| 基于球孔扩张理论和时效性的静压桩承载力计算 |
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| 引用本文： | 王家涛,周健,张明义.基于球孔扩张理论和时效性的静压桩承载力计算[J].地下空间与工程学报,2010,6(5). |
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| 作者姓名： | 王家涛 周健 张明义 |
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| 作者单位： | 山东水利职业学院建筑工程系;同济大学地下建筑与工程系;青岛理工大学土木工程学院; |
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| 基金项目： | 国家自然科学基金，山东省高等学校优秀青年教师国内访问学者资助项目 |
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| 摘 要： | 通过研究软土地基中静压桩的承载性状发现,静压桩的单桩承载力随时间的提高主要来源于桩侧摩阻力的增长,而桩端阻力变化对承载力的时间效应影响较小。静压桩承载力随时间增长的关系可以用对数曲线描述。根据静压桩的贯入机制,将沉桩过程模拟为半无限土体中一系列球孔的连续扩张,土体假定为Mohr-Coulomb材料。基于球孔扩张理论,计算出不同时期桩侧极限摩阻力和桩端阻力,从而进一步求得不同休止期的静压桩极限承载力。与现场试验资料对比分析表明,计算值与实测值的变化规律一致,且误差较小,能够满足工程需要。
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| 关 键 词： | 静压桩 侧阻力 端阻力 时效性 极限承载力 |
Computation of Bearing Capacity of Jacked Piles Based on Spherical Cavity Expansion Theory and Time Effect |
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| Wang Jiatao,Zhou Jian,Zhang Mingyi.Computation of Bearing Capacity of Jacked Piles Based on Spherical Cavity Expansion Theory and Time Effect[J].Chinese Journal of Underground Space and Engineering,2010,6(5). |
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| Authors: | Wang Jiatao Zhou Jian Zhang Mingyi |
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| Affiliation: | Wang Jiatao1,Zhou Jian2,Zhang Mingyi3 (1.Department of Civil Engineering,Shandong Water Polytechnic,Rizhao,Shandong 276826,China,2.Department of Geotechnical Engineering,Tongji University,Shanghai 200092,3.Department of Civil Engineering,Qingdao Technology University,Qingdao,Shandong 266033,China) |
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| Abstract: | Through the study on the characteristics of bearing capacity of jacked pile in soft soil,it is found that the increasing of ultimate bearing capacity of the single pile is mainly determined by the pile side resistance.The end resistance has little influence on the time effect of bearing capacity of the pile.The relationship between ultimate bearing capacity and time can be described with logarithmic curve.According to the penetration mechanism of jacked pile,the expansion of a series of spherical cavities i... |
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| Keywords: | jacked pile side resistance end resistance time effect ultimate bearing capacity |
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