Tunnel second liner concrete longitudinal dispersion grouting device and construction method thereof

Abstract

The invention discloses a tunnel second liner concrete longitudinal dispersion grouting device and a construction method thereof. The tunnel second liner concrete longitudinal dispersion grouting device includes a travelling trolley, a grout transportation mechanism connected with the travelling trolley and a longitudinal displacement grouting mechanism arranged on the travelling trolley; the longitudinal displacement grouting mechanism includes a longitudinal displacement dolly, a clamping regulation assembly located on the longitudinal displacement dolly and a grouting spray pipe connected to the clamping regulation assembly, and a grouting gun barrel is connected with the grout transportation mechanism. According to the tunnel second liner concrete longitudinal dispersion grouting device, a retrusive concrete continuous transportation and grouting mode is adopted to conduct continuous retreating for grouting; by matching transportation pressure of a concrete pump, a spillover diffusion effect and a gravity field in the grout transportation mechanism, dispersed and continuous grouting is conducted on the front end and the two sides, the tunnel second liner concrete longitudinal dispersion grouting device is reliable in structure and convenient to construct, the grouting quality of a tunnel second liner can be greatly improved, the grouting thickness of a second liner is ensured, and tunnel structure with the even tunnel thickness is formed.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a longitudinally dispersed pouring device for secondary lining concrete of a tunnel and a construction method thereof. Background technique [0002] At present, all kinds of tunnels constructed by drilling and blasting method in China have generally been constructed by the overall mobile tunnel mold building trolley. It is a ring structure, and adopts radial upward concrete delivery and pouring of the second lining concrete method. Due to the limitation of the distance and height of the pouring points, the concrete is limited by gravity and the slump of the concrete itself, which will inevitably cause the concrete to be difficult to overcome when pouring. Insufficient gravity and flow dispersibility are difficult, forming a conical accumulation in the range of slump radius around the pouring point, and forming an area far away from the pouring port where the concrete c...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a tunnel secondary lining concrete longitudinal dispersion pouring device and its construction method to solve the problems of insufficient pouring thickness at the back of the existing tunnel lining and quality defects of the back of the secondary lining.

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