Advanced reinforcement construction method for constructing tunnel in stratum without self-stabilizing capability

Abstract

The invention relates to an advanced reinforcement construction method for constructing a tunnel in a stratum without self-stabilizing capability. The advanced reinforcement construction method comprises the steps that a vault is manufactured along a vault boundary line at the position of a hole opening, wherein the consolidated vault is formed by a plurality of horizontal jet grouting piles I which mesh with each other in the diameter direction; a plurality of evenly distributed horizontal rotary jet grouting piles II are manufactured on upward slopes of other hole openings except the hole opening positions, and a plurality of evenly distributed horizontal rotary jet grouting piles III are arranged along the inner wall of hole bodies, and the tunnel is reinforced by a method combining thehorizontal rotary jet grouting piles and advance grouting conduits, so that tunnel diseases such as collapse, cracking and rheology are effectively prevented, the construction cost for construction of temporary inverted arches and the later period is reduced, the construction speed is improved, the construction period is shortened, and meanwhile, the safety of the total construction period and the later period of operation of a project is ensured, the practicability is high, and the advanced reinforcement construction method is worthy of popularization.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to an advance reinforcement construction method for constructing a tunnel in a stratum without self-stabilization ability. Background technique [0002] There is an old saying: "If you want to get rich, build roads first", which reveals the direct impact relationship between economic development and traffic level. At present, with the increasing economic level and the development needs of traffic, the roads connecting the north and the south of the river Bridge engineering is also developing rapidly, and new technologies are constantly emerging. Among them, there are also many tunnel projects with small clear distances constructed in the mountains in order to shorten the distance. If it is reasonable, there will be tunnel diseases such as collapse, cracking and rheology, which will affect the construction speed and construction period, and even endanger life s...

AI Technical Summary

Problems solved by technology

[0002] There is an old saying: "If you want to get rich, build roads first", which reveals the direct impact relationship between economic development and traffic level. At present, with the increasing economic level and the development needs of traffic, the roads connecting the north and the south of the river Bridge engineering is also developing rapidly, and new technologies are constantly emerging. Among them, there are also many tunnel projects with small clear distances constructed in the mountains in order to shorten the distance. Reasonable, there will be tunnel defects such as collapse, cracking and rheology, which will affect the construction speed and construction period, and even endanger life safety in serious cases, causing major economic losses

This kind of phenomenon is most obvious in strata without self-stabilization ability such as saturated fine sand layer, such as Shangbai Tunnel of Daxi Railway, Liangshan Tunnel of Xiamen-Shenzhen Railway, etc. The traditional single grouting reinforcement has been difficult to solve the technical problem of easy collapse

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