| 高速铁路粉喷桩复合地基临界桩长的测试研究 |
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| 引用本文： | 付凌云,刘运飞. 高速铁路粉喷桩复合地基临界桩长的测试研究[J]. 长江科学院院报, 2009, 26(12): 76-80 |
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| 作者姓名： | 付凌云 刘运飞 |
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| 作者单位： | 湖北水利水电职业技术学院,建筑工程系,武汉,430070;长江科学院,信息中心,武汉,430010 |
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| 摘 要： | 临界桩长是复合地基的一个重要参数，如何经济、合理地进行设计，是工程应用中极为关注的问题。而影响临界桩长的因素较多，针对如何考虑各个因素对临界桩长的影响程度问题，采用目前复合地基临界桩长研究中常用的计算公式，对影响复合地基临界桩长的相关因素进行了分析。结合高速铁路粉喷桩复合地基现场工程试验，对路堤荷载作用下粉喷桩复合地基临界桩长进行了探讨。研究表明 : 从承载力、沉降的概念出发推导的计算公式，计算得到的临界桩长偏小；采用荷载传递函数法导出临界桩长的计算公式较合理。桩体模量、土体模量、桩侧摩阻力位移值是影响粉喷桩复合地基临界桩长的主要因素，而土体的泊松比对临界桩长的影响较小。提出了粉喷桩复合地基并非都存在临界桩长的新观点。
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| 关 键 词： | 铁路工程 软土 粉喷桩 复合地基 临界桩长 沉降 |
Test Research on Critical Length of Dry Jet Mixing Pile of Composite Foundation in High-speed Railway |
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| FU Ling-yun,LIU Yun-fei. Test Research on Critical Length of Dry Jet Mixing Pile of Composite Foundation in High-speed Railway[J]. Journal of Yangtze River Scientific Research Institute, 2009, 26(12): 76-80 |
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| Authors: | FU Ling-yun LIU Yun-fei |
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| Affiliation: | FU Ling-yun 1,LIU Yun-fei 2 (1.Hubei Water Resources Technical College,Wuhan 430070,China,2.Yangtze River Scientific Research Institute,Wuhan 430010,China) |
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| Abstract: | The critical length of a pile is an important parameter in a composite foundation.How to economically and reasonably design the composite foundation with piles is a notable problem.Several factors influence the critical length of the pile.How to consider the effect degree of factors on the critical length is a problem to be solved.The critical length of a dry jet mixing pile in a composite foundation of some high-speed railway was analysed through field tests.The factors affecting the critical length of the... |
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| Keywords: | railway engineering soft soil dry jet mixing pile composite foundation critical length of pile settlement |
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