液化场地区间隧道地震响应分析  

Seismic Response Analysis of Running Tunnels in Liquefiable Site

作　　者：张艳美[1] 吴文涛 李国勋 毕舰心 ZHANG Yanmei;WU Wentao;LI Guoxun;BI Jianxin(College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, China;Beijing Harbor Real Estate Development Co., Ltd., Beijing 100020, China)

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266580 [2]北京海港房地产开发有限公司鲁能集团,北京100020

出　　处：《地震工程学报》2021年第2期412-420,共9页China Earthquake Engineering Journal

基　　金：国家自然科学基金(51208510);山东省研究生教育质量提升计划项目(SDYAL17020)。

摘　　要：为研究液化场地区间隧道的动力响应,利用FLAC^(3D)软件分析一致激励、局部液化和行波激励对隧道结构动力响应的影响。计算结果表明:地基土液化改变了隧道衬砌的受力状态,衬砌的破坏位置由非液化场地的拱肩和拱脚处转成了液化场地的仰拱和拱腰位置;与液化场地相比,隧道穿越局部可液化土层时,破坏位置扩展到衬砌整个断面;与一致激励相比,行波激励使衬砌的主应力增大、主应力分布改变并承受扭转作用。To study the dynamic response of running tunnels in liquefiable site,the dynamic responses of tunnel structures under uniform excitation,local liquefaction,and traveling wave excitation were analyzed by the FLAC^(3D) software.The calculation results showed that the liquefaction of foundation soil affects the stress state of tunnel lining,and the failure position of lining changes from the arch shoulder and arch foot in non-liquefied site to the invert arch and arch waist in liquefied site.Compared with the liquefaction site,when the tunnel passes through local liquefiable soil,the failure position extends to the whole section of lining.Compared with the uniform excitation,under traveling wave excitation,the principal stress of lining increases,the distribution of principal stress changes,and the torsion effect bears.

关 键 词：砂土液化 区间隧道 局部液化 行波激励 

分 类 号：TU443[建筑科学—岩土工程]