| 饱和成层地基中静压单桩挤土效应的有限元模拟 |
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| 引用本文： | 鹿群,龚晓南,崔武文,王建良.饱和成层地基中静压单桩挤土效应的有限元模拟[J].岩土力学,2008,29(11):3017-3020. |
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| 作者姓名： | 鹿群 龚晓南 崔武文 王建良 |
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| 作者单位： | 1. 浙江大学 土木工程学系，杭州 310027；2. 天津城市建设学院，天津 300384；3. 河北工业大学 土建学院，天津 300132； 4. 绍兴地基基础测试技术研究所，浙江 绍兴 312030 |
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| 基金项目： | 天津市自然科学基金
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天津市高等学校科技发展基金计划
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| 摘 要： | 针对实际工程中成层土情况中静压桩存在的问题，在ANSYS平台上，应用位移贯入法对静力压桩的连续贯入的全过程进行有限元模拟，详细对比了在均质土和成层土中静力压桩产生的位移场和应力场。指出软硬土层交界处土体位移加 大，土中挤压应力剧变，出现应力间断。实际工程中，挤压应力间断使已压入桩的侧向受力剧变，导致桩体易开裂、弯折。这里提出相应的解决方法。
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| 关 键 词： | 成层土 静压桩 挤土效应 应力间断 |
| 收稿时间： | 2006-12-28 |
Squeezing effects of jacked pile in layered soil |
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| LU Qun,GONG Xiao-nan,CUI Wu-wen,WANG Jian-liang.Squeezing effects of jacked pile in layered soil[J].Rock and Soil Mechanics,2008,29(11):3017-3020. |
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| Authors: | LU Qun GONG Xiao-nan CUI Wu-wen WANG Jian-liang |
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| Institution: | 1. Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China; 2. Tianjin Institute of Urban Construction, Tianjin 300384, China; 3. School of Civil Engineering and Architeture, Herbei University of Technology, Tianjin 300132, China; 4. Research Institute of Foundation Testing Technology, Shaoxing 312032, China |
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| Abstract: | Aiming at the problems occurring in actual projects, using the displacement penetration method, the complete process of successive penetration of jacked pile is simulated with finite element method based on ANSYS. Displacements and stress field in homogeneous soil are compared with which in layered soil in detail. It is shown that the soil’s displacement increases; and radial compression stress changes rapidly and discontinues at the boundary of soft soil and hard soil; and piles driven before are prone to be broken there.The methods for prevention is put forward. |
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| Keywords: | layered soil jacked pile squeezing effects stress discontinuity |
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