Combined arched tunnel lining of inversely truncated-cone-shaped hollow tunnel bottom and drainage system structure thereof

Abstract

The invention discloses a combined arched tunnel lining of an inversely truncated-cone-shaped hollow tunnel bottom and a drainage system structure thereof in order to reduce and even eliminate the effect of underground water on the bottom structure of the tunnel lining, effectively solve the problems that tunnels in karst or underground water development areas inversely arch, come up and deform ortunnel bottom structures are cracked and damaged, and ensure the stability and safety of construction and operation of the tunnels. Tunnel bottom construction bodies are arranged below the bottoms oftwo side walls of an arch-wall secondary lining structure to serve as a bearing structure; each tunnel bottom construction body is of an inversely truncated-cone-shaped hollow structure and is formedby integrally pouring upper bottom plates, transverse webs at two sides, lower bottom plates and longitudinal webs, and tunnel bottom cavities are formed longitudinally at intervals in the tunnel bottom construction bodies, wherein the lower bottom plates and the longitudinal webs are arranged longitudinally at intervals. Central water ditches which are longitudinally communicated are formed along the longitudinal centers of the lower brims of the plate surfaces and communicated with all the tunnel bottom cavities. The drainage system includes a drainage system communicated with the tunnel bottom cavities within an arched-wall range, a tunnel bottom drainage system and an in-tunnel drainage system.

Description

technical field [0001] The invention relates to a tunnel lining and a drainage system structure, in particular to a tunnel lining and its waterproof and drainage system structure used in areas with developed groundwater 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 southwest mountainous area, karst is developed, and the development of the line is subject to many factors such as large curve radius and complex topographic and geological conditions. Restricted by these factors, the scale of karst tunnels increased rapidly. Due to the complexity, diversity, and irregularity of karst and karst water development, the risks of building large karst tunnels, especially their operation, are getting higher and higher. [0003] In recent years, during the operati...

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Problems solved by technology

[0020] The technical problem to be solved by the present invention is to provide a composite arched tunnel lining and its drainage system structure at the bottom of a hollow downturned tunnel, so as to reduce or even eliminate the effect of groundwater on the bottom structure of the tunnel lining, and effectively solve the problem of tunnel elevation in karst or groundwater-developed areas. Arch uplift deformation or tunnel bottom structure cracking damage to ensure the stability and safety of tunnel construction and operation

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