Inter-segment-ring anti-shearing structure penetrating through special stratum tunnel and arranging method ofinter-segment-ring anti-shearing structure

Abstract

The invention discloses an inter-segment-ring anti-shearing structure penetrating through a special stratum tunnel and an arranging method of the inter-segment-ring anti-shearing structure, and belongs to the technical field of tunnel construction. A circular steel ring and a pre-embedded bolt sleeve are separately arranged corresponding to pre-embedding on the end surfaces of two segment rings capable of being matched coaxially, an anti-shearing bolt with buffering pats are further arranged corresponding to the pre-embedded bolt sleeve, so that one end of the anti-shearing bolt can correspondingly connected in the pre-embedded bolt sleeve in a matching mode, the other end of the pre-embedded bolt sleeve can further be embedded into the corresponding circular steel ring after the two segment rings are matched in a corresponding mode, and then the inter-ring anti-shearing structure of a shield tunnel is formed after the two segment rings are matched. According to the inter-segment-ringanti-shearing structure, the structure is simple, the arrangement is simple and convenient, the inter-ring anti-shearing capability of the shield tunnel can be effectively improved, the stability andsafety of the shield tunnelis guaranteed, the inter-segment-ring anti-shearing structure is accurately suitable for the various stress conditions of the shield tunnel, the flexibility of the arrangement is high, the stability is high, the safety and stability of the arrangement of the shield tunnel is greatly improved, and the application prospect and popularization value are comparatively good.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a segment ring inter-shear structure and a setting method thereof for a tunnel passing through a special stratum. Background technique [0002] In recent years, shield tunneling in my country has developed rapidly and has been widely used in subways, railways, highways, water transportation, gas transportation and other fields, which greatly improves the efficiency of people and goods transportation and saves transportation costs . During the construction of shield tunnels, special strata are often encountered, such as crossing active faults, strata with uneven hardness and softness, strata with sudden changes in top load, or strata with sudden changes in geological conditions. When shield tunnels pass through the above-mentioned special strata, there is often the risk of misalignment between segment lining rings, which is also one of the key issues that ne...

AI Technical Summary

Problems solved by technology

However, through continuous research and testing and long-term practical application, it is found that the above-mentioned inter-segment ring shear structure has relatively large application defects

[0004] Although there are distributed concave-convex tenons on the butt joint surface of the segment, the segment can be simultaneously stressed by multiple concave-convex tenons when dislocation occurs; Restricted by the layout of steel bars in the segment, the setting length of the concave-convex tenon is often short, and the shear resistance of the concave-convex tenon in the concrete structure is often poor

For shield tunnels passing through special formations, the above-mentioned distributed concave-convex tenon structure often has limited ability to resist inter-ring displacement, and there is still the possibility of inter-ring displacement, which cannot fully meet the needs of shield tunnel segments passing through special formations. When the application requirements, there are large limitations

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