预应力-悬臂排桩组合支护结构空间变形的应用研究  

Applied Research on Spatial Deformation of Prestress-cantilever Soldier Piles Combination Technique

作　　者：高妍妍[1] 刘剑雄[1] 李秀华[1] 岳晨曦[1] 

机构地区：[1]淮阴工学院建筑工程学院,江苏淮安223001

出　　处：《施工技术》2016年第13期55-58,共4页Construction Technology

基　　金：淮安市产学研合作促进计划项目(HC201208)

摘　　要：通过使用钢绞线部分替代排桩中受拉钢筋,基坑开挖前张拉钢绞线使得排桩支护体系获得减小水平位移的偏心预压力,形成预应力-排桩组合技术的新型支护结构。利用势能驻值条件中总势能的一阶变分为0的原理,计算支护结构最大变形。在实际工程中同时应用组合技术和普通排桩进行基坑支护。理论计算和工程实测数据表明,预应力-排桩组合技术的支护结构可以有效减少空间变形。Using the strand partly replace tensile reinforcement of the piles.Then prior to foundation excavation,the pre-charge pressure which can reduce lateral displacement of the cantilever soldier piles was got by tension steel strand.That was prestress-cantilever soldier piles combination technique.Getting the deformation of supporting structure on the basis of the first-order derivative equal to zero of total potential energy,the combination technique and cantilever soldier pile at the same time were used in the strutting system of deep foundation excavation of a practical engineering.The theoretical calculation and the measured data shows that the retaining structure of prestress-cantilever soldier piles combination technique can effectively reduce the spatial deformation.

关 键 词：基坑 支护 预压力-悬臂排桩 变形 

分 类 号：TU753[建筑科学—建筑技术科学]