作　　者： ; ; ; ;

机构地区： 北京工业大学建筑工程学院

出　　处： 《工业建筑》 2004年第9期8-11,共4页

摘　　要： 利用国际通用岩土工程分析软件FLAC ,通过数值模拟的方法研究了双排桩在分步开挖情况下的力学响应 ,从双排桩排距及桩的嵌入深度两个方面 ,对双排桩围护结构的工作特性进行了分析讨论。研究表明 :当排距s<4d(d为桩直径 )时 ,门架空间效应差 ;s >8d时 ,门架空间效应也差 ,联系梁起拉杆作用 ,前后排桩距的合理范围为 4d～ 8d。随嵌入深度加大 ,桩的位移减小 ,但同时桩的内力增大。 The mechanical response of double row pile under step excavation is studied through numerical simulation and using general international geotechnical analytic software FLAC;and the working characteristics of the double- row pile retaining system are discussed according to the distance between two rows and the insertion depth of a pile.The study shows that the space effect of a portal frame will be poor if the distance between two rows,s<4d(d is the diameter of the pile).When s> the space effect of the portal frame is also poor with a tie beam acting as a tie bar.The rational range of the distance between two rows is 4d～8d.The displacement of a pile is decreased and its internal force is increased with increasing the insertion depth of the pile.

关 键 词： 双排桩 围护结构 架空 桩距 内力 岩土工程 空间效应 分步开挖 力学响应 工作特性

领　　域： [建筑科学] [建筑科学] [建筑科学]