Tunnel structure for subway shield intervals and method for reinforcing strata

Abstract

The invention discloses a tunnel structure for subway shield intervals and a method for reinforcing strata. The tunnel structure for allowing the subway shield intervals to cross rivers underneath comprises multiplayer linings and grouting pipes. Reinforcing layers are formed in the strata by the grouting pipes. The method for reinforcing the strata for allowing the subway shield intervals to laterally cross viaducts includes arranging the deep grouting pipes and the reinforcing layers. The tunnel structure for allowing the subway shield intervals to cross the rivers underneath comprises the multiplayer linings, the grouting pipes and the reinforcing layers. Structures for reinforcing the strata for allowing the subway shield intervals to laterally cross the viaducts comprise the deep grouting pipes and the reinforcing layers. The tunnel structure and the method have the advantages that the bearing capacity of the subway shield intervals can be improved, influence of underneath crossing tunnel construction on the existing rivers on the ground and the existing viaducts can be reduced, and accordingly the tunnel structure and the method have high popularization value.

Description

technical field [0001] The invention relates to the technical field of tunnel construction in urban subway sections, in particular to a tunnel structure and ground reinforcement method used in subway shield sections. Background technique [0002] With the rapid development of urban subway construction, the density of urban subway network is getting higher and higher. Since the urban subway construction in our country is often carried out under the condition that the ground land use and building planning of the old city or new city have been or have been completed, the setting of the subway line is usually subject to the complex ground environment and underground buildings and structures in the existing cities. influences. When the subway line is laid in the central area of ​​the city, it will inevitably pass through various existing ground buildings and structures, such as urban expressways, viaducts, urban rivers, and high-rise buildings on the ground. Especially when the...

AI Technical Summary

Problems solved by technology

In addition, at present, domestic subway shield tunnels usually use single-layer prefabricated segments as the lining structure. Single-layer segments are prone to water leakage and other phenomena during tunnel operation. The service life under the influence of train vibration and groundwater corrosion will be shortened, and the tunnel structure needs to bear greater loads when passing through the existing buildings and structures on the ground under or sideways, so the single-layer lining tunnel structure itself will be damaged during construction and long-term operation. The security risk is also very high

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