| 考虑时效作用的桩基承载力计算方法研究 |
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| 引用本文： | 彭劼,施建勇,娄亮,郑少军.考虑时效作用的桩基承载力计算方法研究[J].岩土力学,2003,24(1):118-122. |
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| 作者姓名： | 彭劼 施建勇 娄亮 郑少军 |
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| 作者单位： | 1. 河海大学 岩土工程研究所，江苏 南京 210098； 2. 杭金衢高速公路总监办，浙江 萧山 320001； 3. 杭金衢高速公路萧山段指挥部，浙江 萧山 320001 |
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| 基金项目： | 教育部优秀青年教师教学和科研奖励计划资助。 |
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| 摘 要： | 采用空间轴对称固结有限元结合修正剑桥模型，用柱形孔扩张对沉桩过程进行模拟，求出不同时期桩周土中的应力，从而得到不同间歇期桩侧的最大摩擦力。应用荷载传递法对桩基承载力进行计算，结合桩周土体剪切强度、应力状态的变化，得到了考虑时效影响的桩基承载力的计算方法。实例计算表明，结果较合理。
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| 关 键 词： | 修正剑桥模型 柱形孔扩张 桩基承载力 荷载传递法 |
| 文章编号： | 1000-7598-(2003)01-0118-05 |
| 收稿时间： | 2001-09-28 |
| 修稿时间： | 2001年9月28日 |
Research on calculating pile's bearing capacity considering time-effect combining |
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| PENG Jie,SHI Jian-yong,LOU Liang,ZHENG Shao-jun.Research on calculating pile''s bearing capacity considering time-effect combining[J].Rock and Soil Mechanics,2003,24(1):118-122. |
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| Authors: | PENG Jie SHI Jian-yong LOU Liang ZHENG Shao-jun |
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| Institution: | 1. Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China; 2. Hang-Jin-Qu Expressway Headquarter Suppervision office, Hangzhou 320001, China; 3. Hang-Jin-Qu Expressway Headquarter Suppervision office of Xiaoshan, Xiaoshan 320001, China |
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| Abstract: | The cylindrical expansion combining with spatial axisymmetrical consolidation finite element method and modified Cam-clay model, is adopted to simulate pile driving. Stresses around a pile at vavious time can be calculated and then the maximum frictional force of pile-soil interface at various time can be obtained. The load transfer method is adopted to compute pile’s bearing capacity. Considering the change of mechanical property and stress state of soil adjacent pile, a method of calculating pile’s bearing capacity considering time-effect is gained and an example shows it is rational. |
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| Keywords: | modified Cam-clay model cylindrical expansion pile’s bearing capacity load transfer method |
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