土岩组合地区建筑物超载施加方式对基坑开挖变形影响研究  

INVESTIGATION ON EXCAVATION INDUCED DEFORMATION OF FOUNDATION PIT WITH DIFFERENT ACTING METHOD OF OVERLOADING OF BUILDINGS IN ROCK-SOIL MIXED AREA

作　　者：闫楠[1] 王荃迪 刘小丽[1] 彭晶[1] 

机构地区：[1]中国海洋大学环境科学与工程学院,山东青岛266100

出　　处：《建筑技术开发》2015年第6期58-62,共5页Building Technology Development

摘　　要：以土岩组合地区的基坑开挖工程为例,对基坑一侧存在建筑物超载的情况,通过有限元模拟,对比分析了2种不同的超载施加方式对基坑开挖变形的影响。结果表明,建筑物超载施加方式对近荷载侧的基坑开挖变形影响显著,通过均布荷载施加方式计算得到的基坑变形相对较大;建筑物超载的作用深度对计算结果的影响明显;采用建筑物模型施加超载的方式更为合理。进一步对超载施加方式影响基坑开挖变形的作用机制进行了分析。Taking a foundation pit in rock-soil mixed area as a case, considering adjacent buildings on one side of the foundation pit, influences on excavation-induced deformation by different acting method of overloading of bu!ldings has been analyzed using finite element method. The results have shown that different acting method of overloading of buildings has important influences on deformation of the foundation pit near the buildings and the deformation is greater with the distributed loading method; the location depth of overloading has obvious influence on the computed deformation; it is more applicable to account for overloading of buildings by the geometry model method. Furthermore, the mechanism of acting method of overloading of buildings influencing deformation of the foundation pit has been discussed.

关 键 词：超载 基坑开挖 围护结构 地表沉降 

分 类 号：TU433[建筑科学—岩土工程]