A new formwork trolley for the second lining of the large-section parking line in the underground excavation of the subway section

Abstract

A novel formwork trolley for secondary lining of a large-section stop line of an underground excavation subway section comprises a tunnel upper formwork (1), side wall formworks (2) and a trolley frame (3), and the upper formwork (1) is arranged in the form of a large-span bent arc formwork with radian; the side wall formworks (2) are arranged on the two sides of the lower portion of the upper formwork (1) respectively, the side wall formworks (2) are arranged in a large-span formwork mode with a slight radian, the upper formwork (1) and the two side wall formworks (2) are hinged, and formworkfixing structures (4) are arranged on the back faces of the upper formwork (1) and the two side wall formworks (2); and an advancing track (5) is arranged on the ground of the tunnel, and the trolleyframe (3) is arranged on the advancing track (5). The invention belongs to the intelligent equipment industry, and has the advantages of reasonable design, simple structure, safety, reliability, convenience in use, easiness in maintenance and good popularization and application values.

Description

technical field [0001] The invention belongs to the intelligent equipment industry, and relates to the technical fields of rail transit and engineering machinery, in particular to a new formwork trolley for underground excavation of the second lining of a large-section parking line in a subway section. Background technique [0002] In recent years, the pressure on urban traffic has increased, and major cities have begun to build rail transit projects. The section of the underground excavation station tunnel in the city is large, the section changes a lot, and the construction is difficult. In the rail transit tunnel project, the excavation space of the station tunnel has a maximum height of nearly 32m, a span of nearly 24m, a total excavation area of ​​nearly 760m2, and the thickness of the rock layer at the shallowest depth is only 9m, and the secondary lining is a reinforced concrete structure, which is difficult to ensure Safe and fast construction of the project. [00...

AI Technical Summary

Problems solved by technology

The speed of formwork reinforcement and the quality of the formwork directly affect the construction speed. Under the pressure of the concrete pouring operation, the formwork of the trolley converges and deforms inward, resulting in the success or failure of the lining slab joints and the smooth joints of the tunnel slab joints.

The traditional method is that after the trolley is in place, the formwork is reinforced circularly from bottom to top, and supported while being reinforced. After the formwork is removed, the formwork is not reused, resulting in waste, long working time, and unreasonable support of the formwork. After the formwork is removed, the seams of the lining boards are wrong and must be repaired to meet the flatness requirements

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