Creep behavior of EPS composite soil  

作　　者：GAO HongMei CHEN YuMin LIU HanLong LIU JinYuan CHU Jian 

机构地区：[1]Institute of Geotechnical Engineering, Nanjing University of Technology, Nanjing 210009, China [2]Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China [3]Geotechnical Research Institute, Hohai University, Nanjing 210098, China [4]Department of Civil Engineering, Ryerson University, 350 Victoria Street, Toronto, ONM5B2k3, Canada [5]School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore

出　　处：《Science China(Technological Sciences)》2012年第11期3070-3080,共11页中国科学（技术科学英文版）

基　　金：supported by the Natural Science Foundation of Jiangsu Province,China (Grant No. BK2008040);National Natural Science Foundation of China (Grant No. 51109107);China Postdoctoral Science Foundation (Grant No. 2012M5112)

摘　　要：EPS composite soil is one type of premixed lightweight fills studied by numerous researchers, However, one aspect that has not been fully understood is the creep behaviors which may have significant effect on the design and application of EPS com- posite soil. In this paper, the results of a series of oedometer creep tests and triaxial undrained creep tests on EPS composite soil were presented. Four main influencing factors were identified and their effects on the creep behaviors of EPS composite soil were studied. Three well established creep models, namely, Findley model, Singh ＆ Mitchell model, and Mesri model, were used to simulate the creep behavior of EPS composite soil. This study shows that the Findley creep model fits the test re- suits the best. A semi-empirical creep model was also proposed to model the creep behavior under axisymmetric conditions. In this model, the creep strain was divided into instant and viscous elastic strain as well as instant and viscous plastic strain which were simulated by element models and empirical equations, respectively. It was shown that the proposed creep model was able to precisely predict the creep strain of EPS composite soil.

关 键 词：lightweight fill creep model empirical model EPS composite soil oedometer creep test triaxial undrained creep test 

分 类 号：TQ342.72[化学工程—化纤工业] TU432[建筑科学—岩土工程]