Construction method of movable bracket system for secondary lining of shallow-buried subsurface tunnel

Abstract

The invention provides a construction method of a movable bracket system for a secondary lining of a shallow-buried subsurface tunnel. The construction method comprises the following steps that 1, construction preparation is conducted, specifically, a steel arch, a standard steel formwork and the movable bracket system are adopted to be combined for construction; 2, a bracket foundation support isconstructed; 3, a bracket is mounted and constructed; and 4, bracket overall moving construction is conducted, specifically, after the bracket overall moves to the preset position, the bracket is jacked through a jack, a traveling mechanism is removed, the jack looses, thus a bracket body falls back onto the concrete surface of an inverted arch of the secondary lining, moving is completed, foundation reinforcing work is repeated, and secondary lining construction of the construction segment is conducted. According to the construction method, the problems that the secondary lining of the small-and-medium-section subsurface tunnel is tedious and complex in construction process, slow in construction progress, excessively high in economic cost and the like are solved, the bracket has the advantages that the mounting and demounting speed is high, the bracket can be utilized cyclically after one-time mounting and forming, and the construction method is worthy of vigorous promotion.

Description

technical field [0001] The invention relates to the technical field of secondary lining construction of underground excavation tunnels, in particular to a construction method of a mobile support system for secondary lining of shallow buried underground excavation tunnels. Background technique [0002] At present, the most common construction methods for the secondary lining of shallow-buried tunnels are hydraulic formwork trolleys and bowl-shaped full-wall supports. Although the construction efficiency of the hydraulic formwork trolley is high and the construction method is simple, the equipment cost is too high, the hoisting is difficult, and the installation and disassembly takes a long time. However, although the rental cost of the bowl button full hall bracket is relatively small and the installation and layout are flexible, each construction section needs to be repeatedly installed and disassembled, which seriously delays the construction schedule. Contents of the inv...

AI Technical Summary

Problems solved by technology

Although the construction efficiency of the hydraulic formwork trolley is high and the construction method is simple, the equipment cost is too high, the hoisting is difficult, and the installation and disassembly takes a long time

However, although the rental cost of the bowl-buckle full hall bracket is relatively small and the installation and layout are flexible, each construction section needs to be repeatedly installed and disassembled, which seriously delays the construction schedule.

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