Shear and pressure pile-anchor structure and its construction method

Abstract

The invention discloses a shear-yielding and pressure-yielding piled anchor structure which comprises a pressure-yielding slide-resistant pile structure and a shear-yielding anchoring structure. The shear-yielding anchoring structure comprises a free section drill hole, and an anchoring section drill hole is formed in the bottom face of the inner side of the free section drill hole; the free section drill hole extends inward to the inner side of a potential slip face of the slope, anchor bars are arranged in the free section drill hole and an anchoring section drill hole, and the outer side ends of the anchor bars extend out of the free section drill hole; mortar fills the anchoring section drill hole, a low compression modulus grouting material fills the free section drill hole, and an anchorage device sleeving each anchor bar is arranged at the outer orifice of the free section drill hole; the pressure-yielding slide-resistant pile structure comprises a slide-resistant pile which extends downward to be located in a stable rock mass below the potential slip face of the slope, a compressive deformation pressure-yielding layer is arranged on the side face wherein the slide-resistant pile is in contact with the slope, and the bottom face of the pressure-yielding layer is aligned to the slip face of the potential slip face of the slope or is located below the potential slip face of the slope. The invention also discloses a construction method of the shear-yielding and pressure-yielding piled anchor structure.

Description

technical field [0001] The invention belongs to the technical field of slope reinforcement in geotechnical engineering, in particular to a yielding shear yielding type pile-anchor structure and a construction method thereof. Background technique [0002] The rock slope whose stratum orientation is consistent with or basically consistent with the orientation of the slope is called bedding rock slope, which is a common and highly unstable rock slope type. When performing slope cutting and excavation on bedding rock slopes, because the rock layer is usually a weak surface, if the inclination angle of the rock layer and the slope angle of the slope meet certain conditions, the slope rock mass is easy to collapse under the action of gravity. Integral or local instability and failure along the rock formation may cause losses or disasters. [0003] In order to avoid the instability and failure of bedding rock slope, it is very necessary to take reasonable support and reinforcement...

AI Technical Summary

Problems solved by technology

In terms of this construction technology, since part of the slope cutting and excavation construction has been carried out before the implementation of the pre-reinforcement structure, it cannot be regarded as a real pre-reinforcement technology. In addition, the slope cutting and excavation construction is divided into two stages Implementation is obviously uneconomical and inconvenient for construction organization

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