Traction fixing method for inverted arch formwork

Abstract

The invention relates to the field of inverted arch pouring, and particularly relates to a traction fixing method for an inverted arch formwork. The traction fixing method comprises the following steps that firstly, supporting legs at the two ends of a trestle are supported on the ground on the two sides of a to-be-poured inverted arch correspondingly, a liftable formwork traction part is hung below the trestle through reverse hanging wheels, and an end formwork is arranged on a primary support of the to-be-poured inverted arch; secondly, grouting is conducted in the end formwork, and concreteis cured to reach the design strength; thirdly, the trestle is made to move above the formwork traction part in the advancing direction of a tunnel through a driving part and supporting wheels arranged between the trestle and the formwork traction part, and the trestle is lowered through the formwork traction part; and fourthly, the formwork traction part is made to move in the advancing direction of the tunnel through the driving part. According to the scheme, through mutual cooperation of a trestle body and the formwork traction part, relative movement of the trestle body and the formwork traction part is effectively achieved, and thus the end formwork is effectively pulled and fixed; and construction interference between the procedures can be effectively reduced, the construction progress is accelerated, the quality is improved, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of inverted arch pouring, in particular to a method for pulling and fixing an inverted arch formwork. Background technique [0002] The inverted arch is a reverse arched structure set at the bottom of the tunnel to improve the stress conditions of the upper support structure. It is one of the main components of the tunnel structure. The load on the road surface can be effectively transmitted to the ground, and it can also effectively resist the reaction force from the lower layer of the tunnel. The inverted arch and the secondary lining constitute the tunnel as a whole, increasing the structural stability. [0003] During the construction of the inverted arch, it will interfere with other processes, so it is necessary to use the inverted arch trestle bridge during the construction of the inverted arch. The use of the inverted arch trestle can reduce the interference between the excavation construction of the tunnel ...

AI Technical Summary

Problems solved by technology

[0004] When a new inverted arch needs to be poured, it is necessary to dismantle and move the trestle above the poured inverted arch and install it above the inverted arch to be poured. This process is cumbersome and will affect the construction period to a certain extent

[0005] Before pouring the inverted arch, it is necessary to install the inverted arch formwork, namely the end formwork. The end formwork generally includes an end plate and two side plates. The side plates are located on both sides of the inverted arch, while the end plates are located at the end of the inverted arch. A C-shaped structure can be formed between the plate and the end plate. After the pouring of the inverted arch is completed, the end formwork needs to be pulled as a whole to make the side plate move to the inverted arch to be poured corresponding to the poured arch. This process generally needs to install traction equipment in front of the end plate, and then disassemble it after the traction is completed, and the process is relatively cumbersome

[0006] The construction progress of the inverted arch lining cannot be consistent with the progress of the tunnel face within a safe step distance, and the interference between the construction of the inverted arch and the excavation of the excavated slag from the tunnel face greatly affects the efficiency and safety of tunnel construction. Especially when the tunnel construction schedule is tight, the interference problem is more prominent

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