基于有效桩长的超长抗拔桩选型优化  

Optimal design of effective pale's length-based super-long uplift grouting piles

作　　者：陶祥令[1,2] 马金荣[1,2] 张成银[1,2] 安景波 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116 [2]中国矿业大学力学与建筑工程学院,江苏徐州221116 [3]上海民防地基勘察院,上海200232

出　　处：《黑龙江科技学院学报》2010年第6期450-453,共4页Journal of Heilongjiang Institute of Science and Technology

基　　金：国家自然科学基金项目(51009135)

摘　　要：针对目前超长抗拔桩选型偏于经验的情况,结合上海软土地区某桩基工程,采用优化双曲线数学模型模拟桩顶位移曲线,并从有效桩长的角度优化超长抗拔桩选型。结果表明:超长桩承载力设计值受有效桩长影响,超过有效桩长的设计是不经济的。软土地区超长抗拔桩的最优选型是桩侧注浆直桩。该研究考虑了桩身发挥深度的影响,可为抗拔桩优化设计提供参考。Aimed at addressing the prevailing selection of super-long uplift according to experience, this paper introduces the simulation of the pile head displacement,based on the pile foundation engineering in soft soil area in Shanghai and using the optimized hyperbolic model,and the optimization of the model of the super-long pile,according to the effective length of the pile.The results show that given the negative effect of the effective length on the pile design ultimate bearing capacity of super-long pile,the design value exceeding the effective length is uneconomical.The optimal model for the super-long pile in soft soil area involves the side grouting pile.The study allowing for the operation effect of the depth of the pile provides references for the optimal design of uplift piles.

关 键 词：超长抗拔桩 有效桩长 优化选型 双曲线模型 

分 类 号：TU473[建筑科学—结构工程]