竖向荷载下斜桩承载变形性状及荷载传递机理试验研究*
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（西安建筑科技大学土木工程学院， 西安 710055）
［摘要］通过模型试验研究了竖向荷载作用下长径比为25时，不同倾角的斜桩的承载变形及荷载传递性状，并与竖向荷载作用下的直桩的承载变形及荷载传递性状进行了比较。试验结果表明：斜桩的桩顶沉降大于直桩的桩顶沉降，斜桩桩身倾角越大，斜桩的桩顶沉降超过直桩的桩顶沉降越多；斜桩桩身轴力均小于直桩桩身轴力，斜桩桩身倾角越大，桩身轴力沿深度衰减得越快；斜桩桩身弯矩主要发生在桩体上部1/2桩长范围内，且随着桩身倾角的增大而增大，桩身最大弯矩出现的位置与桩身倾角无关。斜桩桩侧平均摩阻力的分布与桩身倾角密切相关；斜桩最大桩侧平均摩阻力出现在桩顶下约1/5桩长处。［关键词］斜桩; 模型试验; 倾角; 沉降; 轴力; 弯矩; 摩阻力中图分类号：TU43，TU411 文献标识码：A 文章编号：1002-848X(2016)08-0079-04
Experimental study on bearing deformation and load transfer behavior of inclined piles under vertical loadsLu Qingyuan, Cao Weiping, Li Sheng, Fan Wenfu（College of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China）Abstract: A series of model tests were conducted to explore the bearing deformation and load transfer behavior of inclined piles with length-diameter ratio of 25 and different inclined angles subjected to vertical loads, and the results were compared with those of vertical piles subjected to the same vertical loads. The test results show that the top settlement of inclined pile is greater than that of vertical pile, and the larger the inclined angle of the inclined pile is, the greater the settlement is for the inclined pile than vertical pile. The axial force of inclined pile is less than that of vertical pile, and the larger the inclined angle of the inclined pile is, the faster the decay rate of the axial force is along the deep. The bending moment of inclined pile mainly occurs in the upper 1/2 part of pile length, and the bending moment increases with the increase of inclined angle. The location where the maximum bending moment occurs is not associated with the inclined angle. The average skin friction of inclined pile is closely related to the inclined angle. The maximum average skin friction of inclined pile always occurs at the location of 1/5 pile length below the pile head.Keywords: inclined pile; model test; inclined angle; settlement; axial force; bending moment; skin friction
*陕西省自然科学基础研究计划项目（2015JM5260）。作者简介：陆清元，硕士研究生，Email：luqyuan2008@163.com。
