Non-tensioning anchor cable rapid unloading anchorage device dismounting support

Abstract

The utility model belongs to the technical field of rock-soil anchoring engineering, and particularly relates to a non-tensioning anchor cable rapid unloading anchorage device dismantling support which comprises a steel strand, an anchor plate, a top core and a sand box. The sand box is arranged on the waist beam, sand is arranged in the sand box, the top core is arranged in the sand box in a sliding mode, a lower end plate of the top core is located at the top of the sand, the anchor plate is arranged on an upper end plate of the top core, the steel strand penetrates through the anchor plate, the top core and an installation hole in the sand box in sequence and then penetrates into the waist beam, a clamping groove is formed in the anchor plate, and a clamping piece is arranged in the clamping groove. The steel strand is tensioned with the anchor plate through the matching of the clamping groove and the clamping piece; a sand outlet hole is formed in one side of the bottom of the sand box, and a water inlet hole is formed in the other side. According to the utility model, the required operation space is small, and the device can be used in a narrow foundation pit; meanwhile, the anchor cable does not need to be tensioned repeatedly, time and labor are saved, the risk that the steel strand is broken can be avoided, unloading and dismantling work can be carried out conveniently, use is convenient, and efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of geotechnical anchorage engineering, and particularly relates to a non-tensioning cable anchor rapid unloading anchor removal support. Background Art

[0002] A prestressed cable is a cable anchored inside a rock mass by prestressing to reinforce a slope. After reinforcement, unloading or removal is required. Currently, when unloading or removing the anchor of a prestressed cable, the common method is to extract the wedge by tensioning the steel strand. This construction method has the following problems: First, tensioning requires a certain operating space, and it is difficult to have enough operating space for recoverable cables in a foundation pit; second, repeatedly installing and disassembling the tensioning equipment is labor-intensive and time-consuming; third, the wedge can only be removed when the steel strand has a certain elongation. When the axial force of the cable is large or the free section is short, when the elongation for removing the wedge is reached, the internal force of the steel strand may exceed the bearing capacity limit, posing a risk of fracture. The above problems indicate that the current cables and their supports are not convenient for unloading and removal work, affecting the construction efficiency. Content of the Utility Model

[0003] To solve the problems of the prior art, the utility model proposes a non-tensioning cable anchor rapid unloading anchor removal support to solve the problem that the current cables and their supports are not convenient for unloading and removal work.

[0004] The purpose of the utility model and the solution to its technical problems are achieved by the following technical solutions. A non-tensioning cable anchor rapid unloading anchor removal support according to the utility model includes a steel strand, an anchor plate, a top core, and a sand box; the sand box is arranged on the waist beam and is filled with sand inside. The top core slides inside the sand box, and the lower end plate of the top core is located on the top of the sand. The anchor plate is arranged on the upper end plate of the top core. The steel strand passes through the anchor plate, the top core, and the installation hole inside the sand box in sequence and then penetrates into the waist beam. The anchor plate is provided with a clamping groove, and a wedge is arranged in the clamping groove. The steel strand is tightened with the anchor plate through the cooperation of the clamping groove and the wedge. One side of the bottom of the sand box is provided with a sand outlet hole, and the other side is provided with a water inlet hole.

[0005] Further, the bottom surface of the sand box is provided with an anchor backing plate, and the anchor backing plate is fixedly connected to the waist beam.

[0006] Further, the water inlet hole is arranged directly above the sand outlet hole, and the water inlet hole and the sand outlet hole are symmetrically arranged about the axis of the installation hole of the sand box.

[0007] Further, a detachable first cap is arranged on the water inlet hole.

[0008] Further, a detachable second cap is arranged on the sand outlet hole.

[0009] Further, a scale for observing the falling amount of the top core is arranged on the outer wall of the top core of the top core.

[0010] Furthermore, the outer wall of the core top abuts against the inner side of the outer wall of the sand box. The core top is sleeved on the outer wall of the second mounting hole inside the sand box through the first mounting hole inside it, so that the core top is slidably arranged in the sand box.

[0011] Furthermore, a cavity is provided inside the core top.

[0012] Furthermore, the first mounting hole and the second mounting hole are coaxially arranged.

[0013] In summary, in the present utility model, the sand box jacks up the core top to tighten the anchor cable. When the sand flows out, the core top is pushed into the sand box by the force of the anchor cable, and the anchor head and the anchor plate also have sufficient falling distance, so that the force of the anchor cable gradually decreases until it is completely relaxed. Then, the anchor plate can be knocked to remove the wedge-shaped grip to complete the demolition. The operation requires little space and can be used in a narrow foundation pit. At the same time, there is no need to repeatedly tension the anchor cable, which saves time and effort, and can also avoid the risk of steel strand breakage, facilitating the unloading and demolition work, being convenient to use and having high efficiency.

[0014] The above description is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the following specific preferred embodiments are given and described in detail in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a non-tensioning anchor cable rapid unloading and anchorage removing support of the present utility model.

[0016] Figure 2 It is Figure 1 the cross-sectional view at A-A in

[0017] Figure 3 It is Figure 1 the cross-sectional view at B-B in

[0018] Figure 4 It is the overall schematic diagram of a non-tensioning anchor cable rapid unloading and anchorage removing support of the present application.

[0019] Wherein: 1, steel strand; 2, anchor plate; 3, core top; 4, sand box; 5, anchor backing plate; 6, sand; 7, sand outlet hole; 8, second cap; 9, water inlet hole; 10, first cap; 11, waist beam; 12, outer wall of the box; 13, second mounting hole; 14, outer wall of the core top; 15, first mounting hole; 16, lower end plate; 17, wedge-shaped grip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes the technical solution of the present utility model in conjunction with the accompanying drawings and specific preferred embodiments.

[0021] See also Figures 1 - 3 , a non-tensioned anchor cable quick unloading anchor removal support, comprising a steel strand 1, an anchor plate 2, a top core 3 and a sand box 4;

[0022] The sand box 4 is fixed to the waist beam 11 through the anchor plate 5, and is provided with sand 6. The sand used in this embodiment is core sand. The anchor plate 2 is provided on the upper end plate of the top core 3. The top core outer wall 14 of the top core 3 abuts against the inner side of the outer wall 12 of the sand box 4. A first mounting hole 15 is provided inside the top core 3. The interior of the sand box 4 is provided with a second mounting hole 13 which is coaxial with the first mounting hole 15 and is in communication with the first mounting hole 15. The top core 3 is sleeved on the outer wall of the second mounting hole 13 inside the sand box 4 through the first mounting hole 15 inside the top core 3. The top core 3 is slidably mounted in the sand box 4, and the lower end plate 16 of the top core 3 is located on the top of the sand 6 to support the top core 3; when the top core 3 drives the anchor plate 2 to slide in the sand box 4, the purpose of adjusting the anchoring force is achieved. The top core outer wall 14 of the top core 3 is also provided with a scale for observing the fall amount of the top core 3, and the unloading amount can be controlled by controlling the fall amount; in this embodiment, the top core 3 and the sand box 4 are both cylindrical cylinders, and a cavity is also provided inside the top core 3, which can reduce the weight of the top core 3 and reduce the production cost.

[0023] The steel strand 1 passes through the mounting holes in the anchor plate 2, the top core 3 and the sand box 4 in turn and then is inserted into the waist beam 11 to complete the anchoring. A clamping groove is provided on the anchor plate 2, and a clip 17 is provided in the clamping groove. The steel strand 1 is tightened with the anchor plate 2 through the cooperation of the clamping groove and the clip 17.

[0024] A sand outlet hole 7 is provided on one side of the bottom of the sand box 4, and a water inlet hole 9 is provided on the other side. The water inlet hole 9 is provided just above the sand outlet hole 7, and the water inlet hole 9 and the sand outlet hole 7 are symmetrically arranged about the axis of the mounting hole of the sand box 4. A first cap 10 is screwed on the water inlet hole 9, and a second cap 8 is screwed on the sand outlet hole 7. When unloading or dismantling, the second cap 8 needs to be unscrewed to discharge the sand 6 in the sand box 4 through the sand outlet hole 7. When the sand 6 in the sand box 4 becomes less, the top core 3 moves toward the bottom of the sand box 4, and the steel strand 1 relaxes to achieve the purpose of unloading. Water can also be poured into the sand box 4 through the water inlet hole 9 to accelerate the discharge of the sand 6.

[0025] Working principle: When it is necessary to unload the anchor cable or remove the anchor head, the second cap 8 can be opened first to allow the sand 6 to flow out from the sand outlet 7. When the sand 6 is wet, dense, difficult to flow out or flows out too slowly, the vibrating sand box 4 can be struck to speed up the flow of the sand 6, or the sand 6 can be taken out through the sand outlet 7 with a tool.

[0026] If the unloading is incomplete, the unloading amount can be controlled by measuring the fall back of the top core 3. When the unloading reaches the expected value, the second cover 8 at the sand outlet 7 is covered;

[0027] As the sand 6 flows out, the steel strand 1 is completely relaxed, the pulling force of the top core 3 decreases, and when the top core 3 falls back, it pushes the sand in the box out. In order to quickly empty the sand 6 in the sand box 4 body, the first cap 10 can be opened and the water pipe can be connected to the water inlet hole 9, and the remaining sand can be flushed and emptied with water; then knock to push the top core 3 to completely fall back into the sand box 4, and then knock the anchor plate 2 to loosen the anchor plate 2 from the wedge 17, the anchor plate 2 falls back, remove the wedge 17, and take out the anchor plate 2 to complete unloading or removing the anchor.

[0028] In other embodiments of the present invention, the first cap 10 and the water inlet hole 9, and the second cap 8 and the sand outlet hole 7 can be connected by snap connection. For example, wing plates are provided on the outer walls of the water inlet hole 9 and the sand outlet hole 7, and clamping grooves cooperating with the wing plates are provided on the first cap 10 and the second cap 8; they can also be detachably connected by other means, as long as the purpose of sealing and detachable connection can be achieved.

[0029] In other embodiments of the present invention, the top core 3 and the sand box 4 can also be rectangular cylinders or triangular cylinders, and only the top core 3 and the sand box 4 need to be replaced with cylinders of different shapes at the same time.

[0030] In other embodiments of the present invention, several sand outlet holes 7 can be provided in the lower half of the sand box 4 (i.e., the lower half circle after the cylindrical cylinder is divided along the axis), and several water inlet holes 9 corresponding to the sand outlet holes 7 are provided in the upper half of the sand box 4 (i.e., the upper half circle after the cylindrical cylinder is divided along the axis), which can improve the efficiency of sand discharge.

[0031] The above are only the preferred embodiments of the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A non-tensioned cable anchor rapid unloading anchor removal support, characterized in that: It includes a steel strand (1), an anchor plate (2), a top core (3) and a sand box (4); The sand box (4) is arranged on the waist beam (11) and is filled with sand (6) inside. The top core (3) is slidably arranged inside the sand box (4), and the lower end plate (16) of the top core (3) is located on the top of the sand (6). The anchor plate (2) is arranged on the upper end plate of the top core (3). The steel strand (1) sequentially passes through the anchor plate (2), the top core (3), and the installation hole in the sand box (4) and then penetrates into the waist beam (11). The anchor plate (2) is provided with a clamping groove, and a clamping piece (17) is arranged in the clamping groove. The steel strand (1) is tightened with the anchor plate (2) through the cooperation of the clamping groove and the clamping piece (17); One side of the bottom of the sand box (4) is provided with a sand outlet hole (7), and the other side is provided with a water inlet hole (9).

2. The non-tension anchor cable rapid unloading anchor removal support according to claim 1, characterized in that: The bottom surface of the sand box (4) is provided with an anchor backing plate (5), and the sand box (4) is fixedly connected to the waist beam (11) through the anchor backing plate (5).

3. A non-tensioning cable anchor rapid unloading anchor removal support according to claim 1, characterized in that: The water inlet hole (9) is arranged directly above the sand outlet hole (7), and the water inlet hole (9) and the sand outlet hole (7) are symmetrically arranged about the axis of the installation hole of the sand box (4).

4. The non-tension anchor cable rapid unloading anchor removal support according to claim 1, characterized in that: The water inlet hole (9) is provided with a detachable first cap (10).

5. The non-tension cable anchor rapid unloading anchor removal support according to claim 1, characterized in that: The sand outlet hole (7) is provided with a detachable second cap (8).

6. The non-tension anchor cable rapid unloading anchor removal support according to claim 1, characterized in that: A scale for observing the falling amount of the top core (3) is arranged on the outer wall (14) of the top core of the top core (3).

7. A non-tensioned cable anchor quick unloading anchor removal support according to claim 1, characterized in that: The outer wall (14) of the top core of the top core (3) abuts against the inner side of the outer wall (12) of the sand box (4). The top core (3) is sleeved on the outer wall of the second installation hole (13) inside the sand box (4) through the first installation hole (15) inside it, so that the top core (3) is slidably arranged inside the sand box (4).

8. A non-tension anchor cable rapid unloading anchor removal support according to claim 1, characterized in that: A cavity is arranged inside the top core (3).

9. A non-tension cable anchor rapid unloading anchor removal support according to claim 7, characterized in that: The first installation hole (15) and the second installation hole (13) are coaxially arranged.

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