| 考虑负摩阻力的回填土地基单桩承载力计算 |
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| 引用本文： | 张志新,张金龙. 考虑负摩阻力的回填土地基单桩承载力计算[J]. 黑龙江科技学院学报, 2011, 21(3): 189-193 |
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| 作者姓名： | 张志新 张金龙 |
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| 作者单位： | 1. 北京兴昌高科技发展有限公司,北京,102200
2. 黑龙江科技学院,资源与环境工程学院,哈尔滨,150027 |
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| 摘 要： | 回填土地基的桩基设计若忽略负摩阻力的影响,将使设计有不安全因素。根据负摩阻力产生条件和作用机理,通过现场静载荷实验,研究了考虑负摩阻力的回填土地基中端承桩单桩承载力计算问题。实例分析表明,由于桩侧负摩阻力的影响,单桩承载力大为降低。产生负摩阻力的土层,不宜采用端承型桩基。该结果可为回填土地基的桩基设计提供理论依据。
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| 关 键 词： | 负摩阻力 回填土地基 单桩 承载力 中性点 |
Calculations of vertical bearing capacity of single pile in backfilling soil in consideration of negative friction |
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| ZHANG Zhixin,ZHANG Jinlong. Calculations of vertical bearing capacity of single pile in backfilling soil in consideration of negative friction[J]. Journal of Heilongjiang Institute of Science and Technology, 2011, 21(3): 189-193 |
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| Authors: | ZHANG Zhixin ZHANG Jinlong |
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| Affiliation: | 1.Beijing Xingchang High Technology Development Company,Beijing 102200,China;2.College of Resource & Environment Engineering,Heilongjiang Institute of Science & Technology,Harbin 150027,China) |
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| Abstract: | Ignorance of the negative friction tends to results in unsafe design in pile foundation design.Through the field static load test,this paper introduces the calculation of the load capacity of a single pile surrounding by the backfilling soil in consideration of the negative friction based on the mechanism and the conditions of the negative friction production by using the ultimate analysis.The greatly reduced capacity of a single pile resulting from the negative friction leaves the end-bearing pile unsuitable in the backfilling soil.The study provides a theoretical basis for the design of the pile in the backfilling soil foundation. |
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| Keywords: | negative friction backfilling soil foundation single pile load capacity neutral point |
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