Distributed tension-compression composite anchor cable

Abstract

The utility model discloses a distributed tension and compression composite anchor cable, and belongs to the technical field of anchor cable reinforcing devices. The anchor cable comprises three bundles of anchor cables, one bundle of anchor cables is composed of seven steel strands, and bearing plates are arranged at the 1 / 4 position, the 1 / 2 position and the 3 / 4 position of each anchor cable respectively and serve as centering supports. By arranging the anchor cables and the bearing plate with different lengths, the original concentrated stress at the end part is reasonably distributed, and the concentrated stress at the end part is transferred to the bearing plate through the casing pipe isolation slurry, so that the pressure and the pulling force act together. According to the distributed tension-compression composite anchor cable, stress dispersion and stress decomposition can be effectively carried out on concentrated stress borne by the anchor cable, the stress condition of the anchor cable can be remarkably improved, the stress concentration damage phenomenon is reduced, the using amount of the anchor cable is reduced, the manufacturing cost can be saved, and safety and environment friendliness are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor cable reinforcement devices, and more specifically to a dispersed tension-compression composite anchor cable. Background Art

[0002] In slope and foundation pit projects, anchor cable reinforcement is very common. Common anchor cable types include pressure anchor cable, tension anchor cable, pressure distribution anchor cable, and tension distribution anchor cable. In engineering practice, construction units often choose the anchor cable type that meets the requirements according to different geological conditions.

[0003] When using anchor cables, first drill holes, then put the prefabricated anchor cables in, inject grout, and apply prestress to the anchor cables after the grout reaches a certain strength. However, the stress of traditional anchor cables will produce significant stress concentration in the anchoring section and progressive damage in the contact parts under compression or tension. How to effectively reduce the stress concentration at the ends of the anchor cables and reasonably distribute the stress has become an inevitable problem in the field of underground engineering reinforcement. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In order to solve the problem of stress concentration at the end of the anchor cable in the existing anchor cable prestressed reinforcement technology, the purpose of the utility model is to provide a decentralized tension-compression composite anchor cable, which can be used in the field of slope and foundation pit engineering reinforcement. By reasonably distributing the stress-bearing parts of the anchor cable, the bonding force and anchoring force of the anchor cable can be significantly increased, and its stress characteristics can be improved.

[0006] 2. Technical solution

[0007] To solve the above problems, the utility model adopts the following technical solutions.

[0008] A distributed tension-compression composite anchor cable comprises three anchor cables, one of which is composed of 7 steel strands. Load-bearing plates are respectively arranged at 1 / 4, 1 / 2 and 3 / 4 of the anchor cables and also serve as centering brackets.

[0009] According to the above features, the bearing plate includes three anchor cable holes and one grouting pipe hole, one end of the bearing plate is connected to a casing, and the anchor cable is wrapped therein; the bearing plate and the anchor cable are connected through an inner clip and are pre-stretched before being placed in the hole.

[0010] In some embodiments, the area of ​​the bearing plate is close to the drilling area of ​​the foundation pit soil to fix the position of the anchor cable.

[0011] According to the above features, the bearing plate is fixed on the anchor cable in four equal parts with equal distances.

[0012] In some embodiments, the bearing plate is provided with holes for grouting pipes to facilitate grouting and removal of the grouting pipes.

[0013] According to the above features, the bearing plate and the anchor cable are tightly connected via an inner clip; the lengths of the anchor cables are different, and the lengths of the anchor cables are differentiated by the position of the bearing plate.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] The utility model relates to a distributed tension-compression composite anchor cable. By setting anchor cables and bearing plates of different lengths, the original concentrated stress at the end is reasonably distributed, and the concentrated stress at the end is transferred to the bearing plate through the casing isolation slurry, so that it is acted upon by pressure and tension. This distributed tension-compression composite anchor cable can effectively disperse and decompose the concentrated stress on the anchor cable, significantly improve the stress condition of the anchor cable, reduce the stress concentration damage phenomenon, and reduce the amount of anchor cable used, which is conducive to saving construction costs, safety and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the distributed tension-compression composite anchor cable provided by the present invention before use;

[0018] Figure 2 This is a schematic diagram of the distributed tension-compression composite anchor cable provided by the present invention after use;

[0019] Figure 3 A top view of the distributed tension-compression composite anchor cable provided by the present invention;

[0020] Figure 4 A top view of the load-bearing plate and the anchor cable provided by the present invention;

[0021] Figure 5 This is a side sectional view of the interaction between the load-bearing plate and the anchor cable provided by the present invention.

[0022] Description of the numbers in the figure:

[0023] 1-anchor cable, 2-grouting pipe, 3-casing, 4-bearing plate, 5-anchor cable hole, 6-grouting pipe hole, 7-inner clip. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0025] Embodiment 1:

[0026] See also Figure 1-5 The utility model relates to a distributed tension-compression composite anchor cable, wherein a bundle of anchor cables 1 is composed of 7 steel strands, with a total of three bundles, and the positions of 1 / 4, 1 / 2, and 3 / 4 of the anchor cables 1 are respectively provided with bearing plates 4 which also serve as centering brackets; the bearing plate 4 includes three anchor cable holes 5 and a grouting pipe hole 6, and one end of the bearing plate 4 is connected with a sleeve 3, and the anchor cable 1 is wrapped therein; the bearing plate 4 is connected to the anchor cable 1 through an inner clip 7, and is pre-stretched before being put into the hole;

[0027] The area of ​​the bearing plate 4 is close to the drilling area of ​​the foundation pit soil, and can also be used as a centering bracket to fix the position of the anchor cable 1 and bear the load; the bearing plate 4 is fixed on the anchor cable 1 in four equal parts and at equal distances to facilitate uniform force distribution;

[0028] The bearing plate 4 is provided with a grouting pipe hole 6 to facilitate grouting and extraction of the grouting pipe 2;

[0029] The bearing plate 4 is tightly connected to the anchor cable 1 via an inner clip 7 ; the lengths of the anchor cables 1 are different, and the lengths of the anchor cables 1 are differentiated by the position of the bearing plate 4 .

[0030] In order to explain the present invention more clearly, the drawings required for use in the implementation mode or the description of the prior art will be briefly introduced below.

[0031] Example

[0032] The positions of 1 / 4, 1 / 2 and 3 / 4 of the tension-compression composite anchor cable 1 are respectively provided with bearing plates 4 which also serve as centering brackets; the bearing plate 4 comprises three anchor cable holes 5 and a grouting pipe hole 6, one end of the bearing plate 4 is connected with a sleeve 3, and the anchor cable 1 is wrapped therein; the bearing plate 4 is connected to the anchor cable 1 through an inner clamp 7, and is pre-stretched before being placed in the hole; the area of ​​the bearing plate 4 is similar to the drilling area of ​​the foundation pit soil, and can also be used as a centering bracket to fix the position of the anchor cable 1 and bear the load; the bearing plate 4 is fixed on the anchor cable 1 in four equal parts and at equal distances to facilitate uniform force distribution; the bearing plate 4 is provided with a grouting pipe hole 6 to facilitate grouting and extraction of the grouting pipe 2; the bearing plate 4 is tightly connected to the anchor cable 1 through the inner clamp 7; the lengths of the anchor cables 1 are different, and the length of the anchor cable 1 is distinguished by the position of the bearing plate 4.

[0033] The specific method of using the utility model comprises the following steps:

[0034] ① First, connect the load-bearing plate 4 and the anchor cable 1 through the inner clip 7, and apply a certain force for pre-stretching;

[0035] ② Connect the casing 3 to the anchor cable 1 to ensure that the slurry and the anchor cable 1 can be effectively isolated;

[0036] ③ Drill holes at designated locations on the slope or foundation pit, and place the anchor cable 1, casing 3 and bearing plate 4 into the holes after the holes have been cleaned and inspected;

[0037] ④ Inject slurry through the grouting pipe 2, and pull out the grouting pipe 2 while grouting until the slurry reaches the specified position;

[0038] ⑤ When the slurry reaches 80% strength, prestress is applied to the anchor cable 1 through the working anchor, clip and jack.

[0039] In summary, the utility model relates to an anchoring device for slope and foundation pit engineering, specifically a distributed tension-compression composite anchor cable. The distributed tension-compression composite anchor cable is composed of a tension anchoring section, a pressure anchoring section and a free forging from bottom to top, wherein a bearing plate 4 serving as a centering bracket is provided at 1 / 4, 1 / 2 and 3 / 4 of the anchor cable 1; one end of the bearing plate 4 is connected to a sleeve 3; the sleeve 3 is sleeved with an anchor cable 1 to isolate the slurry from the anchor cable 1; the bearing plate 4 and the anchor cable 1 are pre-stretched through an inner clamp 7 to ensure the firmness and stability of the position of the anchor cable 1; there are three anchor cable holes 5 and one grouting pipe hole 6 on the bearing plate, through which the anchor cable 1 and the grouting pipe 2 are passed respectively. The distributed tension-compression composite anchor cable can be applied to the field of slope and foundation pit engineering reinforcement, significantly enhancing the reinforcement effect and saving engineering costs.

[0040] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A distributed tension-compression composite anchor cable, comprising an anchor cable (1), characterized in that The anchor cables (1) comprise three bundles in total, one of which is composed of seven steel strands. Load-bearing plates (4) are respectively arranged at 1 / 4, 1 / 2 and 3 / 4 of the anchor cables (1) and also serve as centering brackets.

2. A distributed tension-compression composite anchor cable according to claim 1, characterized in that: The bearing plate (4) comprises three anchor cable holes (5) and one grouting pipe hole (6); one end of the bearing plate (4) is connected to a sleeve (3) and the anchor cable (1) is wrapped therein; The bearing plate (4) is connected to the anchor cable (1) via an inner clip (7) and is pre-stretched before being placed in the hole.

3. A distributed tension-compression composite anchor cable according to claim 1, characterized in that: The area of ​​the bearing plate (4) is close to the drilling area of ​​the foundation pit soil, so as to fix the position of the anchor cable (1).

4. A distributed tension-compression composite anchor cable according to claim 1, characterized in that: The bearing plate (4) is fixed on the anchor cable (1) in four equal parts with equal distances.

5. A distributed tension-compression composite anchor cable according to claim 1, characterized in that: The bearing plate (4) is provided with a grouting pipe hole (6) to facilitate grouting and pulling out of the grouting pipe (2).

6. A distributed tension-compression composite anchor cable according to claim 1, characterized in that: The bearing plate (4) and the anchor cable (1) are tightly connected via an inner clip (7); the lengths of the anchor cables (1) are different, and the lengths of the anchor cables (1) are differentiated according to the position of the bearing plate (4).

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