Tunnel second lining remediation method for die cast construction of lining

Abstract

The invention discloses a tunnel second lining remediation method for die cast construction of a lining. The method includes the following steps that firstly, a structural steel arch frame is mounted;secondly, hair cutting treatment is carried out on the inner wall of a tunnel second lining; thirdly, an arched steel bar structure is constructed; and fourthly, die cast construction is conducted onthe concrete lining, die cast construction is carried out on the concrete lining in the longitudinal extension direction of a tunnel from back to front, and the concrete lining is divided into a plurality of lining sections from back to front. According to the method, the design is reasonable, the construction is simple and convenient, the use effect is good, an arched template for carrying out molding construction on a construction lining is formed by splicing seven lining molding templates, meanwhile, assembled scaffolds are adopted, and subsection pouring is carried out on the constructionlining from bottom to top through the arched template; the adopted assembled scaffolds are disassembled and assembled on site simply and conveniently, and the construction efficiency of the lining can be effectively increased; and at the same time, a vault pouring section of the construction lining is poured through a vault pouring structure to ensure the concrete compactness and molding qualityof the vault pouring section, and the secondary remediation effect of the tunnel is ensured.

Description

technical field [0001] The invention belongs to the technical field of tunnel secondary lining renovation construction, and in particular relates to a tunnel secondary lining renovation method for lining mold construction. Background technique [0002] With the continuous development of high-speed railways, single-hole and double-track tunnels that pass through complex geological conditions are becoming more and more common, and the number of tunnel defects that they face is also increasing. The upper part of the lining concrete is voided and the steel frame is twisted and deformed, which further increases the risk of collapse and seriously threatens driving safety. Karst geology is mainly the result of chemical dissolution and mechanical damage to soluble rock formations due to runoff, recharge, infiltration and circulation of surface water and groundwater. After the construction of the tunnel passing through the karst strata (that is, the karst strata tunnel) is completed...

AI Technical Summary

Problems solved by technology

However, when renovating the secondary lining of the tunnel passing through the karst stratum, due to the characteristics of rich water, karst caves, faults, high ground stress, dangerous rockfall, and bedding bias in the stratum where the cave body is located, it is only constructed in the secondary lining of the tunnel Concrete lining cannot be used as a substrate to solve the disease of the second lining of the tunnel, and it cannot effectively control the disease of the hollow and cracked section of the second lining of the tunnel

Moreover, currently, when lining is used to remediate the secondary lining disease of tunnels in karst strata under complex geological conditions, there is no set of unified, standard and standardized construction methods to follow. In actual construction, it is inevitable that the construction operation is relatively random, There are many problems such as low construction efficiency and the quality of the formed bushing cannot be guaranteed.

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