Dual-hole hollow rectangular section bearing cutting type arched tunnel lining structure and separation drainage system

Abstract

The invention discloses a dual-hole hollow rectangular section bearing cutting type arched tunnel lining structure and a separation drainage system. The effect of underground water on a tunnel liningbottom structure is eliminated, the problem that at a karst or underground development region, a tunnel inverted arch floats and deforms or a tunnel bottom structure is cracked and broken is effectively solved, the tunnel construction and operation stability and safety are ensured, and the phenomenon that ballast bed accumulated water inside a tunnel pollutes underground water during operation isavoided. Longitudinal beams fixedly connected to an arch wall secondary lining structure are arranged at the bottoms of the two side walls of the arch wall secondary lining structure, and each longitudinal beam is of a rectangular section with an upper longitudinal cavity and a lower longitudinal cavity. The longitudinal beams are adopted as bearing structures for an arch wall preliminary supporting structure and the arch wall secondary lining structure and also adopted as a tunnel longitudinal drainage channel. A replacement filling foundation composed of a foundation surface layer and a foundation bottom layer is arranged at the portion, between the longitudinal beams, of the bottom of the tunnel. An in-vivo excretory system introduces ballast bed accumulated water inside the tunnel intothe upper longitudinal cavities, and an in-vitro excretory system introduces water catchment of an arch wall range drainage system and a tunnel bottom drainage system into the lower longitudinal cavities.

Description

technical field [0001] The present invention relates to tunnel lining and drainage system structure, in particular to a tunnel lining structure and its waterproof and drainage system structure applied to groundwater development areas or areas where groundwater is affected by seasons irregularly 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 have been constructed with a speed of over 200km / h. Especially in the southwestern mountainous area, on the one hand, due to the widespread distribution of limestone strata; on the other hand, for high-speed railways, the line extension is restricted by various factors such as large curve radius and complex topographic 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 ...

AI Technical Summary

Problems solved by technology

[0020] The technical problem to be solved by the present invention is to provide a double-hole hollow rectangular cross-section beam bearing cutting-type arched tunnel lining structure and a separate drainage system. By transforming the traditional tunnel lining structure and drainage system, the tunnel bottom The structural stress form and drainage system can eliminate the effect of groundwater on the bottom structure of the tunnel lining, and effectively solve the problems of uplift deformation of tunnel arches or cracking and damage of tunnel bottom structures in karst or groundwater-developed areas, ensuring the stability and safety of tunnel construction and operation. And prevent groundwater from being polluted by accumulated water in the ballast bed of the tunnel during operation

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