Anchoring device of slope body with cavity and construction method thereof

Abstract

The invention relates to an anchoring device of a slope body with a cavity and a construction method thereof. The anchoring device comprises an umbrella-shaped anchoring head (7), an anchoring rope (4) and a meshing chain (6) which links the umbrella-shaped anchoring head and the anchoring rope (4); a waterproof umbrella-shaped surface (19) in the umbrella-shaped anchoring head is used for injecting in mortar after the cavity (2) is braced by an umbrella-shaped skeleton to form a mortar expanding head in the wrapping range of the waterproof umbrella-shaped surface; the meshing chain (6) can mesh to form a straight line under the condition of compression and has certain anti-bending rigidity, and the chain can extend to be a normal chain shape after the meshing chain is subjected to tensioning impact. By means of the anchoring device and the method, the problem of easy breaking of the anchoring rope caused by nonuniform force bearing of an internal bending point and an external bendingpoint of the anchoring rope at a bending point is effectively solved; the construction of the expanding head is not influenced by excessively large cavity volume and weird shape, the practicability ishigh, and sufficient anchoring force can be provided for the anchoring rope when the anchoring rope enters a working state, sufficient anchoring force can be provided for the anchoring rope by needing small amount of mortar, and resources are saved.

Description

technical field [0001] The invention relates to the technical field of rock-soil anchoring in slope support, in particular to an anchoring device and a construction method thereof under the condition that a cavity exists in a slope body. Background technique [0002] In slope support engineering, prestressed anchor cables are often used in combination with various supporting structures, such as frame prestressed anchor cable support structures, anchor-pulled pile-sheet wall support structures, and prestressed anchor cable composite soil nail walls. support structure. The prestressed anchor cable can transfer the backside earth pressure of the slope soil to the slope support structure to the deep soil of the slope, so as to use the anchoring force of the deep soil to reinforce the slope. [0003] Usually, the anchoring force provided by the anchoring action is related to the diameter of the anchor and the length of the anchor. If there is a cavity in the mountain within the ...

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Problems solved by technology

[0004] (1) Enlarging the anchor hole diameter, filling the cavity with low-grade concrete, and drilling again when the concrete strength reaches 80%, this kind of measure often consumes a lot of manpower and material resources, and greatly wastes resources

[0005] (2) Penetrate the PVC pipe according to the existing anchor hole, pass the PVC pipe through the cavity area, touch the bottom to the edge of the cavity, and drill again until the designed anchoring length is met. When the volume is large, there is basically no possibility of implementation

[0006] (3) Change the design or change the angle of the anchor cable, the volume and relative position of the cavity cannot be accurately determined, and a lot of manpower and material resources are wasted in half of the support project construction to change the design

[0007] It can be seen that none of the above-mentioned measures can solve the problem that the anchorage section of the anchor cable cannot provide sufficient anchoring force, and consume a lot of manpower and material resources, and the implementability is poor.

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