An improved Mesri creep model for unsaturated weak intercalated soils

作     者：祝艳波 余宏明 ZHU Yan-bo;YU Hong-ming

作者机构：Faculty of Engineering China University of Geosciences College of Geology Engineering and Geomatics Chang’an University 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2014年第21卷第12期

页      面：4677-4681页

核心收录：

学科分类：08[工学] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Project supported by Science&Technology Program of Hubei Traffic and Transport Office,China Project(41272377)supported by the National Natural Science Foundation of China 

主　　题：unsaturated soils creep matric suction improved Mesri model 

摘      要：The weak intercalated soils in redbed soft rocks of Badong formation have obvious creep characters. In order to predict the unsaturated creep behaviors of weak intercalated soils, an unsaturated creep model was established based on the unsaturated creep tests of weak intercalated soils by using GDS triaxial apparatus. The results show that the creep behaviors of intercalated soils are apparent and significantly affected by matric suction. Based on this, an empirical Mesri creep model for intercalated soils under varying matric suctions was built. The fitting results show that the parameters Ed and m of this model are in good power relations with matric suction s and stress level Dr, respectively. An improved Mesri creep model was established involving stress-matric suction-strain-time, which is more precise than the Mesri creep model in predicting the unsaturated creep behaviors of weak intercalated soils.