Bent bolt combination joint for secondary lining of mining method construction tunnel and reinforcing method

Abstract

The invention discloses a bent bolt combination joint for a secondary lining of a mining method construction tunnel and a reinforcing method. The combination joint comprises an outer arc surface jointand an inner arc surface joint, wherein the outer arc surface joint comprises connecting grooves which are correspondingly formed in the end parts of two opposite secondary lining segments, one sideof each connecting groove is provided with a C-shaped component, a bolt hole is formed in the bottom surface of each C-shaped component, an anchor bar is arranged in each bolt hole in a penetrating manner, and the C-shaped components are connected through H-shaped components; one end of each H-shaped component is abutted against a supporting component; the inner arc surface joint comprises two annular joint hand holes which are symmetrically formed relative to the end parts of the secondary lining segments; and the reinforcing method comprises the step of presetting the connecting grooves, theC-shaped components, the annular joint hand holes and bent bolt holes in the two secondary lining segments. According to the bent bolt combination joint and the reinforcing method, the problems thatthe rigidity of the secondary lining is insufficient and the joint is easy to fracture in the prior art can be solved, the structure is simple, the reliability is high, the stress concentration effectof the segment joint can be remarkably weakened, and the concrete fracturing risk of the segment joint is reduced.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a curved bolt combination joint used for the second lining of a tunnel constructed by mining method and a reinforcement method. Background technique [0002] The method usually used in existing tunnel construction is the mining method, which includes the traditional mining method, the new Austrian method, the new Italian method and similar construction methods. Reinforced trolleys are used for cast-in-place construction, and the construction efficiency is low. [0003] With the development of construction mechanization and intelligence, the secondary lining reinforcement of tunnels is prefabricated in factories and assembled on site, which can not only improve construction efficiency, but also reduce material waste and environmental pollution. Broad application prospects. [0004] Different from the general circular tunnel section constructed by rock boring machine, t...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a bent bolt for the secondary lining of tunnels constructed by mining methods, which can solve the problems of insufficient rigidity of the joints of the secondary lining reinforcement segment in the prior art and the joint fracturing easily Combination joints and reinforcement methods

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