毗邻大型工业建筑物的狭长型软土深基坑施工控制技术

Construction Control Technology for Long-Narrow Type Soft Soil Deep Foundation Pit Adjacent to Large Industrial Building

基坑开挖易引起周边建筑物产生附加变形,狭长型基坑更由于支撑结构体系缺乏整体性,导致施工存在较大风险。结合上海龙耀路越江隧道浦西段明挖工程实例,针对狭长型深基坑施工及周边大型建筑物各自的特点,制订了一系列的保护措施,有效控制了深基坑变形及周边大型建筑物的沉降。工程实施整体效果良好,为后续工程提供了理论依据并积累了经验。

Foundation pit excavation usually causes additional deformation of surrounding buildings. Long-narrow type foundation pit will bring about larger risk due to lack of integrity because of support structure system. Taking the open excavation project of cross-river tunnel Puxi section on Shanghai Longyao Road as an example, as well as based on respective features of long-narrow type deep foundation pit construction and surrounding large buildings, a series of protective measures have been formulated which effectively control the deformation of deep foundation pit and the settlement of surrounding large buildings. The overall effect of engineering practice is good, which can provide theoretical basis and accumulate experience for future projects.