Ground motion amplification pattern with TBM tunnels crossing soil-rock interface:Shaking table test
作者机构：College of Civil EngineeringTongji UniversityShanghai 200092China Department of Civil and Environmental EngineeringTechnical University of MunichMu¨nchen 81245Germany China Railway Siyuan Survey and Design Group Co.Ltd.Wuhan 430063China Public Works Construction CenterNanjing 210019China State Key Laboratory of Disaster Reduction in Civil EngineeringTongji UniversityShanghai 200092China
出 版 物：《Underground Space》 (地下空间（英文）)
年 卷 期：2023年第12卷第5期
页 面：202-217页
核心收录：
学科分类：081406[工学-桥梁与隧道工程] 08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程]
基 金：supported by the National Natural Science Foundation of China(Grant Nos.51778487&51478343) Joint Funds of the National Natural Science Foundation of China(Grant No.U1934210) National Natural Science Foundation of China Projects of International Cooperation and Exchanges(Grant No.52061135112)
主 题：Tunnel Soil-rock interface Seismic excitation Ground response Site characteristics
摘 要：The current aseismic design has seldom considered the effect caused by underlain *** studies focused on the scenarios of tunnels embedded in homogeneous soil under transverse seismic *** paper aims to investigate the tunnel effect on the surface acceleration response in soil-rock strata by shaking table *** sets of excitations are employed and input along the shaking table in both transverse and longitudinal *** soil-rock site is classified as four micro-zones with varying conditions,to mount observation stations of acceleration *** characteristics of the four zones are identified by the transfer function(TF)method,and the tunnel effect on the ground acceleration response is obtained by comparing the spectral acceleration results between the free-field and ground-tunnel *** test results indicate that the tunnel effect varies with the site ***,a significant amplification effect is observed at the A4 zone,located on the soil deposit near the soil-rock ***,it is proved that the scattering waves generated at the interface and the standing waves trapped between the tunnel and upper ground surface account for the amplification,revealed by the discrepancies of the TF results and acceleration details between the free-field and ground-tunnel models.
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