Investigation of the overconsolidation and structural behavior of Shanghai clays by element testing and constitutive modeling
作者机构：Department of Civil Engineering and State Key Laboratory of Ocean EngineeringShanghai Jiao Tong UniversityShanghai 200240China Department of Geotechnical EngineeringTongji UniversityShanghai 200092China
出 版 物：《Underground Space》 (地下空间（英文）)
年 卷 期：2016年第1卷第1期
页 面：62-77页
核心收录：
学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学]
基 金：National Nature Science Foundation of China National Aerospace Science Foundation of China, (41372284)
主 题：Shanghai clays Laboratory tests Constitutive model Overconsolidation Structure
摘 要：The mechanical properties and constitutive modeling of Shanghai clays are very important for numerical analysis on geotechnical engineering in Shanghai,where continuous layers of soft clays run 30-40 m *** clays are divided into 5 major layers.A series of laboratory tests are carried out to investigate their mechanical *** top and bottom layers are overconsolidated hard clays,and the middle layers are normally consolidated or lightly overconsolidated sensitive marine clays.A constitutive model,which can describe the overconsolidation and structure of soils using only 8 parameters,is modified to simulate the test results.A rational procedure to determine the values of the material parameters and initial conditions is also *** model is able to effectively reproduce both one-dimensional(1D)consolidation and drained/undrained triaxial test results of Shanghai clays,with one set of parameters for each *** element testing and constitutive modeling,two findings are ***,the decay rates of overconsolidation are smaller in overconsolidated layers than in normally consolidated ***,the natural microstructure of layer 4 is relatively stable,that is,a large degree of structure is still maintained in the specimen even after 1D consolidation and drained triaxial *** modified model and obtained parameter values can be used for numerical analysis of geotechnical projects in Shanghai.
维普期刊数据库