【作者】 刘红军； 高艳； 谭长伟；

【Author】 LIU Hongjun~(①②) GAO Yan~②TAN Changwei~③(①Key Lab of Marine Environmental Science and Ecology,Ministry of Education,Ocean University of China,Qingdao 266100) (②College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100) (③Qingdao Geotechnical Investigation and Surveying Research Institute,Qingdao 266032)

【机构】 海洋环境与生态教育部重点实验室中国海洋大学； 中国海洋大学环境科学与工程学院； 青岛市勘察测绘研究院；

【摘要】 逆作法施工是近几年应用比较多的施工方法,但在"土岩"二元结构下,这种支护方式的设计与施工经验较少。青岛市是典型的土岩二元结构地层地区,以东海路基坑掩蔽工程为例,介绍基坑开挖深度范围内含有土层和岩层的二元结构地层条件下,逆作法同钻孔灌注桩相结合的支护形式,重点介绍利用Plaxis有限元分析模拟基坑开挖过程中跃层开挖土体对支护桩变形的影响,通过模拟计算讨论跃层开挖土体的可能性,及其对施工的影响。更多还原

【Abstract】 In recent years,top-down constrction method has become popular in construction of deep foundation pits.But in the region of "soil-rock" dualistic structure,successful cases of design and construction experiments of this kind of construction are rarely seen.In this paper,the deep foundation pit near Donghai Road was taken as an example to introduce the construction process and main construction methods of top-down construction method with bored pile supporting pattern in a typical region of "soil-rock" dualistic structure like Qingdao,when there are soil and rock field in the excavate effected extent.The Plaxis finite element software was applied to simulate soil excavation in order to analyze the effect of deformation of the supporting construction influenced by the depth of soil excavate and tney were stressed analysed to disscuss the feasibility of jump-layer excavation and the influence to the construction process.更多还原