【作者】 赵斌； 仇文革； 章慧健；

【Author】 ZHAO Bin~(1,2),QIU Wen-ge~(1,2),ZHANG Hui-jian~(1,2) 1 MOE Key Laboratory of Transportation Tunnel Engineering,Southwest Jiaotong University,Chengdu 2 School of Civil Engineering,Southwest Jiaotong University,Chengdu

【机构】 西南交通大学交通隧道工程教育部重点实验室； 西南交通大学土木工程学院；

【摘要】 不同埋深条件下,隧道衬砌的地震响应差异很大,一般认为埋深越大,影响越小,但其影响程度和影响范围尚缺乏系统的分析和研究,本文采用FLAC3D软件,利用汶川卧龙地震波,以V级围岩条件下双线铁路隧道为例,分析了不同埋深时,隧道衬砌的内力、应力、位移的响应,研究表明:埋深在10倍洞径内时,埋深对于隧道衬砌结构的动力响应影响很大;埋深在20倍洞径以上时,埋深对衬砌结构的动力响应影响很小,且衬砌动力放大系数基本趋近于1.0。更多还原

【Abstract】 Under different depth conditions,the seismic response of mountain tunnel varies widely, it is generally considered that deeper depth has letter effect,but the degree and the extent of its impact is still lack of system analysis and research.Using the Wenchuan Wolong seismic waves, this paper analyzes the internal force and stress and displacements of double track railway tunnel lining with V-class surrounding rock in different depth utilizing FLAC3D software,the results show that within 10 times of tunnel diameters,the depth has great impact on the seismic response of tunnel structure,but when it exceeds 20 times,the depth has little impact on the seismic response of tunnel structure,in addition,the dynamic magnification factor of lining approaches 1.0.更多还原