基于反应位移法的小直径盾构电力隧道纵向抗震分析  

Analysis of Longitudinal Seismic of Small-diameter Shield Power Tunnel Based on Response Displacement Method

作　　者：张喜 何剑平 Zhang Xi;He Jianping(Shanghai Municipal Engineering Design&Research Institute(Group)Co.,Ltd.,Shanghai 200092,China;Shanghai Waer Desigre&Engineering Co.,Ltd.,Shanghai 200092,China)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092 [2]上海水业设计工程有限公司,上海200092

出　　处：《市政技术》2021年第5期80-83,87,共5页Journal of Municipal Technology

摘　　要：结合西安市某小直径盾构电力隧道工程,沿纵向将隧道简化为连续梁,建立等价连续化模型;将环间接头简化为转动非线性弹簧和拉压异性弹簧,建立梁-弹簧模型;采用反应位移法对2种模型进行盾构隧道纵向地震反应分析。结果表明:在地震烈度8度区,小直径盾构电力隧道纵向地震响应远小于容许值,因此应重点关注接头张开量指标;等价连续化模型计算简单,但误差较大,建议采用梁-弹簧模型进行隧道纵向地震反应分析。A small-diameter shield power cables tunnel project in Xi’an is taken as an example.The tunnel is simplified to be a continuous beam along the longitudinal direction and an equivalent continuum model is established;The joint between rings is simplified to be a rotating nonlinear spring and a tension compression anisotropic spring,and the beam spring model is established;The response displacement method is used to analyze the longitudinal seismic response of the two models.The results show that:The longitudinal seismic response of small-diameter shield power tunnel is far less than the allowable value in the seismic intensity of 80 area so that the joint opening index should be focused on;Although the equivalent continuum model is simple to calculate,its error is large.The beam-spring model is suggested to analyze the longitudinal seismic response of the tunnel.

关 键 词：盾构电力隧道 反应位移法 等价连续化模型 梁-弹簧模型 纵向抗震分析 

分 类 号：U455.43[建筑科学—桥梁与隧道工程] U452.28[交通运输工程—道路与铁道工程]