Construction method for crossing for complex formation of shield under ultra-deep earth

Abstract

The invention relates to a construction method for the crossing for a complex formation of a shield under ultra-deep earth, comprising the following specific steps of: 1, setting the front earth pressure of the shield; 2, improving the front earth body of the shield; 3, controlling the attitude of the shield; and 4, controlling synchronous grouting for the tail of the shield. Via the construction method disclosed by the invention, many difficulties and problems in shield construction in many complex formations can be solved, and mature ultra-deep shield tunnelling construction processes and construction technologies in sandy soil confined aquifers are formed to lay the foundation for the development of underground space exploitation to the deep in future, thus overcoming the limitation of shield projects in areas with many underground installations, and guaranteeing the sustainable development of underground shield tunnel project development and the universality of application.

Description

technical field [0001] The invention relates to a construction method for shield tunneling through complex strata, in particular to a construction method for ultra-deep soil-covered shield tunneling through complex stratum. Background technique [0002] As an important construction method of urban rail transit, shield tunneling has been applied in the rail transit construction of domestic cities such as Shanghai and Beijing for more than 20 years. After more than 20 years of development, the construction technology has become increasingly mature. The space utilization rate is not high, and the conditions for the development of underground space are relatively good. Most of the previous shield tunnels were constructed in shallow underground spaces. The buried depth of shield tunnels involved in urban rail transit construction is generally not high. More than 30m. As for ultra-deep shield tunnels with a buried depth of more than 30m, whether it is excavation equipment or cons...

AI Technical Summary

Problems solved by technology

[0002] As an important construction method of urban rail transit, shield tunneling has been applied in the rail transit construction of domestic cities such as Shanghai and Beijing for more than 20 years. After more than 20 years of development, the construction technology has become increasingly mature. The space utilization rate is not high, and the conditions for the development of underground space are relatively good. Most of the previous shield tunnels were constructed in shallow underground spaces. The buried depth of shield tunnels involved in urban rail transit construction is generally not high. more than 30m