h型抗滑桩模型试验及数值模拟  

MODEL TEST AND NUMERICAL SIMULATION OF h-SHAPED ANTI-SLIDING PILE

作　　者：欧孝夺[1,2] 唐迎春[1,2] 崔伟[1,3] 李结全[1,2] 潘鑫[1,2] 

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]广西大学工程防灾与结构安全教育部重点实验室,广西南宁530004 [3]安徽省建筑科学研究设计院,安徽合肥230001

出　　处：《岩石力学与工程学报》2012年第9期1936-1943,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(51168004);广西自然科学基金资助项目(桂科自0991056);教育部科学技术研究重点项目(210162)

摘　　要：通过几何相似比为1∶20的室内模型试验,研究h型抗滑桩的受力机制,采用千斤顶施加各级荷载,得到不同桩排距、不同连梁位置的3根h型抗滑桩弯矩及变形规律。并通过ABAQUS有限元软件建立h型抗滑桩桩–土共同作用模型,对h型抗滑桩几个设计参数进行优化计算研究,结果表明,最优桩排距为5倍桩径,最优连梁刚度为1.5倍桩体刚度,最优嵌固深度为前排桩长度的3/8。最后将该研究结论运用于南宁市一滑坡治理工程中,效果良好。Indoor experiments were carried out on models with geometric similarity of 1 ： 20 to study h-shaped anti-sliding piles mechanism. The load was applied in steps by a jack, and the moment and deformation patterns of three h-shaped anti-sliding piles with different row spacings and different beam positions were obtained. The pile-soil interaction model of h-shaped anti-sliding pile was established by finite element software ABAQUS： and several design parameters of pile were analyzed and optimized. The results show that the optimal pile row spacing is 5 times pile diameter; the optimal stiffness of connecting beam is 1.5 times of pile; the optimal embedded depth of pile is 3/8 of the length of front row pile. Finally, the conclusions were successfully applied to treatment of an actual landslide in Nanning.

关 键 词：桩基础 h型抗滑桩 工作机制 模型试验 数值模拟 

分 类 号：TU473[建筑科学—结构工程]