Boot last base comb-type tunnel bottom lining structure and drainage system thereof

Abstract

The invention discloses a boot last base comb-type tunnel bottom lining structure and a drainage system thereof. The effect of underground water on a tunnel lining bottom structure is reduced or eveneliminated, the problem of karst or underground water development region tunnel inverted arch floating deformation or tunnel bottom structure cracking and damage is solved, and the tunnel constructionand operation stability and safety are ensured. The bottoms of side walls on the two sides of an arch wall secondary lining structure are provided with bases fixedly connected with the arch wall secondary lining structure, the bases are adopted as bearing structures of the arch wall secondary lining structure, and a longitudinal-through boot inner cavity inside the structure is adopted as a tunnel longitudinal drainage channel. A comb-type tunnel bottom structure with the two transverse sides in weak connection with the bases are arranged between the boot-shaped bases on the two sides, a paving bottom layer is arranged on the comb-type tunnel bottom structure, the lower portion of the comb-type tunnel bottom structure is provided with a transversely-spaced and longitudinal-through lower cavity as a tunnel bottom underground water longitudinal drainage channel. The arch wall range drainage system is communicated with the boot inner cavity, the tunnel bottom drainage system is communicated with the lower cavity, and a ballast bed accumulated water drainage system is communicated with the boot inner cavity and the lower cavity.

Description

technical field [0001] The invention relates to a tunnel lining and drainage system structure, in particular to a tunnel lining and its waterproof and drainage system structure used in areas where groundwater develops, areas where groundwater is irregularly affected by seasons, or karst areas. Background technique [0002] Since the beginning of the 21st century, my country's railway construction has developed rapidly, and more and more high-standard double-track railways with a speed of more than 200km per hour have been built. Especially in the southwestern mountainous area, on the one hand, due to the widespread distribution of limestone formations; on the other hand, for high-speed railways, the line development is restricted by various factors such as large curve radius and complex terrain and geological conditions, resulting in the scale (number and length) of karst tunnels. Rapid increase. Due to the complexity, diversity, and irregularity of karst and karst water de...

AI Technical Summary

Problems solved by technology

[0020] The technical problem to be solved by the present invention is to provide a shoe-shaped base comb-shaped tunnel bottom lining structure and its drainage system. Through the transformation of the traditional tunnel lining tunnel bottom structure, the force-bearing form and drainage system of the tunnel bottom structure are changed to achieve Reduce or even eliminate the effect of groundwater on the bottom structure of the tunnel lining, effectively solve the problems of uplift deformation of the tunnel arch or cracking and damage of the tunnel bottom structure in karst or groundwater-developed areas, and ensure the stability and safety of tunnel construction and operation

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