地震作用下盾构隧道直径变形率限值研究  

Limiting Value of Diameter Deformation Rate for Shield Tunnels under Earthquake Action

作　　者：董正方[1,2] 姚毅超 王君杰[2] 苏俊省[2] 

机构地区：[1]河南大学土木建筑学院,开封475004 [2]同济大学桥梁工程系,上海200092 [3]中铁二院华东勘察设计有限责任公司,杭州310004

出　　处：《城市轨道交通研究》2015年第8期52-56,共5页Urban Mass Transit

基　　金：国家自然科学基金项目(51408195);住房和城乡建设部科技项目(2008-k3-1);河南省教育厅科学技术研究重点项目(14B560031)

摘　　要：选用最大直径变形率作为地震作用下城市轨道交通盾构隧道的性能指标,并利用盾构隧道衬砌直径变形和内力的关系。通过变形协调推得直径变形率的计算公式。又通过动力增量法,分不同的场地和不同的地震波,计算得出典型盾构隧道的直径变形率。综合考虑后得出地震作用下盾构隧道直径变形率限值:性能I下的限值为3.40‰,性能II下的限值为6.40‰。The maximum diameter deformation rate of tun- nel ling is taken as the performance index for urban mass transit shield tunnels under earthquake action. Based on the relation between tunnel diameter deformation and stress state of tunnels, the diameter deformation rate is derived from the analytical solution by using compatibility of deformation for a segment cross section. Then, the diameter deformation rate is computed by means of incremental dynamic analysis method for different sites in different earth-quake conditions. Through a comprehensive study, it is found that the limiting value of diameter deformation rate will be 3.40‰ under performance Ⅰ, and will be 6.40‰ under performance Ⅱ.

关 键 词：盾构隧道 地震作用 直径变形率 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]