting plates, both ends of the limiting roller are rotatably connected to the side surfaces of the limiting plates, and the hinged plate 1 and the hinged plate 2 are respectively hinged to both ends of the crossbeam.

[0010] Preferably, the bottom of the sleeve is rotatably connected to the base plate via a bearing, a threaded hole is provided inside the sleeve, and the sleeve is threadedly connected to the outer side of the threaded column via the threaded hole.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model can carry out static load test on the test pile by setting an anchor pile, further reducing the preparatory work before the test, and can adjust the distance and height between the test pile and the anchor pile by using the fixed plate, the rotating plate and the hydraulic cylinder, effectively enhancing the applicability of the test device, and can make the jack rise and fall by the threaded column and the sleeve to further cooperate with the adjustment of height and distance, so as to better deal with the problem that the jack cannot apply force due to the different heights of the test pile and the anchor pile, and the rotating plate cannot adapt to the distance between the test pile and the anchor pile, thereby improving the flexibility of the test device, and in addition, the position of the limit plate and the limit roller is adjusted by the threaded rod, so as to adjust the fulcrum of the beam, and according to the lever principle, the force arms on both sides of the beam can change the respective forces, so when the limit roller is moved away from the hinged plate 2, the force arm on one side of the jack is longer, so the jack can use less force to make the pressure plate apply more pressure to the test pile, thereby expanding the strength range of the test device for static load test. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a cross-sectional view of the overall structure of the utility model;

[0015] Figure 3 It is a partial structural schematic diagram of the utility model.

[0016] In the figure: 1. test pile; 2. anchor pile; 3. bottom plate; 4. fixed plate; 5. rotating plate; 6. hydraulic cylinder; 7. slideway; 8. square slider; 9. limit plate; 10. limit roller; 11. crossbeam; 12. hinged plate 1; 13. pressure plate; 14. hinged plate 2; 15. jack; 16. lifting plate; 17. threaded column; 18. sleeve; 19. ear plate; 20. threaded rod. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-3 The utility model provides a technical solution: a simple rotary drilling bored pile static load test device, including a test pile 1, an anchor pile 2, the upper surface of the anchor pile 2 is fixed to the bottom plate 3 by bolts, the upper surface of the bottom plate 3 is welded and fixed to two symmetrical fixed plates 4, the top side of the fixed plate 4 is hinged to one end of the rotating plate 5, the side of the fixed plate 4 is hinged to one end of the hydraulic cylinder 6, the other end of the hydraulic cylinder 6 is hinged to the rotating plate 5, the fixed plate 4, the rotating plate 5 and the hydraulic cylinder 6 are distributed in a triangular shape, a slide groove 7 is provided on the side of the rotating plate 5, the inside of the slide groove 7 is slidably connected to the outer side of the square slider 8, one end of the square slider 8 is welded and fixed to a limit plate 9, the number of the limit plates 9 is two, the side of the limit plate 9 is respectively rotatably connected to the two ends of two symmetrical limit rollers 10, a crossbeam 11 is arranged between the limit rollers 10, One end of the beam 11 is hinged to the hinged plate 12, one end of the hinged plate 12 is hinged to the pressure plate 13, the bottom surface of the pressure plate 13 abuts against the upper surface of the test pile 1, the other end of the beam 11 is hinged to the hinged plate 2 14, one end of the hinged plate 2 14 is hinged to the output end of the jack 15, the bottom of the jack 15 is fixedly connected to the lifting plate 16, the bottom of the lifting plate 16 is welded and fixed to the threaded column 17, the upper surface of the anchor pile 2 is rotatably connected to the bottom of the sleeve 18, the sleeve 18 is threadedly connected to the outer side of the threaded column 17 through a threaded hole, the lifting plate 16 is located between the two fixed plates 4, and the lifting plate 16 is slidably connected to the side of the fixed plate 4, the side of the rotating plate 5 is welded and fixed to two ear plates 19, the ear plate 19 is rotatably connected to one end of the threaded rod 20, and the other end of the threaded rod 20 extends to one side of the ear plate 19 and is fixedly connected to the handwheel.

[0019] In order to ensure the stability of the fixed plate 4 and the stability of the hinge at one end of the hydraulic cylinder 6, the fixed plate 4 is a double-layer structure, the number of fixed plates 4 is two, and they are symmetrically distributed. The top of the fixed plate 4 is hinged to one end of the rotating plate 5, and the rotating plate 5 is hinged to the output end of the hydraulic cylinder 6 through the hinge plate. The other end of the hydraulic cylinder 6 is hinged to the side of the fixed plate 4 through the hinge plate. In order to ensure that the threaded column 17 drives the lifting plate 16 to rise and fall more smoothly, the lifting plate 16 is located between the two fixed plates 4, and the lifting plate 16 is slidably connected to the side of the fixed plate 4. By limiting the lifting plate 16, the rotating sleeve 18 can make the threaded column 17 drive the lifting plate 16 to move up and down, so that the jack 15 can better cooperate with the adjustment of the rotating plate 5 and the crossbeam 11, and enhance the actual use effect of the test device. The inner diameter size of the slide 7 is adapted to the outer diameter size of the square slider 8, and the square slider 8 is slidably connected to the inside of the slide 7. There are two square sliders 8, which are symmetrically distributed. A threaded hole is provided on the side of one of the square sliders 8, and the square slider 8 is threadedly connected to the threaded rod 20 through the threaded hole. A circular through hole is provided on the side of the other square slider 8, and the square slider 8 is slidably connected to the limit rod through the circular through hole, and the two ends of the limit rod are fixedly connected to the ear plate 19. The crossbeam 11 is located between the two limit rollers 10, and the limit roller 10 is located between the two limit plates 9. The two ends of the limit roller 10 are rotatably connected to the side of the limit plate 9, and the hinge plate 12 and the hinge plate 2 14 are respectively hinged to the two ends of the crossbeam 11. The square slider 8 is moved by rotating the hand wheel at one end of the threaded rod 20, thereby moving the limiting roller 10. When the limiting roller 10 is away from one end of the hinged plate 2 14, the force arm on one side of the hinged plate 2 14 increases. According to the lever principle, when the output end of the jack 15 rises to the same height, the pressure of the pressure plate 13 on the test pile 1 will increase. By adjusting the fulcrum formed by the limiting roller 10, the pressure strength applied by the jack 15 to the pressure plate 13 can be adjusted, expanding the strength range of the static load test. The bottom of the sleeve 18 is rotatably connected to the bottom plate 3 through a bearing, and a threaded hole is provided inside the sleeve 18. The sleeve 18 is threadedly connected to the outer side of the threaded column 17 through the threaded hole. The threaded column 17 and the sleeve 18 are used to adjust the lifting and lowering of the jack 15, so that the jack 15 can be adjusted according to the height difference and distance between the test pile 1 and the anchor pile 2 until the bottom surface of the pressure plate 13 is fitted with the upper surface of the test pile 1, thereby performing a load test.

[0020] Working principle: When testing, the staff extends and contracts the hydraulic cylinder 6 to rotate one end of the rotating plate 5, and then rotates the sleeve 18 to make the threaded column 17 rise and fall inside the sleeve 18, thereby driving the jack 15 to rise and fall, and adjust according to the height difference and distance between the test pile 1 and the anchor pile 2 until the bottom surface of the pressure plate 13 fits the upper surface of the test pile 1. At this time, the fixed plate 4 and the rotating plate 5 are connected and fixed by the hydraulic cylinder 6. The triangular through groove formed by the hydraulic cylinder 6 makes the fixed plate 4 and the rotating plate 5 more stable. At this time, the jack 15 is driven to drive the hinged plate 2 14 to move one end of the beam 11 upward. Because the outer side of the beam 11 is located between the two limit plates 9, a fulcrum is formed, so that the hinged plate 1 on the other side of the beam 11 12 applies downward pressure to the pressure plate 13. As the output end of the jack 15 continues to rise, the pressure of the pressure plate 13 on the test pile 1 gradually increases, thereby realizing the test of the static load of the test pile 1; when it is necessary to adjust the pressure of the pressure plate 13 on the test pile 1, the square slider 8 is moved by rotating the handwheel at one end of the threaded rod 20. When the square slider 8 drives the limit plate 9 and the limit roller 10 away from one end of the hinged plate 14, the force arm on one side of the hinged plate 14 increases. According to the lever principle, when the output end of the jack 15 rises to the same height, the pressure of the pressure plate 13 on the test pile 1 will increase. On the contrary, when the limit plate 9 and the limit roller 10 are close to one end of the hinged plate 14, the pressure on the test pile 1 will decrease, thereby improving the flexibility of the test device.

[0021] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0022] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A simple rotary bored pile static load test device, comprising a test pile (1), an anchor pile (2), Features: The upper surface of the anchor pile (2) is fixedly connected to the bottom plate (3), the upper surface of the bottom plate (3) is fixedly connected to two symmetrical fixed plates (4), the side of the fixed plate (4) is hinged to one end of the rotating plate (5), the side of the fixed plate (4) is hinged to one end of the hydraulic cylinder (6), a slide groove (7) is provided on the side of the rotating plate (5), a square slider (8) is provided inside the slide groove (7), one end of the square slider (8) is fixedly connected to a limit plate (9), the side of the limit plate (9) is rotatably connected to one end of two symmetrical limit rollers (10), a cross beam (11) is provided on the side of the limit plate (9), and the cross beam ( One end of the crossbeam (11) is hinged to the hinge plate one (12), one end of the hinge plate one (12) is hinged to the pressure plate (13), the other end of the crossbeam (11) is hinged to the hinge plate two (14), one end of the hinge plate two (14) is hinged to the output end of the jack (15), the bottom of the jack (15) is fixedly connected to the lifting plate (16), the bottom of the lifting plate (16) is fixedly connected to the threaded column (17), the upper surface of the anchor pile (2) is rotatably connected to the bottom of the sleeve (18), the side of the rotating plate (5) is fixedly connected to two ear plates (19), and the ear plate (19) is rotatably connected to one end of the threaded rod (20).

2. A simple rotary bored pile static load test device according to claim 1, Features: The fixed plate (4) is a double-layer structure. The number of the fixed plates (4) is two and they are symmetrically distributed. The top of the fixed plate (4) is hinged to one end of the rotating plate (5). The rotating plate (5) is hinged to the output end of the hydraulic cylinder (6) through a hinge plate. The other end of the hydraulic cylinder (6) is hinged to the side of the fixed plate (4) through a hinge plate. The lifting plate (16) is located between the two fixed plates (4). The lifting plate (16) is slidably connected to the side of the fixed plate (4).

3. A simple rotary bored pile static load test device according to claim 1, Features: The inner diameter of the slide groove (7) is matched with the outer diameter of the square slider (8), and the square slider (8) is slidably connected to the inside of the slide groove (7).

4. A simple rotary bored pile static load test device according to claim 1, Features: The number of the square sliders (8) is two and they are symmetrically distributed. A threaded hole is provided on the side of one of the square sliders (8), and the square slider (8) is threadedly connected to the threaded rod (20) through the threaded hole. A circular through hole is provided on the side of the other square slider (8), and the square slider (8) is slidably connected to the limit rod through the circular through hole, and both ends of the limit rod are fixedly connected to the ear plate (19).

5. A simple rotary bored pile static load test device according to claim 1, Features: The cross beam (11) is located between two limit rollers (10), the limit roller (10) is located between two limit plates (9), the two ends of the limit roller (10) are rotatably connected to the side of the limit plate (9), and the hinge plate 1 (12) and the hinge plate 2 (14) are respectively hinged to the two ends of the cross beam (11).

6. A simple rotary bored pile static load test device according to claim 1, Features: The bottom of the sleeve (18) is rotatably connected to the bottom plate (3) via a bearing, a threaded hole is provided inside the sleeve (18), and the sleeve (18) is threadedly connected to the outer side of the threaded column (17) via the threaded hole.

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