Construction method for tensile type bond-free pre-stressed anchor cable

Abstract

The invention relates to a building construction method, in particular to a construction method for a tensile type bond-free pre-stressed anchor cable used for high-slope support engineering in water-power engineering. After the construction method for the tensile type bond-free pre-stressed anchor cable is adopted, frictional resistance on the shearing surface of an instable mountain and a stable mountain is increased through a bond-free pre-stressed anchor cable deep support, and meanwhile acting force of slope sliding is resisted; the instable mountain and the stable mountain are firmly combined into a whole, the stability of a slope is improved, a structural fracture is prevented from further developing, and the purposes of protection and firmness are achieved; late-period slope safety monitoring data show that the high slope of a plunge pool basically tends to be stable. Meanwhile, through the bond-free pre-stressed anchor cable support, the self-weight of the structure is greatly reduced, engineering materials are reduced, engineering safety and stability are ensured, and the construction method has remarkable economic benefits and social benefits.

Description

technical field [0001] The invention relates to a building construction method, in particular to a construction method for a tension type non-adhesive prestressed anchor cable used in a high side slope support project in a hydropower project. Background technique [0002] The exit of the open spillway of the hydropower station is provided with a deflector nose sill and a stilling pond, and the water flow is deflected into the stilling pond for energy dissipation. The vertical and horizontal sections of the stilling pond are all trapezoidal sections. One side of the stilling pond is a permanent high slope, and the maximum height of the slope excavation can reach more than 200 meters. Moreover, the engineering geology and hydrogeological conditions of the hydropower station are relatively complicated. The slope excavation and The scale and difficulty of reinforcement treatment are relatively large. Shallow support and deep support are used in slope reinforcement treatment. Sin...

AI Technical Summary

Problems solved by technology

The vertical and horizontal sections of the stilling pond are all trapezoidal sections. One side of the stilling pond is a permanent high slope, and the maximum height of the slope excavation can reach more than 200 meters. Moreover, the engineering geology and hydrogeological conditions of the hydropower station are relatively complicated. The slope excavation and The scale and difficulty of reinforcement treatment are relatively large. Shallow support and deep support are used in slope reinforcement treatment. Since the prestressed anchor cable is fast and effective and has the characteristics of little disturbance to the slope, the current construction method is not up to the standard. To meet the requirements, the application of prestressed anchor cables has been greatly restricted, especially for deep support, and the support effect after construction is poor