基于CPTU测试p-y曲线法及其在桩基水平承载中的应用

发布时间：2018-03-21 03:38

本文选题：桩基础　切入点：孔压静力触探　出处：《岩石力学与工程学报》2017年02期 　论文类型：期刊论文

【摘要】：孔压静力触探(piezocone penetration test,CPTU)原位测试提供的是最直接、最原始的土性参数,可以精细化反映土层信息随深度的非线性变化。采用原位测试CPTU锥尖贯入参数对桩基水平承载力进行评价,建立锥尖参数与p-y曲线参数的综合对应关系,提出基于CPTU原位测试的单桩p-y曲线计算及水平承载力确定方法。依托典型场地(靖江长江漫滩,宿迁废黄河泛滥区,苏州昆山太湖流域)水平试桩资料,对比验证了CPTU法p-y曲线模型的准确性及其在桩基水平承载预测中的可行性。结论表明:CPTU测试p-y曲线法能准确反映水平受荷桩的土抗力发挥特点,是一种高效、快速的桩基水平承载力确定方法。
[Abstract]:Piezocone penetration test (CPTU) in-situ test of pore pressure hydrostatic penetration provides the most direct and original soil parameters, which can reflect the nonlinear variation of soil information with depth. The horizontal bearing capacity of pile foundation is evaluated by in-situ measurement of CPTU cone penetration parameters. The synthetic correspondence between the parameters of the cone tip and the p-y curve is established, and the calculation of p-y curve and the determination of the horizontal bearing capacity of the single pile based on CPTU in-situ test are put forward. The typical site (Jingjiang Yangtze River floodplain, Suqian abandoned Yellow River flood area, Suqian abandoned Yellow River flood area) is established. Suzhou Kunshan Taihu Basin) horizontal pile test data, The accuracy of p-y curve model of CPTU method and its feasibility in the prediction of horizontal bearing capacity of pile foundation are compared and verified. The conclusion is that the p-y curve method tested by the CPTU method can accurately reflect the characteristics of soil resistance of horizontally loaded piles and is a kind of high efficiency. A fast method for determining horizontal bearing capacity of pile foundation.
【作者单位】：东南大学岩土工程研究所;东南大学江苏省城市地下工程与环境安全重点实验室;
【基金】：国家自然科学基金资助项目(51279032) “十二五”国家科技支撑计划项目(2012BAJ01B02) 江苏省建设系统科技计划项目(2014ZD66)~~
【分类号】：TU473.1

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