Movable type shield launching device for narrow and small space

Abstract

A movable type shield launching device for a narrow and small space comprises a launching rack, a reaction frame, horizontal supports and a base ring. The launching rack is fixed to a launching well bottom plate. Lateral longitudinal beams are fixed to the two sides of the launching rack separately. The lateral longitudinal beams on the two sides are each provided with at least one row of positioning bolt holes. The reaction frame is connected with any of the positioning bolt holes in the lateral longitudinal beams on the two sides through bolts, so that the reaction frame is perpendicularly and detachably fixed to the lateral longitudinal beams on the two sides. An irregular-shaped ring plate is fixed to the reaction frame. The base ring is arranged in front of the reaction frame in a spaced mode. The horizontal supports are evenly distributed between the reaction frame and the base ring in the ring direction, and the two ends of each horizontal support are fixed to the irregular-shaped ring plate and the base ring separately, so that the reaction frame, the horizontal supports and the base ring form a whole. According to the movable type shield launching device for the narrow andsmall space, assembly of ring loading pipe segments is not needed, construction cost is reduced, the construction period is shortened, and an enough operation space can be provided for shield materials and soil discharging in the narrow and small space.

Description

Technical field [0001] The invention relates to a device in the technical field of shield tunnel construction, in particular to a mobile shield launching device used for shield launching in a narrow space. Background technique [0002] At present, the shield construction method has occupied a dominant position in tunnel construction fields such as subway tunnels, water diversion tunnels, water supply tunnels, and power tunnels, and has been widely used. Depending on the size of the starting site, the shield can be launched as a whole or split, but no matter which method is used for launching, a device that can provide sufficient reaction force for the tunneling of the shield machine is required. The shield launching device is a shield Prerequisites for the initiation of the structure. [0003] At present, the shield construction widely uses the combination of fixed reaction frame and assembled negative ring segments as the shield starting device. The reaction frame is fixed. Each...

AI Technical Summary

Problems solved by technology

[0004] This kind of shield launching device has certain limitations: (1) A certain number of negative ring segments need to be manufactured, hoisted in and installed, and the negative ring segments need to be removed and hoisted out after the construction is completed, resulting in construction The problem of high cost and long construction period; (2) The assembly of negative ring segments has certain requirements on the size of the site. Although the assembly of negative ring segments can be satisfied in a small site, the limitation of the site makes the construction of negative ring segments There are certain difficulties, and the construction efficiency is greatly reduced; (3) In the narrow site, because the negative ring segment occupies a large space, it affects the lifting and transportation of shield materials and earthwork. Due to space constraints, only The hoist can be used to transport the earthwork, the earthwork transportation volume is 1-2 cubic meters each time, and the lifting times are as many as 17 times, and the efficiency is extremely low

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