| 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). |
| 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 |
| DOI： |
| 分类号:TU473.1 |
| 基金项目: |
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| 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
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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. |
| Key words: cavity expansion theory,soil squeezing effect,excess pore water pressure,consolidation,concrete-cored sand-gravel piles |
