Grouting support anchor cable equipment for impact of drift ice on water diversion tunnel in cold and arid regions

Abstract

The invention discloses a grouting support anchor cable device for the impact of drifting ice on a water diversion tunnel in cold and arid regions, comprising an outer pipe, wherein an inner pipe is movably arranged through the two ends of the outer pipe, and the outer wall of the inner pipe is connected with the inner pipe of the outer pipe. There is a gap between the walls, one end of the inner tube is fixed with a drill bit with a maximum diameter larger than the outer tube, the other end of the inner tube is fixed with a connecting plate that can be connected to the support body, and the outer tube is fixed at one end close to the drill bit Compared with the prior art, the concrete column formed by the anchor cable grouting of the present invention is only subjected to tension and spring buffering. Pressure, not subject to impact force, to prevent the concrete column from cracking and failing in repeated collisions.

Description

technical field [0001] The invention relates to the technical field of tunnel support fittings, in particular to a grouting support anchor cable device for the impact of drift ice on water diversion in cold and arid regions. Background technique [0002] The water diversion tunnel is an underground water conveying structure connecting the shore-type pressurized water inlet of the hydropower station and the surge chamber (or the pressure pipeline of the hydropower station without a surge chamber). In order to prevent rock collapse and water seepage, the tunnel body is usually supported by grouting anchor cable guard plate structure. Under normal circumstances, the concrete formed by anchor cables and grouting provides constant support force from the soil layer to the support plate, but in cold and arid regions, due to the influence of drift ice, the drift ice will produce impact force on the support plate, while Due to the poor axial impact resistance of the anchor cable con...

AI Technical Summary

Problems solved by technology

Normally, the anchor cable and the concrete formed by grouting provide a constant support force from the soil layer to the support plate, but in the cold and arid region, due to the influence of drift ice, the drift ice will have an impact force on the support plate, while Due to the poor axial impact resistance of the anchor cable concrete column, cracks are prone to occur in the long run, resulting in the failure of the anchor cable and the risk of tunnel collapse

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