Electrical resistivity change of saturated sand during reliquefaction under hammering loading  

作　　者：Wang Binghui Xiao Xing Zhang Lei Wang Liyan Jin Dandan 

机构地区：[1]Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China [2]School of Civil Engineering and Architecture,Jiangsu University of Science and Technology,Zhenjiang 212000,China [3]Institute of Geotechnical Engineering,Nanjing Tech University,Nanjing 210000,China [4]Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang 212013,China

出　　处：《Earthquake Engineering and Engineering Vibration》2023年第3期613-622,共10页地震工程与工程振动（英文刊）

基　　金：Scientific Research Fund of the Institute of Engineering Mechanics,China Earthquake Administration under Grant No.2019D04;the National Natural Science Foundation of China under Grant No.51978317;Natural Science Foundation of Jiangsu Province under Grant No.BK20200996;the China Postdoctoral Science Foundation under Grant No.2020M681566。

摘　　要：The electrical resistivity method was verified as an optional technique to monitor the change of mesostructure of saturated soils.To investigate the change laws of resistivity and analyze the reliquefaction meso-mechanism during the consecutive liquefaction process,five successive impact liquefaction tests were performed in a one-dimensional cubical chamber.The resistivity variation and excess pore water pressure(EPWP)were measured.The results indicate that the excess pore water pressure experienced four stages:quick increase stage,slow dissipation stage,rapid dissipation stage,and stability stage.Meanwhile,a swift decrease of resistivity emerged before the start of the rapid dissipation stage of EPWP,and then an increasing trend of resistivity is demonstrated with the densification of soil.It is proved that the vertical pore connectivity of liquefied sand is better than its random deposit state,based on a comparative study of porosity calculated from the settlement and resistivity of sand after each test.

关 键 词：SAND reliquefaction RESISTIVITY excess pore water pressure MESOSTRUCTURE 

分 类 号：TU435[建筑科学—岩土工程]