Based on the Engineering Practice of Selection of the Dual Mode (TBM - EPB) and Adaptive Effect Evaluation Analysis

Abstract The subway tunnels built in some coastal cities often cross the soft and hard alternating strata, which makes shield construction more difficult. single mode cannot meet needs of efficient environmental protection, while dual (TBM-EPB) can better adapt to complex geological conditions alternating, effectively improve tunneling efficiency machine, ensure safety timeliness project construction. Based on practice tunnel between Liuxiandong Station Bai mang Shenzhen Metro Line 13 passing through long distance this paper studies machine used section, establishes use shield, conducts development a series key technologies process such as conversion, pressure replacement screw conveyor, etc, adaptability double long-distance strata Baimang is evaluated. At present, has been successfully completed, its practical experience provides reference for promotion application TBM-EPB under similar conditions.