地震荷载作用下公路隧道衬砌位移及振动特征研究  

Study on Lining Displacement and Displacement of Road Tunnel under Earthquake

作　　者：王鹏 

机构地区：[1]山西省交通规划勘察设计院,太原市030012

出　　处：《公路》2014年第5期37-41,共5页Highway

摘　　要：利用FLAC3D对地震荷载作用下某隧道衬砌在不同埋深情况下的位移、振动速度变化特征及规律进行了详细的动力分析,结果表明:(1)在地震荷载作用下,公路隧道衬砌拱顶与拱底竖向位移及竖向振动速度响应随埋深增大而增加,因此,在底部受地震荷载作用下隧道浅部的竖向位移响应小于深部;(2)在地震荷载作用下,公路隧道衬砌拱顶与拱底水平位移及水平方向振动速度响应随埋深增大而减小。The analysis of tunnel lining under earthquake is made with FLAC3D in this paper. Features and regulations of displacement and vibrations speed variation under different bury depth are detailed analyzed. The results show that under earthquake loads. （1） the vertical displacement and vertical shaking response on both the crown and bottom of lining decrease with the increasing of overburden, hence the vertical displacement for shallow parts is smaller than that of deep buried~ and （2） both horizontal displacement and horizontal shaking speed response both on crown and bottom of lining decrease with increase of the bury depth. The present work could be used as a primary guidance to the aseismic design for underground cavern.

关 键 词：地震荷载 公路隧道 位移特征 FLAC 

分 类 号：U452.28[建筑科学—桥梁与隧道工程]