self-propelled inverted arch trestle

Abstract

The invention relates to the field of inverted arch pouring, in particular to a self-propelled inverted arch trestle bridge. Including trestle body, multiple support wheels and multiple anti-hanging wheels, in the length direction of the tunnel, the two ends of the bottom of the trestle are respectively equipped with front outriggers and rear outriggers, the front outriggers are supported on the excavated surface, and the rear outriggers The legs are supported on the unexcavated surface or the inverted arch surface that has been poured. A formwork traction device with liftable legs is provided under the trestle body. The formwork traction device is provided with a connecting part for connecting with the end formwork; The rolling support is between the trestle body and the formwork traction device, and the formwork traction device is suspended below the trestle body through anti-hanging wheels. Through the mutual cooperation between the trestle body and the formwork traction device, this scheme effectively realizes the relative movement of the two, so as to effectively traction and fix the end formwork. The present invention can effectively reduce construction interference between processes, speed up construction progress, and improve quality ,cut costs.

Description

technical field [0001] The invention relates to the field of inverted arch pouring, in particular to a self-propelled inverted arch trestle bridge. 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 face and the...

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 the inverted arch is poured, the end mold of the inverted arch formwork needs to be installed first. The end mold 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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