豎向荷載下斜樁承載變形性狀及荷載傳遞機理試驗研究*
陸清元，曹衛(wèi)平，李升，樊文甫
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（西安建筑科技大學土木工程學院， 西安 710055）
［摘要］通過模型試驗研究了豎向荷載作用下長徑比為25時，不同傾角的斜樁的承載變形及荷載傳遞性狀，并與豎向荷載作用下的直樁的承載變形及荷載傳遞性狀進行了比較。試驗結果表明：斜樁的樁頂沉降大于直樁的樁頂沉降，斜樁樁身傾角越大，斜樁的樁頂沉降超過直樁的樁頂沉降越多；斜樁樁身軸力均小于直樁樁身軸力，斜樁樁身傾角越大，樁身軸力沿深度衰減得越快；斜樁樁身彎矩主要發(fā)生在樁體上部1/2樁長范圍內，且隨著樁身傾角的增大而增大，樁身最大彎矩出現(xiàn)的位置與樁身傾角無關。斜樁樁側平均摩阻力的分布與樁身傾角密切相關；斜樁最大樁側平均摩阻力出現(xiàn)在樁頂下約1/5樁長處。［關鍵詞］斜樁; 模型試驗; 傾角; 沉降; 軸力; 彎矩; 摩阻力中圖分類號：TU43，TU411 文獻標識碼：A 文章編號：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
*陜西省自然科學基礎研究計劃項目（2015JM5260）。作者簡介：陸清元，碩士研究生，Email：luqyuan2008@163.com。
