Shaking table tests on the liquefaction-induced uplift displacement of circular tunnel structure

作     者：Saber Nokande Yaser Jafarian Abdolhosein Haddad 

作者机构：Department of Civil EngineeringSemnan UniversitySemnan 35131-19111Iran International Institute of Earthquake Engineering and Seismology(IIEES)Tehran 19537-14453Iran DeltaresBoussinesqweg 1DelftSouth Hollands 2629 HVNetherlands 

出 版 物：《Underground Space》 (地下空间（英文）)

年 卷 期：2023年第10卷第3期

页      面：182-198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：Department of Civil Engineering Semnan University, SU 

主　　题：Liquefaction Tunnel uplift Underground structures Shaking table test Circular tunnel 

摘      要：Underground structures are susceptible to float and move upward during earthquakes when located in a liquefiable soil *** are examples of this phenomenon in past major earthquake *** this study,the uplift of circular tunnels in a liquefiable sand layer was investigated with a series of shaking table *** research has focused on the buried depth of the tunnel,tunnel diameter,tunnel weight,liquefaction extent,uplift mechanism,and factor of safety against liquefaction-induced *** to the test results,the shallow buried depth,larger diameter,and lower weight can intensify the tunnel uplift,so the displacement in post-liquefaction time continues at the same rate as during the shaking *** to the shear-induced dilation,pore water pressure generation around the tunnel was reduced compared with that of the free *** excess pore water pressure dissipation in the soil overlying the uplifted tun-nel was significant,which leads to suction in the soil ***,the acceleration response of overlying soil with the uplifted tunnel was similar to that of the free ***,the soil acceleration response around the tunnel without uplift was similar to the base motion.