地铁隧道复合式结构可靠度简化分析方法研究.pdf

28 Vol.28 Supp. 2007 10 Rock and Soil Mechanics Oct. 2007 (2007) 0443 06 ( 050043) -4 5 10 - U 451 A Research on simplified method of multiple structure reliability of metro tunnel 1,2 2 2 SONG Yu-xiang , JIA Xiao-yun , ZHU Yong-quan (1. Southwest Jiaotong University, Chengdu 610031, China; 2. School of Civil Engineering, Shijiazhuang Railway Institute, Shijiazhuang 050043, China) Abstract Performance function of lining structure reliability is established according to “action-reaction” model. Based on the statistical characteristics of physical property obtained by exploration of No.4, No.5 and No.10 line of Beijing Subway, the structural reliability of Beijing metro tunnel is analyzed by using Monte-Carlo method. The effects of primary support and lining under the condition of natural environment are discussed, the results consider that lining bear the whole loads during the operation and primary support only improve the work environment of lining. The elastic resisting coefficient around the lining should be increased, which can not only simplify calculation, but also meet the working situation of lining structure. Key words metro tunnel; action-reaction model; primary support; secondary lining; effect relationship; structural reliability 1 ()