Tunnel Strengthening Treatment Method and Supporting Structure Based on Dissolution Cavity Location

Abstract

The invention discloses a tunnel strengthening treatment method and a support structure based on the positions of dissolving cavities. The tunnel strengthening treatment method includes the following steps that firstly, the nearest distance L between the dissolving cavities and a tunnel is determined; secondly, the safety thickness H of a karst region of the tunnel is determined; thirdly, the safety of the tunnel affected by the dissolving cavities of the karst region is judged; and fourthly, different tunnel support structures are adopted according to the safety of the tunnel. The tunnel strengthening treatment method and the support structure based on the positions of the dissolving cavities have the following beneficial effects that firstly, a calculation method is reasonable, consideration is comprehensive, design is reasonable, the construction speed is high, the use effect is good, and different support methods and structures are adopted according to the different safety conditions of the tunnel; and secondly, the corresponding support structures are selected according to the positions of the dissolving cavities, and the construction and safety operation problems of passing of the part, in the karst region, of the tunnel can be effectively solved.

Description

technical field [0001] The invention relates to a tunnel strengthening treatment method and supporting structure based on the location of a dissolved cavity. Background technique [0002] As an important part of road construction and railway construction, mountain tunnels have achieved large-scale development in our country. Many of these tunnels pass through or are adjacent to karst cavities. Although the safety of tunnels passing through karst is highly valued both at home and abroad, such accidents still continue to occur. In particular, the distribution of karst landforms in my country is complex, and the distribution of dissolved cavities is extremely irregular and difficult to detect, causing great harm to the safety of tunnel construction. The existence of water in the dissolved cavity also poses a major safety hazard to the construction of the tunnel. It is of great significance to study the reinforced support structure and treatment methods of tunnels passing throu...

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Problems solved by technology

[0003] Through the search of existing technical literature, it is found that although there are a large number of patent documents on the reinforced support structure and treatment methods of tunnels passing through karst strata, such as the Chinese invention patent application number CN201420783205.7, the name of the invention: a composite type of karst tunnel The support structure, which does not evaluate the safety of karst tunnels and takes targeted measures, and the invention patent application number CN201510490047.5, the name of the invention: a method for calculating the safety thickness of karst tunnels, and the safety thickness method provided by it Based entirely on theoretical calculations, karst tunnels and karst cavities are simplified into a structural mechanics model, and the actual tunnel passing through karst is a stratum structure model, and the calculated results are inconsistent with the actual situation. In addition, there is an invention patent application number CN201120178851.7, the invention Name: Cross-tunnel solution cavity stabilization treatment system, which only considers the transverse tunnel solution cavity, and does not fully consider the tunnel reinforcement support structure and treatment methods of different locations of the solution cavity

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