Duct piece connecting and supporting system suitable for multi-circle shield and construction method of duct piece connecting and supporting system

Abstract

The invention provides a duct piece connecting and supporting system suitable for a multi-circle shield and a construction method of the duct piece connecting and supporting system. The duct piece connecting and supporting system comprises seagull-shaped duct pieces, stand columns, combined structural beam components and steel-concrete structures. The seagull-shaped duct pieces are arranged at the intersection of two adjacent circles in a multi-circle tunnel; the stand columns are arranged between the upper and lower intersections of the two adjacent circles in the multi-circle tunnel and are connected with the seagull-shaped duct pieces; a combined structural beam component is arranged between the seagull-shaped duct pieces and the stand columns and comprises a C-shaped component; and a steel-concrete structure is used for filling and wrapping the combined structural beam component. According to the duct piece connecting and supporting system suitable for the multi-circle shield and the construction method of the duct piece connecting and supporting system, the seagull-shaped duct pieces and the stand columns are connected through the combined structural beam components and the steel-concrete structures wrapping the combined structural beam components, the connecting structure at the intersection position of every two adjacent circles in a multi-circle tunnel structure is simplified, all the components form a closed stress system, the bearing capacity is higher, the column span is increased, and the built underground space is wider; and the seagull-shaped duct pieces, the combined structural beam components and the stand columns can be prefabricated in advance, the machining precision is high, the machining quality is reliable, and the site construction speed is high.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a segment connection support system suitable for multi-circular shield tunneling and a construction method thereof. Background technique [0002] With the continuous development of shield tunneling technology in our country, especially the vigorous development of rail transit in the past 20 years, shield tunneling technology has become more mature and perfect. But up to now, the shield method is mainly used for the construction of narrow and long underground structures such as tunnels. In terms of underground stations, parking lots, and commercial complexes, the application of shield technology is still relatively small, mainly because of the three-round and multi-round shields. The development of structural technology is still relatively slow, and related supporting technologies are not mature enough. [0003] The publication date is April 10, 2020. The Chinese inve...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned technical problems, the present invention proposes a segment connection support system suitable for multi-circle shield tunneling and its construction method to solve the problem of the support structure and central shield segment of multi-circle shield tunneling in the prior art. And the connection effect of the side shield segment is not good

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