Stability of long trench in soft soils by bentonite-water slurry

作     者：卓弘春 杨宇友 张子新 潘春晖 段创峰 

作者机构：School of Engineering and Technology China University of Geosciences (Beijing) Department of Geotechnical Engineering School of Civil Engineering Tongji University Shanghai Urban Construction (Group) Corporation 

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9期

页      面：3674-3681页

核心收录：

学科分类：07[理学] 081401[工学-岩土工程] 08[工学] 070104[理学-应用数学] 0814[工学-土木工程] 0701[理学-数学] 

基　　金：Project(41202220)supported by the National Natural Science Foundation of China Project(20120022120003)supported by the Research Fund for the Doctoral Program of Higher Education,China Project(2652012065)supported by the Fundamental Research Funds for the Central Universities and Beijing Higher Education Young Elite Teacher Program,China 

主　　题：slurry trench soft clay stability centrifuge model test 

摘      要：A series of centrifuge model tests exploring the effects of different types of slurry on long-trench stability in soft clay were conducted. The influence of groundwater conditions relative to trench stability was examined by constructing long trenches using different slurries. The soil deformation and surface settlement induced by the excavation of the trench are found to be closely related to slurry type and excavation depth of the long trench. Increasing the bentonite concentration of the slurry has beneficial effects on stability: 1) larger particles can improve local and global stability in cases where filter cakes do not form, and 2) larger viscosity can promote filter cake formation on the walls of long trenches excavated in soft clay and enhance their stability.