| 混凝土芯砂石桩的沉桩挤土效应及超孔隙水压力变化 |
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| 引用本文： | 鲁绪文,何宁,关秉洪,俞缙.混凝土芯砂石桩的沉桩挤土效应及超孔隙水压力变化[J].水利水运工程学报,2006,0(4):41-45. |
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| 作者姓名： | 鲁绪文 何宁 关秉洪 俞缙 |
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| 作者单位： | 南京水利科学研究院,江苏,南京,210029 |
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| 摘 要： | 简单介绍了新型软基处理技术———混凝土芯砂石桩.从挤土桩沉桩过程产生的挤土效应出发,运用圆孔扩张理论和固结理论,分析了混凝土芯砂石桩的挤土性状.算例表明,成桩后的混凝土芯砂石桩,其挤土效应产生的超孔隙水压力的消散,远快于常用的水泥粉煤灰碎石桩(CFG桩).
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| 关 键 词： | 圆孔扩张理论 挤土效应 超孔隙水压力 固结 混凝土芯砂石桩 |
| 文章编号： | 1009-640X(2006)04-0041-05 |
| 收稿时间： | 2006-05-08 |
| 修稿时间： | 2006年5月8日 |
Soil squeezing effect of concrete-cored sand-gravel piles and excess pore water pressure dissipation |
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| LU Xu-wen,HE Ning,GUAN Bing-hong,YU Jin.Soil squeezing effect of concrete-cored sand-gravel piles and excess pore water pressure dissipation[J].Hydro-Science and Engineering,2006,0(4):41-45. |
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| Authors: | LU Xu-wen HE Ning GUAN Bing-hong YU Jin |
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| Affiliation: | Nanjing Hydraulic Research Institute, Nanjing 210029, China |
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| Abstract: | Concrete-cored sand-gravel pile as a new technique for improvement of soft foundation is briefly introduced.Based on the squeezing effect in the process of pile sinking,the squeezing behaviour of concrete-cored sand-gravel piles is analyzed by applying cavity expansion theory and consolidation theory.Results of calculation show that dissipation of excess pore water pressure due to squeezing effect of concrete-cored sand-gravel piles is faster than that of the ordinary CFG piles. |
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| Keywords: | cavity expansion theory soil squeezing effect excess pore water pressure consolidation concrete-cored sand-gravel piles |
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