| 刚性承台下刚性桩复合地基附加应力研究 |
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| 引用本文： | 孙林娜,龚晓南,齐静静.刚性承台下刚性桩复合地基附加应力研究[J].岩土力学,2006,27(Z2):917-920. |
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| 作者姓名： | 孙林娜 龚晓南 齐静静 |
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| 作者单位： | 浙江大学 岩土工程研究所，杭州 310027 |
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| 摘 要： | 复合地基内任一点的附加应力都是由桩间土所承担上部荷载和桩侧摩阻力及桩端阻力分别引起的附加应力叠加组成。根据荷载传递规律和现场试验，假定桩侧摩阻力沿深度半梯形分布，考虑到桩径的尺寸效应，采用Mindlin解对桩侧摩阻力和桩端阻力进行二次积分计算，求得桩上部荷载引起地基内任一点附加应力，桩间土上部荷载引起的附加应力采用Boussinesq解直接求得，最终叠加求得总附加应力。经工程实例验证，方法合理可行。
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| 关 键 词： | 刚性桩复合地基 桩侧摩阻力 附加应力 |
| 收稿时间： | 2006-07-10 |
Research on subsidiary stress of the rigid pile composite foundation under rigid cushion cup |
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| SUN Lin-na,GONG Xiao-nan,QI Jing-jing.Research on subsidiary stress of the rigid pile composite foundation under rigid cushion cup[J].Rock and Soil Mechanics,2006,27(Z2):917-920. |
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| Authors: | SUN Lin-na GONG Xiao-nan QI Jing-jing |
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| Institution: | Research Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310027 China |
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| Abstract: | The subsidiary stress of any point in composite foundation is superimposed by the upper China loading and those stresses caused by both soil and piles which include side friction resistance and end resistance. With assuming the semi-trapezoidal distribution of friction resistance according to load transfer and field test, and considering the size effect of pile, the subsidiary stress caused by side friction resistance and end resistance can be obtained by quadratic integral computation with Mindlin solution. The subsidiary stress caused by the upper loading can be obtained from Boussinesq solution. The total subsidiary stress is the sum of two parts of above. An engineering case study is also presented in this paper . |
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| Keywords: | rigid pile composite foundation side friction resistance of pile subsidiary stress |
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