Construction method for controlling grouting reinforcement range in large-porosity huge talus loose body

Abstract

The invention discloses a construction method for controlling a grouting reinforcement range in a large-porosity huge talus loose body. The positions of grouting holes of a grouting stop curtain on the periphery of a grouting reinforcement area are measured; a large pipe-following drill machine is adopted to drill the grouting holes of the grouting stop curtain in a jumping mode; a sleeve valve bush shell material is filled; grouting core pipes are inserted, grouting of the grouting stop curtain holes is completed row by row, then a grouting stop curtain wall defining the periphery range of a grouting reinforcement area is formed; the grouting holes in the grouting reinforcement area are drilled row by row in a jumping mode, and after 3 meters of grouting at the bottoms of all the grouting holes is completed, a bottom grouting stop curtain wall of the grouting reinforcement area is formed; the bottom grouting stop curtain wall is crossly closed with the peripheral grouting stop curtain wall, and finally a U-shaped grouting stop curtain controlling the grouting reinforcement range is formed. By forming the U-shaped grouting stop curtain on the periphery of the specific grouting reinforcement area, loss of a large amount of slurry in a common grouting process due to the aerial construction in the talus loose body can be effectively prevented, the construction speed is high, the working efficiency is high, and the overall management cost is low.

Description

technical field [0001] The invention relates to the technical field of grouting reinforcement construction for giant rock heap loose bodies with large porosity, in particular to a construction method of a "U"-shaped grouting curtain used for controlling the grouting reinforcement range of giant rock heap loose bodies with large porosity. Background technique [0002] The scale of rock piles at the entrance of Daqian Shiling Tunnel is extremely large. The range of rock piles covers almost the entire mountain body from the foot of the mountain to the top of the mountain. The rock piles are wedge-shaped with thin upper part and thicker lower part attached to the mountain body. °, the thickness of the rock mound is 26.3-48.4 meters, and the vertical thickness of the rock mound body is as deep as more than 50 meters. The lower part of the rock mound body extends into the river along the mountain. The rock pile is mainly composed of rocks of different sizes and a small amount of s...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that grouting range, grouting amount and grouting reinforcement quality are not easy to control in the grouting reinforcement of the local specific area in the loose body of the large porosity rock pile, thereby providing a method for large porosity. Construction method of "U" type grout-stop curtain controlling grouting reinforcement range in a specific area in giant rock heap loose body

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