Compound reinforcing soil structure with soft soil shield penetrating through existing subway and construction method

Abstract

The invention relates to a compound reinforcing soil structure with a soft soil shield penetrating through an existing subway. The structure includes a shield tunnel contour line, pipe sheds adjustable in angle and horizontal rotary spraying piles; a row of the pipe sheds adjustable in angle are arranged at the outer side of the shield tunnel contour line to be dug, each pipe shed adjustable in angle includes a pipe shed steel tube, each horizontal rotary spraying pile is arranged between every two adjacent pipe shed steel tubes, and each horizontal rotary spraying pile can wrap the corresponding pipe shed adjustable in angle and is meshed with the corresponding adjacent horizontal rotary spraying pile; each horizontal rotary spraying pile includes a rotary spraying drill pipe and a drillpipe casing, and the pipe shed steel tubes are connected with the rotary spraying drill pipes. The compound reinforcing soil structure has the advantages that through combined use of the pipe sheds adjustable in angle and the horizontal rotary spraying piles, the combination of rigidity and flexibility is achieved, both hard and soft tactics are used, not only can the advantages of each componentbe fully exerted, but also cooperative work can be well completed, a great overall supporting and protection effect is achieved, the structure can well adapt to the environment of a soft soil area, the soil is reinforced, and the deformation of the existing subway can be well controlled.

Description

technical field [0001] The invention relates to the field of soil compound reinforcement construction in which a shield machine passes through an existing subway in a soft soil area, in particular to a soil compound reinforcement structure and a construction method for a shield machine to pass through an existing subway in a soft soil area. Background technique [0002] With the continuous advancement of the urbanization process, urban underground rail transit is becoming more and more important. To build a complete subway network, there must be intersections of subway lines. In shield construction of subway tunnels, the number of new shield tunnels crossing existing subway tunnels is increasing day by day. Newly built shield tunnels will have many adverse effects on existing subway tunnels, such as segment cracking, joint opening, bolt failure, uneven longitudinal settlement, and excessive horizontal displacement, especially in existing tunnels in soft soil areas. Deformat...

AI Technical Summary

Problems solved by technology

Newly built shield tunnels will have many adverse effects on existing subway tunnels, such as segment cracking, joint opening, bolt failure, uneven longitudinal settlement, and excessive horizontal displacement, especially in existing tunnels in soft soil areas. Deformation and segment damage will affect the comfort and smoothness of the locomotive running, aggravate the wear and tear of the train, and seriously cause major accidents such as locomotive derailment

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