Door sealing structure used in shield starting and receiving construction and construction method of structure

Abstract

The invention discloses a door sealing structure used in shield starting and receiving construction and a construction method of the structure. An underground continuous wall consists of a steel reinforcement cage which is embedded in concrete as a framework; a bottom steel plate is transversely welded to the bottom of a shield circular through area corresponding to the steel reinforcing cage; twoside steel plates with the same size as the bottom steel plate are vertically welded on the left and right sides of the bottom steel plate respectively to form a square upper opening steel moulding plate; a vertical steel bar corresponding to the steel reinforcement cage is welded with the upper and lower surfaces of the bottom steel plate; a plurality of the steel bars are transversely welded between the two side steel plates; the length of the bottom steel plate is the tunnel diameter plus 1 meter, the thickness is 2 centimeters to 5 centimeters, and the width is equal to the thickness of the underground continuous wall; and sulfur concrete is poured in the upper opening steel moulding plate, and ordinary concrete is poured on the underground continuous wall except the upper opening steel moulding plate. The structure solves the problems that a knife head is wounded by the traditional shield method, the knife head and the steel bar confront the tough with toughness, and the surrounding concrete is pulled, and has the advantages of reducing the knife head loss of the shield machine and improving the shield efficiency.

Description

technical field [0001] The invention relates to a supporting structure in the construction of a shield machine, in particular to a concrete door sealing structure and a construction method used together in the starting and receiving construction of the shield machine. Background technique [0002] The underground diaphragm wall adopts a reinforced concrete structure, the steel cage is hoisted integrally or step by step, the concrete is cast in place as a whole, and the shield machine penetrates the underground diaphragm wall. [0003] During the tunnel construction process, the shield machine will penetrate the underground continuous wall during the starting and receiving process, and the cutter head of the shield machine will produce a lot of wear and tear. The steel bars will wrap around the cutter head, and at the same time, the surrounding steel bars will tear the surrounding concrete, causing a series of problems such as cracking of the surrounding concrete and difficul...

AI Technical Summary

Problems solved by technology

[0007] When the foundation pit is excavated, the fiber reinforcement cage is hoisted. Under the action of self-weight and unfavorable impact of on-site construction, the fiber reinforcement is seriously brittle. It is necessary to use segmented and framing methods to hoist the reinforcement cage. long

[0008] At the same time, there will still be a small amount of fiber tendons winding around the cutter head and pulling the surrounding concrete, which will wear the cutter head and cause the surrounding concrete to crack

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