Movable reaction equipment for shield launching shaft

Abstract

Movable reaction equipment for a shield launching shaft comprises a girder provided with a rectangular frame, wherein the girder is perpendicularly placed on a track of a launching bracket in the shield launching shaft, and the front side of the girder is connected with a reference steel ring through welding, the back side of the girder is connected with a flange at the front end of a horizontal support tube, a flange at the back end of the horizontal support tube is closely attached to a pushing back wall of the shield launching shaft, the horizontal support tube is formed by flanged connection of one section of steel tube or at least two sections of steel tubes, and the length of each steel tube is smaller than the travel of a shield machine jack; and the front side of an embedded support piece on a bottom plate of the shield launching shaft is in threaded connection with the tail of an anti-reverse jack. The equipment is low in construction cost, simple and convenient to construct, high in construction efficiency, short in construction period and low in risk when being used for performing launching construction of the shield launching shaft.

Description

technical field [0001] The invention relates to a movable counterforce device in a shield launching shaft Background technique [0002] As an advanced tunnel construction method, "shield tunneling method" has the advantages of high degree of mechanical automation, fast construction speed, small ground disturbance, no interference with road traffic, and small impact on the surface environment. At present, it has been recognized in the field of tunnel engineering in my country Widely used, the proportion of shield tunnels in my country's transportation field will increase in the future. [0003] The first work to be carried out in the construction of a tunnel using the shield method is the initial construction of the shield machine. If the initial construction of the shield machine is not carried out in the station, it is usually necessary to construct a shaft for the initial launch of the shield machine, and then hoist the shield machine into it. The originating construction ...

AI Technical Summary

Problems solved by technology

[0005] The above shield tunneling construction method in the vertical shaft has the following disadvantages: (1), a certain number of negative ring segments need to be manufactured, hoisted in and installed, and after the construction is completed, the negative ring segments need to be dismantled and hoisted out of the initial shaft; Outside the well, the construction cost is high, the process is many, the risk is high, and the construction period is increased

At the same time, the assembly operation of the negative ring segment also requires a relatively large origin shaft clearance, which also increases the construction cost and construction period

(2) The stressed steel pipes in the supporting part of the fixed reaction frame need to be welded and dismantled, which is cumbersome to operate and increases the construction cost and construction period

(3) The oblique support method of the reaction frame requires greater support force, and requires high pipe diameter and welding requirements for the stressed steel pipe, which also increases the construction cost and construction difficulty

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