Seismic responses of slopes with different angles in coral sand

作     者：ZHANG Yan-ling DING Xuan-ming CHEN Zhi-xiong WU Qi WANG Cheng-long ZHANG Yan-ling;DING Xuan-ming;CHEN Zhi-xiong;WU Qi;WANG Cheng-long

作者机构：College of Civil EngineeringTaiyuan University of TechnologyTaiyuan 030024China College of Civil EngineeringChongqing UniversityChongqing400045China Key Laboratory of New Technology for Construction of Cities in Mountain AreaChongqing UniversityChongqing400045China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2021年第18卷第9期

页      面：2475-2485页

核心收录：

学科分类：07[理学] 0708[理学-地球物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.41831282,51878103) the Fundamental Research Funds for the Central Universities(Grant No.2021CDJQY-042) the Postdoctoral innovative talents support program,Chongqing 

主　　题：Coral sand Slope angle Shaking table tests Seismic response Liquefaction 

摘      要：This paper investigates the seismic responses of slopes in coral sand taken from a reef island in the South China Sea.A series of shaking table model tests were conducted to explore the responses of soil acceleration,excess pore pressure,and slope displacement for three slope angles(5°,10°,and 15°).The results show that the excess pore pressure ratio of the slope decreases due to an increase in the initial shear stress when the slope angle *** acceleration response of the soil increases with the increase of the slope *** slope displacement presents substantial increments as the excess pore pressure ratio *** addition,the lateral movement,and slope settlement present substantial increments as the slope angle *** liquefaction is observed under a dynamic excitation of 0.2 g in the coral sand *** a dynamic excitation of 0.4 g,the site liquefies quickly,the acceleration amplification factor decreases,and the lateral movement and the settlement of the slope surface both increase compared with that under 0.2 g *** the slope with an angle of 15°at 0.4 g,the flow distance of the sand strip increase by 289.47%compared with that in the 5°*** lateral movement of the slope surface near the water level line is substantially larger than that away from the water *** largest settlement is observed near the middle section of the slope(below the water level)under a dynamic excitation of 0.2 *** contrast,the largest settlement under a dynamic excitation of 0.4 g occurs at the top of the slope.