Mechanical underground excavation pushing system for large-section rectangular segment pipe piece of subway station and construction method

Abstract

The invention discloses a mechanical underground excavation pushing system for a large-section rectangular segment pipe piece of a subway station and a construction method, and belongs to the technical field of non-excavation construction. The mechanical underground excavation pushing system for the large-section rectangular segment pipe piece of the subway station comprises a box chamber pipe piece and a pushing system, wherein the box chamber pipe piece is composed of a steel plate and a built-in truss; the pushing system comprises a reaction wall, an originating station, a rear backrest plate, an oil cylinder and a jacking iron; the originating station is composed of a guide rail foundation beam and a track; the reaction wall is a reinforced concrete wall; the steel plate is pre-embedded in the reaction wall and is connected with the rear backrest plate in a welding manner; the rear backrest plate is divided into an upper block, a lower block, a left block and a right block for assembly; and the rear backrest plate is composed of a panel and a stiffening plate. According to the mechanical underground excavation pushing system for the large-section rectangular segment pipe piece of the subway station and the construction method, the box chamber pipe piece is composed of the steel plate and the built-in truss, and is processed in sections, so that the transportation and the hoisting are convenient; and the advantages of tensile property of steel, compressive property of concrete, torsional stability of the truss and the like are fully utilized, so that the mechanical underground excavation pushing system has good tensile property, compressive property and torsional property.

Description

technical field [0001] The invention relates to the technical field of trenchless construction, in particular to a mechanical underground excavation jacking system and a construction method for a large-section rectangular segment segment of a subway station. Background technique [0002] Trenchless engineering technology solves the problems of damage to urban buildings and road traffic congestion during pipeline burying construction, and highlights its advantages in stabilizing soil layers and environmental protection. This is very important for cities with heavy traffic, dense population, numerous ground buildings, and complex underground pipelines. It creates a clean, comfortable and beautiful environment for the city. At present, a large number of underground projects have adopted trenchless technology such as pipeline jacking. [0003] However, for the construction of the subway station, because of its large space area, the jacking construction has proved to be very dif...

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Problems solved by technology

[0005] The purpose of the present invention is to propose a large-section rectangular section segment mechanical excavation jacking system and construction method of a subway station, so as to solve the problem in the prior art that the large-section subway station is difficult to carry out trenchless pipe jacking construction, and the reinforced concrete prefabricated pipe The sheet is large in size, heavy in weight, and difficult to transport. There are risks in structural construction and force conversion, and the overall strength and bearing capacity are insufficient.

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