Tunnel assembly type inverted arch precast block structure

Abstract

The invention relates to a tunnel assembly type inverted arch precast block structure. An assembly type inverted arch precast block is of a precast structure, the bottom face is an arc face, the top face is a plane, the two sides are contact faces with an arch wall cast-in-place secondary lining, and a longitudinally-through through hole is reserved in the assembly type inverted arch precast block; and assembly type inverted arch precast blocks are longitudinally and sequentially spliced in the line direction to form a tunnel inverted arch structure. According to the tunnel assembly type inverted arch precast block structure, the structure type requirement of a tunnel assembly type inverted arch is met, the space below the inverted arch precast block is used as a tunnel longitudinal drainage ditch, ditches on the two sides of a drilling and blasting method tunnel can be adjusted to the interior of the assembly type inverted arch block, the space on the two sides of the tunnel is saved, the section outline of the tunnel is optimized, and the concrete consumption is reduced, so that the engineering investment is reduced; and the inverted arch precast block structure can be prefabricated in a factory-like and standardized manner, so that the quality is more reliable; the inverted arch precast block is more reasonable in structural form stress, can improve the concrete grade, reduce the structural size and reduce the manufacturing cost, and is suitable for underground engineering such as tunnel construction through a drilling and blasting method.

Description

technical field [0001] The invention belongs to the technical field of tunnels and underground engineering, and in particular relates to a tunnel-assembled inverted arch prefabricated block structure. Background technique [0002] At present, the drilling and blasting method is still the main construction method in the construction of mountain tunnels. The inverted arch basically adopts the cast-in-place structure, and the prefabricated inverted arch construction has been applied in the tunnel constructed by the TBM method. Still very low. Due to the influence of site construction conditions, external environment and construction personnel during the construction of cast-in-place structures, some tunnels have suffered from defects such as inverted arch deformation, cracks, upper drums, and mud-flowing, resulting in high maintenance costs during operation and serious Sometimes even affect the train operation. Through the investigation, it was found that the uneven thickness...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a tunnel assembly inverted arch prefabricated block structure, which adopts the scheme of factory production, solves the problem that the construction quality of tunnel inverted arches is easily restricted by external conditions, and meets the requirements of tunnels using assembled inverted arch structures , can realize the modular design of inverted arch, factory and standardized production

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