Shield tunnel segmental lining structure suitable for building metro under narrow pavement

Abstract

The invention discloses a shield tunnel segmental lining structure suitable for building a metro under a narrow pavement. The shield tunnel segmental lining structure comprises a-type segment rings, b-type segment rings and middle plates. The a-type segment rings, the b-type segment rings and the middle plates form the 8-shaped integrated shield tunnel segmental lining structure. A plurality of arc-shaped A type segments are annularly assembled into the major-arc-shaped a-type segment rings. A plurality of arc-shaped B type segments are annularly assembled into the major-arc-shaped b-type segment rings. The two kinds of segment rings are assembled to form 8-shaped structural rings through the middle plates of which the surfaces are flat and straight and the two ends are triangularly convex. The structural rings meet centrosymmetry and axisymmetry. The multiple structural rings are then longitudinally assembled to form the 8-shaped integrated shield tunnel segmental lining structure. The up-down integrated shield tunnel segmental lining is simple in form, easy and convenient to process and make, convenient to construct, high in integrity, high in strength and good in bearing capacity, land subsidence can be controlled effectively, safety of surrounding buildings can be ensured, and construction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of shield tunnels, in particular to a shield tunnel segment lining structure suitable for constructing subways under narrow road surfaces. Background technique [0002] Urban subways are being vigorously built. When selecting subway lines, in order to make the direction of the lines consistent with the direction of the main passenger flow on the ground, subway tunnels are often built under the main roads of the city, and the shield method is often used. The subway shield tunnels are mostly double-line tunnels, usually with parallel left and right lines. However, in areas where the red line of the road is narrow, in order to avoid certain underground buildings and structures, the double-line subway tunnel will adopt an overlapping shield tunnel with upper and lower separation. The upper and lower overlapping shield tunnels are excavated by the shield machine, and the segments are assembled first and then to ...

AI Technical Summary

Problems solved by technology

The existing problems are: the special-shaped connecting segment is bulky, irregular in shape, and has certain difficulties in mold manufacturing and reinforcement, which is not conducive to industrial mass production, and the four raised joints are easy to be damaged during transportation and installation.

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