长江科学院院报2017，Vol.34Issue(3)：58-62,66,6.DOI:10.11988/ckyyb.20151123
坑中坑土体加固对悬臂式支护结构的影响分析
Influence of Pit-in-pit Soil Reinforcement onCantilever Retaining Structure
摘要
Abstract
Soil reinforcement is often used to reduce the lateral deformation of retaining structure in foundation pitprojects.In order to study the influence of pit-in-pit soil reinforcement on cantilever retaining structure, we established an elasticity-plasticity calculation model for soil reinforcement of pit-in-pit by using ABAQUS and discussed the effects of depth, width, stiffness, location and size of reinforcement body on retaining structures of inner pit and outer pit.Calculated results show that 1) there is an optimum interval for the values of depth, width, and stiffness of passive reinforcement zone respectively, beyond which the reinforcement effect on retaining structure of pit will be not obvious;2)for pit-in-pit, the effect of stepped reinforcement in the passive zone of outer pit could reach that of full-size soil reinforcement, hence is more economic;3)when reinforcement width and reinforcement depth of each step are approximately equal, the reinforcement effect is good.Finally, the research results can be taken as reference for pit-in-pit retaining structure in actual projects.关键词
坑中坑/悬臂式支护结构/被动区加固/ABAQUS有限元软件/围护结构/阶梯加固Key words
pit-in-pit/cantilever retaining structure/reinforcement at passive zone/ABAQUS/retaining structure/stepped reinforcement分类
建筑与水利引用本文复制引用
江杰,胡何,冯野,马少坤,刘莹..坑中坑土体加固对悬臂式支护结构的影响分析[J].长江科学院院报,2017,34(3):58-62,66,6.基金项目
国家自然科学基金项目 (51568006,41362016) （51568006,41362016）
广西重点实验室系统性研究项目资助(2016ZDX11) （2016ZDX11）
广西岩土力学与工程重点实验室资助课题(14KF03,13KF02) （14KF03,13KF02）
广西科技厅岩土与地下工程创新团队项目(2016GXNSFGA380008) （2016GXNSFGA380008）
