Cross-river large-diameter slurry shield excavation and double-lining parallel construction method

Abstract

The invention relates to the technical field of tunnel slurry shield construction, and particularly relates to a cross-river large-diameter slurry shield excavation and double-lining parallel construction method. The problems of long entire construction period and high cost, caused by the fact that the conventional cross-river slurry shield cannot be used for carrying out double-lining construction, can be solved. The cross-river large-diameter slurry shield excavation and double-lining parallel construction method comprises the following steps of: paving H-shaped steel, and constructing an inverted arch after a back-up tunneling rail; re-mounting slurry charge and discharge pipes for shield construction on the inverted arch, and connecting the inverted arch with the slurry charge and discharge pipes for the shield construction by using rubber hoses; paving a double-lining rail on the constructed inverted arch, and binding steel bars and splicing templates by using a movable simple and easy trolley and a double-lining trolley; and dynamically pouring concrete by using a temporary turnout. With the adoption of the cross-river large-diameter slurry shield excavation and double-lining parallel construction method provided by the invention, the inverted arch is constructed below the back-up tunneling rail, so that the difficult problem that the double-lining construction cannot be carried out due to the fact that the slurry charge and discharge pipes are hung on pipe sheets in a slurry shield excavation process can be solved. Therefore, the interference on the shield excavation, caused by assembling inside a lining trolley hole, can be reduced; the construction period can be reduced; and the cross-river large-diameter slurry shield excavation and double-lining parallel construction method has the advantages of simple process, low construction cost, controllable schedule, flexible process adjustment and the like.

Description

technical field [0001] The invention relates to the technical field of tunnel mud-water shield construction, in particular to a large-diameter mud-water shield tunneling across a river and a parallel construction method for secondary linings. Background technique [0002] With the rapid development of the transportation industry, the mud-water shield construction technology used to cross rivers and rivers in cities has become more and more mature, and has been widely used in Shanghai, Guangzhou, Shenzhen, Wuhan, Nanjing and other cross-river and ocean tunnels. From the subway to the highway, water conservancy, and natural gas pipelines, and began to develop in the direction of large diameter, ultra-shallow buried, long distance, and high water pressure. [0003] Among the shield tunnels in China, only the shield tunnel project of the South-to-North Water Diversion Project has the secondary lining construction after the shield excavation is completed, and the other shield tun...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing river-crossing mud-water shield cannot carry out secondary lining construction during excavation, which leads to the extension of the entire construction period and the increase in cost, the present invention provides a river-crossing Parallel Construction Method of Large Diameter Slurry Shield Tunneling and Secondary Lining

Images