Embedding type anchoring device and anchoring method for pre-stressed anchor cable

Abstract

The invention discloses an embedding type anchoring device for a pre-stressed anchor cable. The embedding type anchoring device comprises a strengthening structure connected with a soil blocking structure steel bar framework. The strengthening structure is provided with anchor supports. The anchor supports are provided with steel strand holes. According to the device, the anchor cable and soil blocking structures are directly connected. An anchoring method comprises the following specific steps that firstly, the soil blocking structure steel bar framework is manufactured, and the embedding type anchoring device for the pre-stressed anchor cable is fixed to the soil blocking structure steel bar framework; secondly, the soil blocking structure steel bar framework is hung in a preformed soil blocking structural hole, and concrete is poured in the soil blocking structure steel bar framework so as to form the multiple soil blocking structures; thirdly, after the concrete of the soil blocking structures is solidified, a concrete protection layer at the anchor supports is chiseled at the anchor cable elevation position to expose the steel strand holes; and fourthly, the free end of a steel strand of the anchor cable penetrates the steel strand holes, and tensioning and locking are achieved through an anchor. According to the method, construction is convenient, and the falling risk of the anchoring structure is avoided.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering prevention and control, and relates to a prestressed anchor cable embedded anchoring device, and also relates to an anchoring method for an anchor-pull retaining structure using the device. Background technique [0002] The anchor-stayed retaining structure composed of prestressed anchor cables and concrete piles, columns, and slab retaining structures is widely used in the fields of geotechnical engineering prevention and control such as high slope prevention and deep foundation pit support. The traditional force transmission method between the anchor cable and the retaining structure is mostly the beam force transmission method, that is, a steel waist beam or a concrete waist beam is set between piles or columns, and the anchoring force of the anchor cable is transmitted to the retaining structure through the waist beam, so as to ensure The retaining structure and slope are stab...

AI Technical Summary

Problems solved by technology

[0004] 1. Waist beams are installed on the retaining structure, especially steel waist beams. Due to the construction deviation of the retaining structure, the center lines are not on the same plane, so after the waist beams are erected, they cannot be in effective contact with part of the retaining structure, resulting in Partial or global damage occurs due to uneven stress on anchor cables and waist beams

[0005] 2. Waist girders are installed on the retaining structure, which needs to occupy a certain construction width. The conventional steel girder is about 400mm, and the concrete girder is even larger, which will increase the amount of earthwork excavation and backfilling

[0006] 3. External beams or other types of existing anchor structures are not easy to fix, the construction deviation is large, and a lot of manpower and material resources are invested, and there is a risk of falling during construction and use

[0007] 4. The beam force transmission method requires the waist beam to transmit the anchoring force of the anchor cable to the support structure, which increases the force transmission path, and the force transmission is not direct

[0008] 5. Waist beams are set on the support structure, especially steel waist beams, which are exposed for a long time and are easy to rust, resulting in large stress loss

[0009] 6. In the foundation pit and slope engineering with irregular sidelines (such as arc and curved sidelines), the application of external waist beams is limited and even difficult to use

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