Lining structure of a horseshoe-shaped shield tunnel

Abstract

The invention relates to a horseshoe-shaped shield tunnel lining structure. A ring of the lining structure consists of ten pipe pieces which are classified into 7 types and comprises a first standard block, a second standard block, a first corner block, a second corner block, a first transition block, a second transition block and a top sealing block. During pipe piece splicing, firstly the second standard block at the bottom is spliced, and then the first corner block, the second corner block, the second standard block, the first transition block, the second transition block, the first standard block and the top sealing block are spliced towards two sides. The pipe pieces are annularly and radially connected by virtue of hand holes via bolts. The horseshoe-shaped shield tunnel lining structure has the advantages that the stress characteristics of the horseshoe-shaped lining structure are considered, and a shield tunnel horseshoe-shaped pipe piece structure design is section-variable, so that the structure space and the material strength are fully used; edges of partial pipe pieces are of a stepped design, so that the capability of bearing the shear force is improved; the single ring is less in pipe piece quantity and form; the positions of the radial hand holes meet a certain geometrical relationship, so that one set of pipe pieces can meet the requirement of staggered splicing.

Description

technical field [0001] The invention relates to a lining structure form of a shield tunnel, in particular to a lining structure of a horseshoe-shaped shield tunnel. Background technique [0002] At present, the shield method has become one of the main methods of urban tunneling. After decades of development, my country's shield technology has made great progress, especially the construction of a large number of rail transit projects, which has promoted the development of my country's shield technology to the world's advanced level. The development of the shield tunneling method has been quite mature. Through the adjustment of the main technical schemes such as the balance method of the excavation surface and the form of the cutterhead, the shield tunneling method has strong stratum adaptability. From small municipal pipeline tunnels, to subway tunnels with a diameter of several meters, to large cross-river tunnels with a diameter of more than 15m, the shield method can be u...

AI Technical Summary

Problems solved by technology

Although shield technology has advanced by leaps and bounds, its geometric shape is still mainly circular. Although circular tunnels have great advantages in terms of stress conditions and mechanical design, their problem is that the space utilization rate is low; on the other hand , in the soil layer with a small lateral pressure coefficient, the circular tunnel cannot give full play to its structural advantages

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