| 按桩的割线刚度确定深厚覆盖土层中普通桩有效桩长 |
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| 引用本文： | 曾友金,章为民,王年香,徐光明.按桩的割线刚度确定深厚覆盖土层中普通桩有效桩长[J].岩土力学,2003,24(5):723-728. |
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| 作者姓名： | 曾友金 章为民 王年香 徐光明 |
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| 作者单位： | 南京水利科学研究院 土工研究所，江苏 南京210024 |
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| 摘 要： | 在提出的基桩有效桩长定义基础上，提出了桩的割线刚度控制法来确定有效桩长，并采用线弹塑性荷载传递函数，将其应用于确定深厚覆盖土层中普通桩有效桩长。分析了桩土刚度比K，桩径D，桩顶沉降量So，桩侧土极限位移Um，桩端土弹性模量与桩周土弹性模量比值Ko及土层泊松比μ对普通桩有效桩长的影响，其结果表明，除Ko和μ外，其余均有一定或较大地影响。为了将理论分析应用到工程桩中，对参数的取值进行了分析。
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| 关 键 词： | 有效桩长 割线刚度 荷载传递 超长桩 |
| 文章编号： | 1000-7598-(2003)05-0723-06 |
| 收稿时间： | 2002-06-26 |
| 修稿时间： | 2002年6月26日 |
Determination of effective length of a common pile in deep overlay soil layers with secant rigidity of pile |
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| ZENG You-jin,ZHANG Wei-min,WANG Nian-xiang,XU Guang-ming.Determination of effective length of a common pile in deep overlay soil layers with secant rigidity of pile[J].Rock and Soil Mechanics,2003,24(5):723-728. |
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| Authors: | ZENG You-jin ZHANG Wei-min WANG Nian-xiang XU Guang-ming |
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| Institution: | Nanjing Hydraulic Research Institute，Nanjing 210024, China |
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| Abstract: | The control method of secant rigidity of pile is put forward in order to determine effective length of pile based on the definition of effective length of foundation pile brought forward. It is applied to determine effective length of a common pile in deep overlay soil layers with linearly elastoplastic load transfer function. Influential factors of effective length such as coefficient of rigidity of pile, piles diameter, top settlement of pile, side ultimate displacement, elastic modulus ratio of the bottom soil and surrounding soil and Poissons ratio, are thoroughly analyzed. The results show that the factors have certain effects on effective length of the common pile except elastic modulus ratio of the bottom soil and surrounding soil, and Poissons ratio. In order to apply to practical project, it is studied how to confirm parameters in the project. |
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| Keywords: | effective length secant rigidity load transfer super-long pile |
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