Method for hoisting large steel structure in semi-cover excavation construction of subway station

By using a specialized transportation and installation system and lifting mechanism in the semi-cut-and-cover construction of subway stations, the problems of high resource consumption, low efficiency, and difficulty in ensuring safety in steel support installation have been solved, achieving efficient and safe installation of steel structures.

CN121948282APending Publication Date: 2026-05-01CHINA RAILWAY NO 10 ENG GRP CO LTD +1
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Patent Information

Application Number
CN202610337814.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-19
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

In urban rail transit engineering, the installation of steel supports for semi-cut-and-cover construction of subway stations suffers from problems such as high resource consumption, low construction efficiency, and difficulty in ensuring safety, especially in confined spaces where safe and efficient installation is difficult to achieve.

Method used

A dedicated transportation and installation system was designed, including a traveling guide rail, a traveling vehicle, a small trolley, and a hanging rail, traveling beam, and electric hoist under the roof of the cut-and-cover area. Through the coordinated operation of these devices, the steel structure can be directly, efficiently, and smoothly transported and precisely installed. The use of a lifting mechanism ensures height matching and stability.

Benefits of technology

It enables continuous, stable movement and precise positioning of steel structures, simplifies construction processes, reduces labor intensity and construction safety risks, reduces reliance on mechanical equipment, and improves installation efficiency and accuracy.

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Abstract

The invention relates to the technical field of civil engineering foundation pit supporting, in particular to a hoisting method for a large steel structure in semi-cover excavation construction of a subway station. Comprising an open excavation area and a cover excavation area; the steel structure is conveyed into the foundation pit from the open excavation area through a crane and conveyed to the cover excavation area from the interval area between the middle pile bodies; the position of the walking vehicle is adjusted, and the height of the carrier roller frame is adjusted through the lifting mechanism to correspond to the position of the conveyed steel structure; after the steel structure penetrates through a steel rope ring connected with the first electric hoist, the steel structure is conveyed to the small trailer, and the left end of the steel structure is located on the left side of the small trailer; the small trailer carries the steel structure to walk leftwards for a certain distance and is lifted by the steel rope ring connected with the electric hoist, and the small trailer and the steel structure jointly convey the steel structure to the steel enclosing purlin and are manually connected; after the steel structure in the area is installed, the walking beam is started to move forwards along the hanger rail, and the chain drives the walking vehicle to move to the next construction position at the same time. The method is simple in process, convenient to operate, high in construction efficiency and small in resource waste.
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