【摘要】 深基坑开挖对邻近建筑物的变形和安全有着重要的影响,然而,深基坑自身安全开挖却导致邻近建筑群变形损坏的工程实录却并不多见。为此,结合某高档综合楼12 m深基坑开挖工程施工过程的现场监测结果,分析了深基坑开挖导致邻近11幢建筑物的沉降变形发展过程,及其与地基条件、基坑开挖施工工序、支护结构水平位移、建筑物基础型式之间的关系。结果表明,深厚的淤泥质粉质黏土夹粉砂地基及基坑降水是诱发6幢建筑物产生超过100 mm沉降变形而损坏的根本原因,有效的止水帷幕和降水措施是控制该类地基深基坑开挖工程对邻近建筑物影响的关键。更多还原

【Abstract】 Deep excavation has an important impact on the deformation and safety of its adjacent buildings.However,very limited case histories on damage of adjacent buildings caused by a safely constructed deep excavation are available.Field monitoring is carried out during the construction of a 12 m-deep excavation for the foundation of a luxury complex building.The settlement deformations of 11 adjacent buildings caused by the deep excavation are analyzed.Also investigated are the settlement-related ground conditions,construction process of the deep excavation,lateral displacements of retaining structures,and foundation types of the adjacent buildings.It is shown that the ground conditions,namely a thick mucky silty clay containing silty sand,and dewatering are the underlying causes leading to damage of 6 buildings with settlements over 100 mm.An effective water-resisting curtain and dewatering measures are the key to control the influence of deep excavation on the adjacent buildings.更多还原