中山大学学报（自然科学版）Issue(1)：135-140,6.
支护结构平移时的坑中坑被动区土拱效应分析
Analysis of Soil Arching Effects in Pit-in-pit Passive Zone as Supporting Structure Parallel Movement
摘要
Abstract
Due to the lack of a clear definition for some key parameters in engineering design specifica-tions,the wrong estimation of earth pressure produced by the inner pit excavation often results in acci-dents.The existing researches of earth pressure in the passive zone of pit-in-pit have not considered the soil arching effects,which widely exist in geotechnical engineering.As a result,an accurate analysis on passive earth pressure is impossible.In this paper,an earth pressure mechanical model of cohesionless soil is established by presuming the inner pit support structure with large stiffness and very close to the outer pit support structure.Coefficient of earth pressures and the large principal stress rotation angle are obtained by analysing the horizontal earth pressure between two pit supporting structures at a limit state based on soil arching effects,and then the theoretical formulae and the force point are obtained.The case study shows that this method can better reflect the actual situation by analysing horizontal differential ele-ments comparing to the classical earth pressure theory.关键词
坑中坑/被动土压力/土拱效应Key words
pit-in-pit/passive earth pressure/soil arching effects分类
建筑与水利引用本文复制引用
胡辉,汤连生,林兴立,桑海涛..支护结构平移时的坑中坑被动区土拱效应分析[J].中山大学学报（自然科学版）,2014,(1):135-140,6.基金项目
国家自然科学基金资助项目（40872205）；全国高等学校博士学科专项科研基金资助项目（20120171110031）；广东省自然科学基金资助项目（07003738，S2012040007331）；广东省科技计划（2008B030303009）资助项目 （）
