Device for multi-angle adjustment of foundation pit slope anchor rod uplift test

Abstract

The application is a base device for multi-angle adjustment of foundation pit slope anchor rod anti-pulling test, which comprises a base and a turnover plate, the base is fixed along the foundation pit slope, and the turnover plate is rotationally connected to the base; further comprising an angle adjustment mechanism, the angle adjustment mechanism is arranged on the base, and is used for angle turning of the turnover plate; a positioning mechanism, the positioning mechanism is arranged on the base, and is used for positioning and guiding of anchor rod installation; a locking mechanism, the locking mechanism is arranged on the base, and is used for slope fixation of the base, having the effect of uniform detection of anchor rod stress.

Description

Technical Field

[0001] This invention relates to the technical field of foundation pit anchoring, and in particular, to a device for multi-angle adjustment of anchor bolt pull-out tests on foundation pit slopes. Background Technology

[0002] Anchor bolts are an important means of foundation pit and slope protection. Compared with support piles, they are more economical and easier to construct, and are therefore widely used in foundation pit and slope protection projects.

[0003] During foundation pit support, the pit is generally excavated using a plumb bob, occasionally with sloping excavation. Slope support typically requires sloping excavation, and the pit surface or slope surface may be at a certain angle to the vertical. When using anchor bolt support, the anchor bolts are inclined downwards at a certain angle (15°–25°) to the horizontal, therefore the direction of the anchor bolts is generally not perpendicular to the support surface. To ensure the accuracy of the test data, the anchor bolt testing specification requires that the anchor bolt being tested and the testing jack be on the same axis. This specification requires that the anchor bolt to be tested must be perpendicular to the testing platform surface (or support surface). During on-site anchor bolt testing, after the jack is set up, there is generally a large gap between the bottom plane of the jack's tail and the testing platform surface (or support surface), and the jack is not perpendicular to the testing platform surface (or support surface). When loading is applied directly at this point, the anchor rod is gradually bent under the load of the jack until the bottom plane of the jack is in contact with the testing platform (or support surface). At this point, "equilibrium" has not been reached; however, the anchor rod is actually severely bent. If loading continues until the testing load is reached and testing is stopped, the test data will be severely distorted. Even worse, some anchor rods may not reach "equilibrium" even until the testing load is reached, greatly reducing the reasonableness of the test results. The data obtained through the above method clearly has problems, but this problem has remained unresolved.

[0004] To address the shortcomings of the existing technology, this invention provides a device for multi-angle adjustment of anchor bolts in foundation pit slope pull-out tests. Summary of the Invention

[0005] This invention provides a device for multi-angle adjustment of anchor bolts in foundation pit slope pull-out tests. This addresses the problem in existing technologies where, after the anchor bolt is subjected to force, the bolt body is gradually bent under the load of the jack until the bottom plane of the jack is in contact with the test platform (or support surface), at which point "equilibrium" is not reached; however, the anchor bolt is actually severely bent at this point, and continuing to load to the test load and then stopping the test results in severely distorted test data; even worse, some anchor bolts reach "equilibrium" even after reaching the test load, significantly reducing the reliability of the test results.

[0006] According to one aspect of the present invention, a device for multi-angle adjustment of anchor bolt pull-out tests on foundation pit slopes is provided, comprising: a base and a flipping plate, wherein the base is fixed along the inclined surface of the foundation pit, and the flipping plate is rotatably connected to the base; further comprising: An angle adjustment mechanism is provided on the base and is used to rotate the flip plate. A positioning mechanism is provided on the base and is used to position and guide the installation of the anchor bolt. A locking mechanism is provided on the base and is used to fix the base at an incline.

[0007] By adopting the above technical solution, when the anchor rod is installed stably, the anchor rod is inserted horizontally along the positioning mechanism on the base and the slope through the flip plate, ensuring that the anchor rod is perpendicular to the flip plate when pulled, which has the effect of detecting the uniform force on the anchor rod.

[0008] Furthermore, the angle adjustment mechanism includes a connecting rod, a sliding groove, a slider, and a drive screw. The sliding groove is arranged along the base, and the slider is slidably arranged along the sliding groove. One end of the connecting rod is hinged to the flip plate, and the other end of the connecting rod is hinged to the slider. The drive screw is threaded through the slider and located in the sliding groove, and is rotatably connected to the base. A transmission component is provided on the drive screw, and the transmission component is used to drive the drive screw to rotate.

[0009] Furthermore, the transmission assembly includes a worm gear and a worm, the worm gear being fixedly connected to the end of the drive screw, a mounting bracket being mounted on the base, the worm being rotatably connected along the mounting bracket, and the worm gear engaging with the worm for transmission.

[0010] Furthermore, the positioning mechanism includes a positioning cylinder, a rotating shaft, and a waist-shaped hole. The waist-shaped hole is disposed on the base. The flip plate is provided with a mounting hole corresponding to the waist-shaped hole. The rotating shaft is disposed on the peripheral wall of the positioning cylinder. The base is provided with a guide groove at the position of the waist-shaped hole. The rotating shaft drives the positioning cylinder to move along the guide groove. The anchor rod passes through the mounting hole and cooperates with the positioning cylinder on the waist-shaped hole for installation.

[0011] Furthermore, the end of the positioning cylinder facing the ground is arc-shaped and the outer wall of the opening is narrowed to facilitate stable insertion of the positioning cylinder into the grouting hole of the anchor rod.

[0012] Furthermore, the flip plate is equipped with a lock head, which is used to lock and fix the anchor rod after it has been inserted and fixed.

[0013] Furthermore, an angle detector is provided on the flip plate, which is used to measure the flip angle of the flip plate and can adjust the flip angle between the flip plate and the base in real time to adapt to the injection of the anchor rod.

[0014] Furthermore, the locking mechanism includes a locking tube, a locking rod, and a locking part. The locking tube is disposed on the base and the end of the locking tube facing the ground is tapered. The locking rod is disposed inside the locking tube, and the locking part is disposed on the locking rod. The locking part connects the locking tube to the ground for stable connection to lock the base. The locking rod is threadedly connected to the locking tube.

[0015] Furthermore, the locking part includes a plug rod, which is arranged along the periphery of the locking rod. The locking tube is provided with a through hole, and the plug rod passes through the through hole to contact and lock with the ground.

[0016] Furthermore, a tension spring is provided inside the locking rod. One end of the tension spring is fixedly connected to the bottom of the locking tube, and the other end of the tension spring is fixedly connected to the locking rod. The tension spring is used to pull and lock the locking rod.

[0017] The present invention has the following beneficial effects: This invention provides a device for multi-angle adjustment of anchor bolt pull-out tests on foundation pit slopes. When fixing the anchor bolt, the base and the flip plate are fixed on the slope. The anchor bolt is inserted into the slope along the flip plate through the positioning cylinder. The positioning cylinder is moved along the base for positioning and installation. The angle of the flip plate is adjusted to keep the anchor bolt horizontally inserted into the slope. This device has the effect of uniformly detecting the stress on the anchor bolt.

[0018] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 2 yes Figure 1 Enlarged structural diagram at point A in the middle.

[0020] Legend: 1. Base; 2. Flip plate; 3. Angle adjustment mechanism; 31. Connecting rod; 32. Slide groove; 33. Slider; 34. Drive screw; 35. Worm gear; 36. Worm; 4. Positioning mechanism; 41. Positioning cylinder; 42. Rotating shaft; 43. Waist-shaped hole; 5. Lock head; 6. Angle detector; 7. Locking mechanism; 71. Locking rod; 72. Insert rod; 73. Tension spring. Detailed Implementation

[0021] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0022] Example 1 like Figure 1 , Figure 2 As shown in the figure, this embodiment discloses a device for multi-angle adjustment of anchor bolt pull-out test on foundation pit slope, including: a base 1 and a flipping plate 2, an angle adjustment mechanism 3, a positioning mechanism 4, and a locking mechanism 7. The base 1 is fixed along the slope of the foundation pit, and the flipping plate 2 is rotatably connected to the base 1; the angle adjustment mechanism 3 is set on the base 1 and is used to flip the angle of the flipping plate 2; the positioning mechanism 4 is set on the base 1 and is used to position and guide the installation of the anchor bolt; the locking mechanism 7 is set on the base 1 and is used to fix the base 1 on the slope. When the anchor bolt is installed stably, the anchor bolt is inserted horizontally along the positioning mechanism 4 on the base 1 and the slope by passing through the flipping plate 2, ensuring that the anchor bolt is perpendicular to the flipping plate 2 when pulled, which has the effect of detecting the uniform force on the anchor bolt.

[0023] To ensure the anchor bolt is horizontal when it penetrates the ground, an angle adjustment mechanism 3 is installed to adjust the angle of the flip plate 2. The angle adjustment mechanism 3 includes a connecting rod 31, a sliding groove 32, a slider 33, and a drive screw 34. The sliding groove 32 is arranged along the base 1, and the slider 33 slides along the sliding groove 32. One end of the connecting rod 31 is hinged to the flip plate 2, and the other end of the connecting rod 31 is hinged to the slider 33. The drive screw 34 is threaded through the slider 33 and located in the sliding groove 32, and is rotatably connected to the base 1. A transmission component is provided on the drive screw 34 to drive the drive screw 34 to rotate. The transmission component includes a worm gear 35 and a worm 36. The worm gear 35 is fixedly connected to the end of the drive screw 34. A mounting bracket is provided on the base 1, and the worm 36 is rotatably connected along the mounting bracket. The worm gear 35 and the worm 36 mesh and transmit power.

[0024] The positioning mechanism 4 includes a positioning cylinder 41, a rotating shaft 42, and a waist-shaped hole 43. The waist-shaped hole 43 is set on the base 1, and the flip plate 2 is provided with a mounting hole corresponding to the waist-shaped hole 43. The rotating shaft 42 is set on the peripheral wall of the positioning cylinder 41. The base 1 is provided with a guide groove at the position of the waist-shaped hole 43. The rotating shaft 42 drives the positioning cylinder 41 to move along the guide groove. The anchor rod passes through the mounting hole and cooperates with the positioning cylinder 41 on the waist-shaped hole 43 for installation. The positioning cylinder 41 moves and flips along the base 1 to correspond with the anchor rod on the flip plate 2 to ensure that the anchor rod is stably inserted into the slope.

[0025] To facilitate stable insertion of the positioning cylinder 41 into the slope, the end of the positioning cylinder 41 facing the ground is arc-shaped, and the outer wall of the opening is narrowed to allow for stable insertion of the positioning cylinder 41 into the grouting hole of the anchor rod. A locking head 5 is provided on the flip plate 2 to lock and secure the anchor rod after insertion. An angle detector 6 is provided on the flip plate 2 to measure the flipping angle of the flip plate 2, allowing for real-time adjustment of the flipping angle between the flip plate 2 and the base 1 to accommodate the injection of the anchor rod.

[0026] To stably fix the base 1 to the slope, a locking mechanism 7 is provided. The locking mechanism 7 includes a locking tube, a locking rod 71, and a locking part. The locking tube is set on the base 1, with the end of the locking tube facing the ground being tapered. The locking rod 71 is set inside the locking tube, and the locking part is set on the locking rod 71. The locking part connects the locking tube to the ground for a stable connection to lock the base 1. The locking rod 71 is threadedly connected to the locking tube. The locking part includes an insertion rod 72, which is arranged along the periphery of the locking rod 71. The locking tube has a through hole, and the insertion rod 72 passes through the through hole to contact and lock with the ground. A tension spring 73 is set inside the locking rod 71. One end of the tension spring 73 is fixedly connected to the bottom of the locking tube, and the other end of the tension spring 73 is fixedly connected to the locking rod 71. The tension spring 73 is used to pull and lock the locking rod 71.

[0027] The working principle of the device for multi-angle adjustment of anchor bolt pull-out test on foundation pit slope in this embodiment is as follows: When fixing the anchor bolt, the base 1 and the flip plate 2 are fixed on the slope, and the anchor bolt is inserted into the slope along the flip plate 2 through the positioning cylinder 41. The positioning cylinder 41 is moved along the base 1 for positioning and installation. The angle of the flip plate 2 is adjusted to keep the anchor bolt horizontally inserted into the slope, which has the effect of uniform detection of anchor bolt force.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for multi-angle adjustment of anchor bolts in foundation pit slope pull-out tests, characterized in that: include: The base (1) and the flip plate (2) are provided, wherein the base (1) is fixed along the inclined surface of the pit, and the flip plate (2) is rotatably connected to the base (1); the base (1) also includes: An angle adjustment mechanism (3) is disposed on the base (1) and is used to rotate the flip plate (2) at an angle. Positioning mechanism (4), which is disposed on the base (1), is used to position and guide the installation of the anchor rod; A locking mechanism (7) is provided on the base (1) and is used to fix the base (1) on a slope. The angle adjustment mechanism (3) includes a connecting rod (31), a slide groove (32), a slider (33), and a drive screw (34). The slide groove (32) is arranged along the base (1), and the slider (33) is slidably arranged along the slide groove (32). One end of the connecting rod (31) is hinged to the flip plate (2), and the other end of the connecting rod (31) is hinged to the slider (33). The drive screw (34) is threaded through the slider (33) and located in the slide groove (32) and rotatably connected to the base (1). A transmission component is provided on the drive screw (34), and the transmission component is used to drive the drive screw (34) to rotate. The transmission assembly includes a worm wheel (35) and a worm (36). The worm wheel (35) is fixedly connected to the end of the drive screw (34). A mounting bracket is provided on the base (1). The worm (36) is rotatably connected along the mounting bracket. The worm wheel (35) and the worm (36) mesh and transmit power. The positioning mechanism (4) includes a positioning cylinder (41), a rotating shaft (42), and a waist-shaped hole (43). The waist-shaped hole (43) is provided on the base (1). The flip plate (2) is provided with a mounting hole corresponding to the waist-shaped hole (43). The rotating shaft (42) is provided on the peripheral wall of the positioning cylinder (41). The base (1) is provided with a guide groove at the position of the waist-shaped hole (43). The rotating shaft (42) drives the positioning cylinder (41) to move along the guide groove. The anchor rod passes through the mounting hole and cooperates with the positioning cylinder (41) on the waist-shaped hole (43) for installation. The positioning cylinder (41) is arc-shaped at the end facing the ground and the outer wall of the opening is narrowed to facilitate stable insertion of the positioning cylinder (41) into the grouting hole of the anchor rod.

2. The device for multi-angle adjustment of anchor bolt pull-out test on foundation pit slope according to claim 1, characterized in that: The flip plate (2) is provided with a lock head (5), which is used to lock and fix the anchor rod after it has been inserted and fixed.

3. The device for multi-angle adjustment of anchor bolt pull-out test on foundation pit slope according to claim 1, characterized in that: An angle detector (6) is provided on the flip plate (2). The angle detector (6) is used to measure the flip angle of the flip plate (2). The flip angle between the flip plate (2) and the base (1) can be adjusted in real time to adapt to the injection of the anchor rod.

4. The device for multi-angle adjustment of anchor bolt pull-out test on foundation pit slope according to claim 3, characterized in that: The locking mechanism (7) includes a locking tube, a locking rod (71) and a locking part. The locking tube is disposed on the base (1) and the end of the locking tube facing the ground is tapered. The locking rod (71) is disposed inside the locking tube. The locking part is disposed on the locking rod (71). The locking part connects the locking tube to the ground and is stably connected to lock the base (1). The locking rod (71) is threadedly connected to the locking tube.

5. The device for multi-angle adjustment of anchor bolt pull-out test on foundation pit slope according to claim 4, characterized in that: The locking part includes a plug rod (72), which is arranged along the periphery of the locking rod (71). The locking tube is provided with a through hole, and the plug rod (72) passes through the through hole and contacts the ground for locking.

6. The device for multi-angle adjustment of anchor bolt pull-out test on foundation pit slope according to claim 5, characterized in that: A tension spring (73) is provided inside the locking rod (71). One end of the tension spring (73) is fixedly connected to the bottom of the locking tube, and the other end of the tension spring (73) is fixedly connected to the locking rod (71). The tension spring (73) is used to pull and lock the locking rod (71).

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