Circumferential block structure of prefabricated rectangular shield tunnel lining

Abstract

The invention discloses an annular partitioning structure of an assembled type rectangular shield tunnel lining. The annular partitioning structure consists of a top inverted arch partitioning block, a first corner part partitioning block, a first side wall partitioning block, a second corner part partitioning block, a bottom inverted arch partitioning block, a third corner part partitioning block, a second side wall partitioning block and a fourth corner part partitioning block which are connected in series in sequence in the annular direction, wherein the fourth corner part partitioning block is also connected with the top inverted arch partitioning block to integrally form a closed ring in a surrounding manner; splicing joints between the adjacent partitioning blocks are positioned at positions, which are lower in stress, on the lining. The splicing joints of all the partitioning blocks are positioned at positions, which are lower in stress, on the lining, so that stress on the partitioning blocks can be easily met; correspondingly, the partitioning blocks at the regions, which are higher in stress, on the lining are continuously arranged, so that the stress performance of the lining is effectively guaranteed; therefore the annular partitioning structure of the lining can better adapt to the stress characteristic of a rectangular shield tunnel, and the water resistance and the waterproofing capacity of the tunnel are effectively improved.

Description

technical field

[0001] The invention relates to the technical field of structural design of shield tunnel lining, in particular to a ring-direction block structure of an assembled rectangular shield tunnel lining. Background technique

[0002] With the development of science and technology, a rectangular shield tunneling method suitable for soft soil areas has been deeply studied at home and abroad. The rectangular shield tunnel can make full use of the structural section, effectively reducing the tunnel depth and cost. The commonly used circular shield segment has many mature segment division forms, however, the shape of the rectangular shield segment is different from that of a circle, and the method of segment division has not been clearly defined; in addition, the applicant It is found that the rectangular shield tunnel is mainly subjected to bending, which is different from the traditional circular shield tunnel. If no distinction is made and improvements are made, the...

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