Construction method of main line fabricated secondary lining in subway underground excavation section

Abstract

The invention provides a construction method of a main line fabricated secondary lining in a subway underground excavation section. Construction of a tunnel secondary lining structure is completed in a subway underground excavation section of a structure subjected to primary supporting by means of the method that starting and receiving of a prefabricated pipe piece assembling device and conveying of materials such as a prefabricated pipe piece are conducted through a conventional vertical shaft and a cross channel, and assembling of the prefabricated pipe piece is conducted through a dedicated pipe piece assembling device, flexibility of an underground excavation tunnel is combined, meanwhile the mechanical level and construction work efficiency of an underground excavation secondary lining are improved, an on-site operation environment is improved, safety of on-site operation is improved, the water-proof quality is improved, and industrial production is achieved.

Description

technical field [0001] The invention belongs to the technical field of rail transit engineering construction, and in particular relates to a construction method in which the secondary lining structure is assembled in a prefabricated segment hole for an interval tunnel with a completed primary support structure in an underground excavation interval of a subway. Background technique [0002] Existing data show that submerged tunnel assembly structures have been implemented and applied in Japan and the former Soviet Union. Among them, when building a highway tunnel in Japan, prefabricated slab and formwork technology was used, and the inverted arch and filling were poured with roller compacted concrete, which accelerated the construction progress and improved the quality of the inverted arch and filling concrete. During the construction, the dry hard concrete with a small slump is paved first, and then the reinforced concrete prefabricated slabs are laid on the concrete surface...

AI Technical Summary

Problems solved by technology

Shield tunneling and shield machine equipment design, construction, research and application technology are relatively mature, but the cost of shield tunneling section projects is relatively high, and the origination and reception of shield tunneling have high requirements for site conditions. How to combine the flexibility of underground excavation tunnels while Improving the mechanization level and construction efficiency of the secondary lining of underground excavation tunnels, improving the on-site operation environment, improving the safety of on-site operations, improving the waterproof quality, and realizing industrialized production are one of the development trends of underground excavation tunnel construction.

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