穿风化槽山岭隧道地震响应分析  

Analysis of Seismic Responses of Mountain Tunnels Passing through Weathered Ditch

作　　者：潘玉涛[1] 郑俊杰[1] 章荣军[1] 申俊敏 

机构地区：[1]华中科技大学岩土与地下工程研究所,武汉430074 [2]黄土地区公路建设与养护技术交通行业重点实验室,太原030006

出　　处：《防灾减灾工程学报》2013年第3期269-274,289,共7页Journal of Disaster Prevention and Mitigation Engineering

基　　金：新世纪优秀人才支持计划项目(NCET-06-649);山西交通建设科技项目(10-2-13)资助

摘　　要：为探讨水平地震荷载激励下穿越风化槽山岭隧道衬砌结构的动力响应规律,建立三维有限差分模型进行非线性动力时程分析,并对比分析了不同风化槽土性参数条件下衬砌结构的动力响应峰值;然后,着重论述了风化槽与隧道横断面倾角对隧道结构物地震动力响应的影响;最后,分析了注浆加固层参数与二次衬砌参数对隧道结构内力峰值的影响。结果表明:风化槽倾角的增大有利于位移响应的减小,在倾角增大到某个值时,二次衬砌内力峰值可以达到最小;风化槽模量的增加会使衬砌内力增大;注浆层模量的增大在一定程度上有助于隧道衬砌内力峰值及振幅的减小;二次衬砌模量的增大会显著增加隧道的内力峰值及内力波动幅度。To investigate the influence laws of seismic excitation on tunnel structures passing through a weathered ditch, a threedimensional elastoplastic numerical simulation modet is established and a time history nonlinear analysis is performed. Then a parametric study is conducted to compare the peak values of dynamic responses of liners under different conditions of the properties of the weathered ditch. And the influence of angle between the weathered ditch and the tunnel transection on the seismic responses of tunnel structures is investigated. Finally, the effects of property of grouting layer and secondary liner on the peak values of structure internal forces are studied. The results show that increasing the ditch angle is helpful in reducing the displacement of ground. The peak values of internal forces of secondary liner can be minimized by setting the ditch angle to a certain value. The internal force of liners increases as the modulus of the weathered ditch increases. The increasing modulus of grouting layer to some extent diminishes the internal force of liners. When the modulus of secondary liner increases, both the peak values and amplitude of fluctuation of internal force increase.

关 键 词：山岭隧道 风化槽 地震响应 有限元计算模型 

分 类 号：U457[建筑科学—桥梁与隧道工程]