Tunnel center drainage ditch formwork assembly, drainage ditch structure and construction method of tunnel center drainage ditch formwork assembly

Abstract

The invention relates to a tunnel center drainage ditch formwork assembly, a drainage ditch structure and a construction method of the tunnel center drainage ditch formwork assembly. The tunnel centerdrainage ditch formwork assembly is characterized in that an outer formwork placed in a tunnel base plate pouring space is poured to form a drainage ditch construction space, and the formed drainageditch construction space comprises a main body space and a side space communicating with the main body space; an inner formwork is placed in the main body space, the main body space and the side spaceare separated by the inner formwork, pouring is carried out in the main body space to form a main body structure, a drain ditch is formed inside the main body structure, and the side space can be poured to form a water permeable structure; and a preset flow guide pipe is placed in a main pouring space, and drainage holes which enable the water permeable structure to communicate with the drainageditch are formed. According to the tunnel center drainage ditch formwork assembly, the drainage ditch structure and the construction method of the tunnel center drainage ditch formwork assembly, the problems of single pouring material of the drainage ditch and easy leakage of a joint of the drainage ditch are effectively solved, so that parts, made of different materials, of the drainage ditch have different performances, water leaking from the joint is merged into the drainage ditch through the permeable structure, and the tunnel drainage requirements under complex conditions are met.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a formwork assembly of a drainage ditch in the center of a tunnel, a drainage ditch structure and a construction method thereof. Background technique [0002] Since most of the tunnel projects are built in the underground rock formation, the entire tunnel structure may be surrounded by groundwater, and the groundwater is pervasive. Often, due to insufficient site exploration in the early stage and inadequate work in design and construction, etc., the tunnel waterproof and drainage system will be damaged. Defects, thus causing water leakage in tunnels, and water leakage has become one of the main problems affecting road tunnels in our country, and is an important factor affecting the normal operation and service life of road tunnels. [0003] The central drainage ditch of the highway tunnel runs through the entire tunnel longitudinally, and is a key link in the water collection ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of the prior art, provide a tunnel center drainage ditch formwork assembly, a drainage ditch structure and its construction method, solve the problem of easy leakage at the interface of the drainage ditch, and use the method of layered pouring to make the drainage ditch The ditch body is composed of two different materials, so that the parts made of different materials of the drainage ditch have different performances, meet the tunnel drainage requirements under complex conditions, improve the overall construction efficiency, and meet the construction requirements of short construction period and high quality

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