Pre-stressed anchor cable structure for foundation pit supporting

Abstract

The utility model relates to a pre-stressed anchor cable structure for foundation pit supporting, which belongs to the technical field of foundation pit supporting and comprises a foundation pit body, pre-stressed anchor cable bodies are arranged in the foundation pit body at equal intervals, each pre-stressed anchor cable body is composed of a plurality of anchor cable strips, and sleeves are arranged on the outer sides of the pre-stressed anchor cable bodies at equal intervals. And mounting grooves II are formed in the sleeve at equal intervals. The pre-stressed anchor cable has the advantages that the pre-stressed anchor cable body is formed by spirally winding the anchor cable strips, so that the overall tensile effect of the pre-stressed anchor cable body is improved, the clamping plate in the second mounting groove can be pushed along with tightening of the circular ring, the clamping plate is forced to be unfolded outwards, the rotating piece and the T-shaped barb are pushed to be inserted into a drill hole, and the anti-pulling effect is improved. Therefore, the connection relation between the pre-stressed anchor cable body and the drill hole can be improved, the tensile resistance of the pre-stressed anchor cable body can be improved, the pre-stressed anchor cable body is prevented from moving after being fixed, and the phenomena of drill hole collapse and the like can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit support technology, and in particular to a prestressed anchor cable structure for foundation pit support. Background Technology

[0002] In building construction, it is usually necessary to excavate foundation pits. Foundation pits are earthen pits excavated at the foundation design location according to the base elevation and foundation plane dimensions. Foundation pits are mainly used for the construction of pile caps, bridge abutments, and spread foundations. Foundation pit support refers to the temporary support, reinforcement, protection, and groundwater control measures adopted for foundation pits to protect the construction of underground main structures and the safety of the surrounding environment. Stressed anchor cables refer to cable-like supports that are anchored in the rock mass using prestressing methods. They are used to reinforce slopes. The anchor cable is inserted into the rock mass through a hole in the weak structural surface of the rock mass by the anchor head, connecting the sliding body with the stable rock layer, thereby changing the stress state of the slope rock mass and improving the integrity and strength of the unstable rock mass of the slope.

[0003] However, in existing anchor cable structures, due to the relatively simple fixing method of the anchor cables, there is no good tensile strength during the grouting and pre-setting process. The prestressed anchor cables will slip, which can easily lead to problems such as the collapse of the foundation pit holes. Utility Model Content

[0004] In view of the above-mentioned problems in the prior art, the main objective of this utility model is to provide a prestressed anchor cable structure for foundation pit support.

[0005] The technical solution of this utility model is as follows: a prestressed anchor cable structure for foundation pit support includes a foundation pit body, prestressed anchor cable bodies are equidistantly arranged inside the foundation pit body, the prestressed anchor cable bodies are composed of multiple anchor cable strips, sleeves are equidistantly arranged on the outer side of the prestressed anchor cable bodies, and installation grooves are equidistantly opened inside the sleeves. Rotating components are rotatably installed on the inner wall of each of the installation grooves. A snap-fit ​​plate is fixedly connected to the side of each rotating component near the sleeve, and a T-shaped barb is fixedly connected to the side of each rotating component away from the snap-fit ​​plate. A locking mechanism is provided on one side of the sleeve, and a tensile mechanism is provided on the other side of the sleeve.

[0006] By adopting the above technical solution, as the ring is tightened, it will push the snap-fit ​​plate in the second mounting groove, forcing the snap-fit ​​plate to unfold outward, thereby pushing the rotating part and the T-shaped barb into the drill hole, which can improve the tensile strength of the prestressed anchor cable body and prevent the prestressed anchor cable body from moving after fixing.

[0007] In a preferred embodiment, the locking mechanism includes a ring disposed on the outside of the sleeve, a snap ring fixedly connected to the side of the ring near the sleeve, an internal thread provided on the inner wall of the ring, and an external threaded ring that mates with the internal thread fixedly connected to the side of the sleeve near the ring, the external threaded ring being threadedly connected to the ring.

[0008] By adopting the above technical solution, the ring is screwed to make it threadedly connected to the external threaded ring, and at the same time, the snap ring can be driven into the interior of the second mounting groove. On the one hand, it can push the rotating part to form a good tensile force, and on the other hand, it can tighten the sleeve.

[0009] In a preferred embodiment, the tensile mechanism includes a plurality of mounting grooves 1 formed on the side of mounting groove 1 away from the annulus. The inner wall of each mounting groove 1 is rotatably connected to a hook, and a torsion spring is fixedly installed between the inner wall of each mounting groove 1 and the hook.

[0010] By adopting the above technical solution, when the drill rod is pulled out, the hooks will be pushed by the torsion spring, unfold one by one, and lock the hooks into the inner wall of the borehole.

[0011] In a preferred embodiment, the sleeve has a mating groove inside that mates with the snap-fit ​​ring. The mating groove abuts against one side of the snap-fit ​​plate, and one side of the snap-fit ​​plate has an inclined surface.

[0012] By adopting the above technical solution, the inclined surface is designed to facilitate the locking ring to push the locking plate to rotate.

[0013] In a preferred embodiment, the outer side of the rotating component and both sides of the T-shaped barb are fixedly connected with second reinforcing ribs at equal intervals, and the outer side of the T-shaped barb is provided with anti-slip spikes.

[0014] By adopting the above technical solution and setting the second reinforcing rib, the connection strength between the T-shaped barb and the rotating part can be enhanced.

[0015] In a preferred embodiment, the inner wall of the foundation pit body is provided with first reinforcing ribs at equal intervals, and a fixing plate is fixedly installed on the side of the prestressed anchor cable body that is exposed through the duct, and the first reinforcing ribs are fixedly connected to the fixing plate.

[0016] By adopting the above technical solution and setting the first reinforcing rib, the connection between the prestressed anchor cable body and the foundation pit body can be strengthened.

[0017] In a preferred embodiment, two mounting plates are fixedly connected to both sides of the first reinforcing rib, and each mounting plate is provided with a ground pile. The foundation pit body and the mounting plate are connected by the ground piles.

[0018] By adopting the above technical solution, and through the combined use of mounting plates and ground piles, the first reinforcing bar is fixed in the inner wall of the foundation pit body.

[0019] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0020] 1. In this utility model, the prestressed anchor cable body is formed by spirally winding multiple anchor cable strips, thereby increasing the overall tensile strength of the prestressed anchor cable body. By twisting the ring, the ring is threadedly connected to the external threaded ring, which simultaneously drives the snap ring into the interior of the second mounting groove. On the one hand, this pushes the rotating part to form a better tensile force, and on the other hand, it tightens the sleeve, fixing the sleeve to the outside of the prestressed anchor cable body. As the ring tightens, it pushes the snap plate in the second mounting groove, forcing the snap plate to unfold outward, thereby pushing the rotating part and the T-shaped barb into the drill hole. This improves the connection between the prestressed anchor cable body and the drill hole, thereby increasing the tensile strength of the prestressed anchor cable body and preventing the prestressed anchor cable body from moving after fixing, thus reducing phenomena such as drill hole collapse.

[0021] 2. In this utility model, when the drill rod is pulled out, the hooks will be pushed by the torsion spring, unfold one by one, and lock the hooks into the inner wall of the borehole, which further improves the tensile strength of the prestressed anchor cable body. Attached Figure Description

[0022] Figure 1 This utility model provides an overall perspective view of a prestressed anchor cable structure for foundation pit support;

[0023] Figure 2 This utility model provides a three-dimensional view of a prestressed anchor cable structure for foundation pit support.

[0024] Figure 3 This utility model provides a sleeve plan view of a prestressed anchor cable structure for foundation pit support;

[0025] Figure 4 This utility model provides a prestressed anchor cable structure for foundation pit support. Figure 3 Enlarged view of point A in the middle.

[0026] Legend: 1. Foundation pit body; 2. Prestressed anchor cable body; 3. Anchor cable strip; 4. First reinforcing rib; 5. Ground pile; 6. Mounting plate; 7. Fixing disc; 8. Sleeve; 9. Mounting groove one; 10. Torsion spring; 11. Hook; 12. External threaded ring; 13. Circular ring; 14. Snap-fit ​​ring; 15. Mating groove; 16. T-shaped barb; 17. Second reinforcing rib; 18. Adapter; 19. Snap-fit ​​plate. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] Reference Figure 1-4 A prestressed anchor cable structure for foundation pit support includes a foundation pit body 1. Prestressed anchor cable bodies 2 are equidistantly arranged inside the foundation pit body 1. Each prestressed anchor cable body 2 is composed of multiple anchor cable strips 3. Sleeves 8 are equidistantly arranged on the outer side of each prestressed anchor cable body 2. Installation grooves 2 are equidistantly opened inside each sleeve 8. Rotating components 18 are rotatably installed on the inner wall of each installation groove 2. A snap-fit ​​plate 19 is fixedly connected to the side of each rotating component 18 near the sleeve 8, and a T-shaped barb 16 is fixedly connected to the side of each rotating component 18 away from the snap-fit ​​plate 19. A locking mechanism is provided on one side of each sleeve 8. On the other side, a tensile mechanism is provided. The prestressed anchor cable body 2 is formed by spirally winding multiple anchor cable strips 3, which increases the overall tensile strength of the prestressed anchor cable body 2. As the ring 13 is tightened, it pushes the snap plate 19 in the installation groove 2, forcing the snap plate 19 to unfold outward, thereby pushing the rotating part 18 and the T-shaped barb 16 into the drill hole. This can improve the connection between the prestressed anchor cable body 2 and the drill hole, thereby increasing the tensile strength of the prestressed anchor cable body 2 and preventing the prestressed anchor cable body 2 from moving after being fixed, thus reducing phenomena such as drill hole collapse.

[0029] Reference Figure 2 The locking mechanism includes a ring 13 disposed on the outside of the sleeve 8. A snap ring 14 is fixedly connected to the side of the ring 13 near the sleeve 8. The inner wall of the ring 13 is provided with an internal thread. An external threaded ring 12 that mates with the internal thread is fixedly connected to the side of the sleeve 8 near the ring 13. The external threaded ring 12 is threadedly connected to the ring 13. By turning the ring 13, the ring 13 is threadedly connected to the external threaded ring 12. At the same time, the snap ring 14 can be driven into the interior of the second mounting groove. On the one hand, it can push the rotating part 18 to form a better tensile force. On the other hand, it can tighten the sleeve 8 so that the sleeve 8 can be fixed on the outside of the prestressed anchor cable body 2.

[0030] Reference Figure 2 The tensile mechanism includes multiple mounting slots 9 on the side of the mounting slot 9 away from the ring 13. The inner wall of each mounting slot 9 is rotatably connected to a hook 11. A torsion spring 10 is fixedly installed between the inner wall of the mounting slot 9 and the hook 11. When the drill rod is pulled out, the hook 11 will be pushed by the torsion spring 10, unfolding one by one and locking the hook 11 into the inner wall of the borehole, which further improves the tensile effect of the prestressed anchor cable body 2.

[0031] Reference Figure 3 The sleeve 8 has a mating groove 15 inside that works with the snap ring 14. The mating groove 15 abuts against one side of the snap plate 19. One side of the snap plate 19 has an inclined surface, which allows the snap ring 14 to push the snap plate 19 to rotate.

[0032] Reference Figure 2 The outer side of the rotating part 18 and both sides of the T-shaped barb 16 are fixedly connected with second reinforcing ribs 17 at equal intervals. The outer side of the T-shaped barb 16 is provided with anti-slip spikes. By setting the second reinforcing ribs 17, the connection strength between the T-shaped barb 16 and the rotating part 18 can be strengthened, and the rotating part 18 can be prevented from breaking and losing its tensile strength during use.

[0033] Reference Figure 1 The inner wall of the foundation pit body 1 is provided with first reinforcing ribs 4 at equal intervals. The prestressed anchor cable body 2 is fixedly installed on the side of the exposed hole. The first reinforcing ribs 4 are fixedly connected to the fixed plate 7. By setting the first reinforcing ribs 4, the connection between the prestressed anchor cable body 2 and the foundation pit body 1 can be strengthened, and the collapse of the inner wall of the foundation pit body 1 caused by the prestressed anchor cable body 2 during use can be avoided.

[0034] Reference Figure 1 Two mounting plates 6 are fixedly connected to both sides of the first reinforcing rib 4. Each mounting plate 6 has a ground pile 5 inside. The foundation pit body 1 is connected to the mounting plate 6 through the ground pile 5. By using the mounting plate 6 and the ground pile 5 together, the first reinforcing rib 4 is fixed in the inner wall of the foundation pit body 1, and the exposed end of the prestressed anchor cable body 2 is fixed.

[0035] Working principle: First, after the drilling rig is in place, the drilling angle of the drill rod is adjusted according to the designed hole position and angle. Only after the on-site personnel have checked and approved the angle with a protractor can drilling officially begin. The drill rod is driven through the soil layer section by section using a drilling rig until the required drilling depth is reached. The drilling depth generally exceeds the designed anchor cable length by 0.5m. The soil in the middle of the drill rod is cleaned using a soil-cleaning device. Then, the prestressed anchor cable body 2 is placed into the borehole, and the sleeve 8 is fitted over it. The prestressed anchor cable body 2 is formed by multiple anchor cable strips 3 spirally wound together, thus increasing the overall tensile strength of the prestressed anchor cable body 2. Then, the drill rod is pulled out. After the drill rod is pulled out, the hook... The prestressed anchor cable body 2 is pushed by the torsion spring 10 and unfolds, locking the hook 11 into the inner wall of the borehole, which further improves the tensile strength of the prestressed anchor cable body 2. Then, the ring 13 is tightened with the corresponding sleeve 8 using external tools. As the ring 13 is tightened, it pushes the snap plate 19 in the second mounting groove, forcing the snap plate 19 to unfold outward, thereby pushing the rotating part 18 and the T-shaped barb 16 into the borehole. This improves the connection between the prestressed anchor cable body 2 and the borehole, thereby improving the tensile strength of the prestressed anchor cable body 2 and preventing the prestressed anchor cable body 2 from moving after fixing, thus reducing the phenomenon of borehole collapse. Finally, grouting is performed inside the borehole.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0037] The above are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A prestressed anchor cable structure for foundation pit support, comprising a foundation pit body (1), characterized in that: The foundation pit body (1) is provided with prestressed anchor cable bodies (2) at equal intervals inside. The prestressed anchor cable body (2) is composed of multiple anchor cable strips (3). The prestressed anchor cable body (2) is provided with sleeves (8) at equal intervals on the outside. The sleeves (8) are provided with installation grooves at equal intervals inside. The inner walls of the installation grooves are rotatably installed with rotating parts (18). The side of the rotating parts (18) close to the sleeves (8) is fixedly connected with a snap-fit ​​plate (19). The side of the rotating parts (18) away from the snap-fit ​​plate (19) is fixedly connected with a T-shaped barb (16). A locking mechanism is provided on one side of the sleeves (8). A tensile mechanism is provided on the other side of the sleeves (8).

2. The prestressed anchor cable structure for foundation pit support according to claim 1, characterized in that: The locking mechanism includes a ring (13) disposed on the outside of the sleeve (8). A snap ring (14) is fixedly connected to the side of the ring (13) near the sleeve (8). The inner wall of the ring (13) is provided with an internal thread. An external threaded ring (12) that mates with the internal thread is fixedly connected to the side of the sleeve (8) near the ring (13). The external threaded ring (12) is threadedly connected to the ring (13).

3. A prestressed anchor cable structure for foundation pit support according to claim 1, characterized in that: The tensile mechanism includes multiple mounting slots (9) opened on the side of mounting slot (9) away from the ring (13). The inner wall of each mounting slot (9) is rotatably connected to a hook (11). A torsion spring (10) is fixedly installed between the inner wall of each mounting slot (9) and the hook (11).

4. A prestressed anchor cable structure for foundation pit support according to claim 1, characterized in that: The sleeve (8) has a mating groove (15) inside that is used to engage with the snap ring (14). The mating groove (15) abuts against one side of the snap plate (19), and one side of the snap plate (19) is provided with an inclined surface.

5. A prestressed anchor cable structure for foundation pit support according to claim 1, characterized in that: The outer side of the rotating part (18) and both sides of the T-shaped barb (16) are fixedly connected with second reinforcing ribs (17) at equal intervals, and the outer side of the T-shaped barb (16) is provided with anti-slip spikes.

6. A prestressed anchor cable structure for foundation pit support according to claim 1, characterized in that: The inner wall of the foundation pit body (1) is provided with first reinforcing ribs (4) at equal intervals. The prestressed anchor cable body (2) is fixedly installed with a fixing plate (7) on the side of the exposed hole. The first reinforcing ribs (4) are fixedly connected to the fixing plate (7).

7. A prestressed anchor cable structure for foundation pit support according to claim 6, characterized in that: Two mounting plates (6) are fixedly connected to both sides of the first reinforcing rib (4). Each mounting plate (6) is equipped with a ground pile (5). The foundation pit body (1) and the mounting plate (6) are connected by the ground pile (5).

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