摘要
应用荷载-结构模型,建立了地铁矿山法区间隧道二次衬砌结构截面可靠度功能函数,根据北京地铁4,5和10号线勘探地质地层物理力学性质统计特征,利用蒙特卡罗方法进行区间隧道结构可靠度分析。探讨了在长期自然环境下复合式衬砌的初期支护与二次衬砌各自的作用,认为二次衬砌承受运营阶段的全部荷载,初期支护的作用仅仅是改善了二次衬砌的工作环境,改善后二次衬砌周围的弹性抗力系数应适当提高,这样处理不仅可简化计算工作,也符合衬砌结构的实际工作情况。
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.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第S1期443-448,共6页
Rock and Soil Mechanics
基金
北京地铁公司科研项目(No.DTKH2004010004)。
关键词
地铁隧道
荷载-结构模型
初期支护
二次衬砌
作用关系
结构可靠度
metro tunnel
action-reaction model
primary support
secondary lining
effect relationship
structural reliability
