长江科学院院报2018，Vol.35Issue(5)：103-109,7.DOI:10.11988/ckyyb.20161268
双排桩与单排桩组合多级支护结构在深大基坑中的应用
Application of Multi-level Retaining Structure Composed of Double-row Pile and Single-row Pile in Deep and Large Foundation Pit
摘要
Abstract
Traditional pile-bracing retaining structure is featured with many disadvantages such as high cost, long construction period,and large amount of solid waste produced by the demolishing of inner retaining structure. By a-dopting multi-level retaining structure composed of double-row pile and single-row pile,the above mentioned prob-lems are effectively solved,and good social and economic benefits are achieved. The deep foundation pit of Capital Land's Gutian project in Wuhan is taken as engineering background. Furthermore,the deformation and stability of the multi-level retaining structure are studied through finite element numerical simulation. Results conclude that the safety factor of stability and failure pattern have great correlation with the spacing between the two-level retaining piles,but have almost no concern with the height of earth berm.With the increasing of spacing between the two-lev-el retaining piles, the maximum horizontal displacement of the first and second supporting piles both decreased, while the stability of foundation pit increased. With the increasing of height of earth berm,the maximum horizontal displacement of first-level retaining decreased whereas the second-level retaining increased, and the stability of foundation pit barely changed. Finally,the ranges of spacing between the two-level retaining piles corresponding to integral destruction,relational damage and separated damage, respectively, are given for reference for foundation pit design and calculation.关键词
深基坑/双排桩/多级支护/有限元/2级支护间距/留土高度Key words
deep foundation pit/double-row pile/multi-level retaining/finite element/spacing between two-level re-taining piles/height of earth berm分类
数理科学引用本文复制引用
李松,马郧,郭运,张德乐,李受祉,刘佑祥,张晓玉..双排桩与单排桩组合多级支护结构在深大基坑中的应用[J].长江科学院院报,2018,35(5):103-109,7.基金项目
武汉市"黄鹤英才(专项)计划"资助项目(武人才[2014]10) （专项）
武汉市城建委科研项目(No.201545,武城建[2015]191) （No.201545,武城建[2015]191）
