倾斜单排桩在水平荷载作用下的性状研究  

Behaviors study of inclined single row contiguous retaining piles under horizontal force

作　　者：郑刚[1] 白若虚[1] 

机构地区：[1]天津大学土木工程系,天津300072

出　　处：《岩土工程学报》2010年第S1期39-45,共7页Chinese Journal of Geotechnical Engineering

基　　金：天津市科技创新专项资金项目(07FDZDSF01200)

摘　　要：用适当角度的倾斜单排桩代替竖直单排桩作为基坑支护结构,可起到减小排桩位移和内力的作用。通过模型试验的方法对基坑开挖过程中单排悬臂倾斜支护排桩的桩顶水平位移、桩后土体沉降和桩身弯矩进行了测量。本试验共进行5组模型试验,对比相同排桩桩距时,采用不同倾角和不同布置形式下单排桩的工作性状,分析了倾斜单排桩和斜直交替桩的位移弯矩随倾斜角度变化而变化的规律。研究结果表明,同等条件下,倾斜单排桩的抗倾覆能力优于竖直单排桩;随着排桩倾斜度增加,桩身最大水平位移和桩身最大弯矩均逐渐减小。同等条件下,倾斜垂直交替布置的单排桩的工作性状更优于倾斜单排桩。Inclined single row contiguous retaining pile of appropriate angle can be used as retaining structure to minimize the deformation and internal forces.Model tests are carried out to measure the displacements at top of inclined piles,the soil settlements behind the piles and bending moments in the pile bodies at different depths during the whole excavation process,the tests consist of five groups of experiments.Compared under the same pile space,the working behaviors of single row piles at different angles and arrangements are analyzed.The variation rules of displacements and bending moments along with change of angles are concluded.The test results show that the inclined piles have better anti-overturning ability than the vertical piles under the same conditions,and the largest horizontal displacements and bending moments gradually decrease with the increase of angles.

关 键 词：基坑 支护结构 倾斜单排桩 水平位移 抗倾覆 

分 类 号：TU473.1[建筑科学—结构工程]