Parallelogram segment body structure for shield tunneling machine

Abstract

The invention discloses a parallelogram segment body structure for a shield tunneling machine. The parallelogram segment body structure comprises a single annular segment body, wherein the signal annular segment body comprises four or six standard segments, one bottom segment and one top sealing segment, the horizontal projection contour lines of inner arc surfaces of the standard segments constitute a parallelogram, the horizontal projection contour lines of the inner arc surface of the bottom segment form an isosceles trapezoid, and the horizontal projection contour lines of the inner arc surface of the top sealing segment form an inverted isosceles trapezoid; each of the radial joint of the top sealing segment and each standard segment, the radial joint of every two adjacent standard segments and the radial joint of the bottom segment and each standard segment forms an included angle of 12-15 degrees with the radial surface of the single annular segment body. The parallelogram segment body structure has the advantages that the segments are flexibly separated, the splicing positions of the segments are fixed, the joint of the annular seam and the radial seam of the spliced signal annular segment body is smooth, the single annular segment body is easy to compact flatly during splicing, and the parallelogram segment body structure has better waterproof performance.

Description

technical field [0001] The invention relates to a full-face tunnel boring machine, in particular to a segment structure for a shield boring machine. Background technique [0002] The segment is the permanent lining structure of the shield tunneling method. On the one hand, the segment acts as a lining for the tunnel, and on the other hand, it provides support for the excavation of the shield tunneling machine. Therefore, the advantages and disadvantages of the segment structure design have a great influence on the construction progress and waterproof performance of the tunnel. At present, the segment structure used in shield tunneling is mainly divided into two types: hexagonal segment and wedge-shaped segment. 1. When the hexagonal segment is assembled, one ring is composed of four segments. The advantage is that fewer blocks simplify the assembly process and process, and the assembly position of each segment is fixed, which is conducive to the arrangement of equipment on ...

AI Technical Summary

Problems solved by technology

1. When the hexagonal segment is assembled, one ring is composed of four segments. The advantage is that fewer blocks simplify the assembly process and process, and the assembly position of each segment is fixed, which is conducive to the arrangement of equipment on the bottom segment. The transport track facilitates the transportation of equipment and greatly improves the construction progress; the disadvantage is that when the tunnel diameter is large, fewer blocks make the volume and weight of a single segment larger, increasing the segment The difficulty of transportation and assembly, which will have a negative impact on the manufacturing and construction progress of the transportation equipment and assembly equipment of the segment; and the intersection of the hexagonal segment circumferential seam and the radial seam is sharp, and it is difficult to stop water during assembly. Compact, poor waterproof performance

2. The advantages of the wedge-shaped segment are: the division is flexible, and different divisions can be made according to the size of the tunnel diameter; The intersection of the circumferential seam and the radial seam is relatively flat, easy to be compacted and flat when assembled, and has good waterproof performance; the disadvantage is that the wedge-shaped segment can be corrected and turned by the circumferential wedge and the ring-to-ring rotation assembly, so in The position of each segment needs to be accurately calculated when turning and correcting, which increases the difficulty of the assembly process on the one hand, and easily causes radial joints, which is unfavorable to the structure; on the other hand, the assembly position of each segment is not fixed, which is inconvenient to arrange Equipment transportation tracks, thereby causing disadvantages to equipment transportation and construction progress

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