上拔力-水平力-扭矩组合荷载作用下斜桩承载特性模型试验  

Model test on bearing behavior of batter piles under the combined action of uplift,horizontal and torque loads

作　　者：曹卫平[1,2] 石玉斌 高帅鹏 CAO Weiping;SHI Yubin;GAO Shuaipeng(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]陕西省岩土与地下空间工程重点实验室,陕西西安710055

出　　处：《水资源与水工程学报》2022年第6期145-150,共6页Journal of Water Resources and Water Engineering

基　　金：陕西省自然科学基础研究计划一般项目(2019JM-006)。

摘　　要：斜桩广泛应用于桥梁、水上钻井平台及风力发电基础等工程中,其承载特性十分复杂。为揭示上拔力-水平力-扭矩共同作用下斜桩单桩的承载特性,利用自主设计制作的加载设备,在砂土地基中开展了4根斜桩室内模型试验,研究了桩身倾角、上拔及水平荷载对受扭斜桩桩顶水平位移、扭转角及桩身扭矩、弯矩的影响。试验结果表明:斜桩水平承载力随桩身倾角的增大而增大;倾角及上拔荷载的增大均会导致斜桩极限扭转承载力的减小;斜桩最大弯矩受到桩身倾斜角度及桩顶上拔荷载的影响,随其增加而增加;组合荷载作用下的斜桩存在有效荷载传递深度。Batter piles are widely used in bridges,offshore drilling platforms and foundations of wind power projects,and their bearing characteristics are very complex.In order to reveal the bearing characteristics of single batter piles under the combined action of uplift force,horizontal force and torque,a laboratory physical model test of four batter piles in sandy soil foundation was carried out using a self-designed loading equipment,with which the influences of pile inclination angle,uplift and horizontal loads on the horizontal displacement,torsion angle,torque and bending moment of the piles were studied.The experimental results show that the horizontal bearing capacity of the batter piles increase with the increase of the pile inclination angle;the increase of the inclination angle and uplift load will lead to the decrease of ultimate torsional bearing capacity of the batter piles;the maximum bending moment of the batter piles increase with the increase of the pile inclination angle and uplift load;the combined loads can only transfer effectively to a certain depth for batter piles.

关 键 词：斜桩 承载特性 组合荷载 桩身倾角 模型试验 

分 类 号：TU473.11[建筑科学—结构工程] TV223[建筑科学—土工工程]