Concrete construction method for tunnel secondary lining vault

Abstract

The invention provides a concrete construction method for a tunnel secondary lining vault, and relates to the technical field of tunnel construction. The concrete construction method for the tunnel secondary lining vault comprises the following steps that step 1, each section of pipe body in a telescopic pipe relatively extends outwards to be opened, then the telescopic pipe penetrates through a preformed hole in a vault template to be inserted into the vault template, and the section of pipe body which is communicated with a hose and is positioned at the tail end is in a state of penetratingthrough the preformed hole in the vault template; step 2, a concrete conveying device is started, so that concrete passes through the hose and then enters the telescopic pipe. Due to the fact that thepositions of discharging ports of the pipe bodies can be controlled only by controlling starting of a first motor, the vault formwork can be more evenly filled with concrete discharged by the pipe bodies, and compared with the situation in the prior art that a spliced concrete conveying pipe needs to be frequently detached to change the pouring position of the concrete, operation is more convenient. The construction efficiency is further improved.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a concrete construction method for the second lining vault of the tunnel. Background technique [0002] The construction method of the secondary lining of the tunnel generally uses a lining trolley and is equipped with a concrete delivery pump for pouring. In the prior art, the commonly used method for pouring concrete into the vault of the second lining of the tunnel is to open holes in the formwork of the vault with a distance of about 3 meters. Insert the nozzle of the concrete pump delivery pipe directly from the opening, and pour concrete from the inside out. After the pouring is completed, install the nozzle of the concrete pump delivery pipe on the head formwork, and rely on the pressure of the concrete pump to squeeze the concrete to the end of the pipe. the other end of the mouth. This kind of pouring process, due to the long pouring distance (about 10 mete...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a concrete construction method for the second-lined vault of the tunnel, aiming at solving the problem that the concrete delivery pipe of the end formwork will withdraw from the concrete construction method of the tunnel second-lined vault in the prior art when pouring concrete Only when the steel pipe is removed can the concrete be poured continuously, which not only affects the pouring efficiency, but also is very cumbersome for the construction workers, which increases the labor intensity of the construction workers

Images