Pipe gallery construction method for shield tunnel expanding excavation

Abstract

The invention discloses a pipe gallery construction method for shield tunnel expanding excavation. The pipe gallery construction method adopts a construction method of 'first shield tunneling and then mining', firstly adopts a shield to quickly and safely pass through a construction section containing ground fissures, then adopts a mining method to perform expanding excavation construction in an expanding excavation section containing the ground fissures, expands a cross section and reserves a clearance on a shield tunnel foundation, a secondary lining and a secondary structure are constructed, deformation joints matched with the ground fissures are reasonably arranged on the secondary lining and the secondary structure, so that the secondary lining and the secondary structure release structural stress in a segmented and split mode, and damage of the ground fissures to the underground structure is effectively avoided. By arranging the enlarged and densified deformation joints on the secondary lining and the secondary structure, not only can the deformation capacity of the structure be improved, but also the waterproof performance of the structure can be enhanced; and in the expanding excavation process, the embedded hanging rings, the winches and the hoisting equipment are adopted to dismantle pipe pieces in the tunnel in a segmented and blocked mode and transport the pipe pieces outwards, and the problem of dismantling the pipe pieces in the tunnel is solved.

Description

Technical field [0001] The present invention relates to a method for the construction of underground utility tunnel, in particular a tube shield tunnel construction method of a gallery dug expansion. Background technique [0002] Pipe Gallery is one of the 21st century new urban infrastructure construction, municipal important symbol of modernization, underground utility tunnel to meet the basic needs of the people's livelihood and improve the overall carrying capacity and plays an important role. After the pipe gallery is completed, the road will effectively solve the zip line "spider web", rainwater flooding and other issues, further open up the urban underground vein. Water, electricity, communications, all the gas line into the eight kinds gallery, handheld terminal, remote monitoring, and other intelligent security dozens of smart technology will be applied in the pipe rack. However, many planned underground pipe gallery in the old city, the need to pass through densely popu...

AI Technical Summary

Problems solved by technology

The underground space structure will be damaged if it passes through the ground fissure zone, and the ground fissures will greatly damage the underground structure. The comprehensive pipe gallery is located in a densely populated city, and the ground and underground construction conditions are complex. Conventional construction methods such as open and buried methods cannot be used. , but only using the shield construction method cannot solve the problem of damage to permanent structures caused by ground fissures

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