| 软土中CFG桩施工引起的孔隙水压力现场试验研究 |
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| 引用本文： | 余闯,刘松玉,杜广印. 软土中CFG桩施工引起的孔隙水压力现场试验研究[J]. 工程勘察, 2010, 0(5): 16-18,88 |
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| 作者姓名： | 余闯 刘松玉 杜广印 |
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| 作者单位： | 温州大学建筑与土木工程学院;东南大学岩土工程研究所; |
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| 基金项目： | 浙江省钱江人才计划资助项目(2009R10047);;住房和城乡建设部科技计划项目(2008-K2-11) |
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| 摘 要： | 软土地基中水泥粉煤灰碎石桩(简称CFG桩)采用振动沉管法施工会产生较大的超孔隙水压力。本文采用经典的圆孔扩张理论,推导出了计算沉桩引起的孔隙水压力的基本公式,并给出了其中的关键参数——孔隙水压力系数Af的取值方法。结合工程试验,通过分析模拟软土地基中CFG桩单桩施工引起的孔隙水压力现场试验数据,得出了孔隙水压力的变化规律。结果表明,该计算方法较为可靠,可以用于沉桩的设计和优化。
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| 关 键 词： | 孔隙水压力 水泥粉煤灰碎石桩 软土 消散 |
Excess pore water pressure induced by CFG pile installation in soft ground |
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| Yu Chuang,Liu Songyu,Du Guangyin. Excess pore water pressure induced by CFG pile installation in soft ground[J]. Geotechnical Investigation & Surveying, 2010, 0(5): 16-18,88 |
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| Authors: | Yu Chuang Liu Songyu Du Guangyin |
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| Affiliation: | 1.College of Architecture and Civil Engineering;Wenzhou University;Zhejiang Wenzhou 325035;China;2.Institute of Geotechnical Engineering;Southeast University;Nanjing 210096;China |
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| Abstract: | The Cement-Flyash-Gravel Pile ( CFG pile ) installation causes the increase in pore water pressure of surrounding clays in soft ground.The equation of computing the pore water pressure is presented using classical cavity expansion method,in which the pore water pressure parameter Af is presented.One field test for single pile is carried out to investigate the pore water pressure.The dissipation time of excess pore pressure varies with the time and the distance from the single CFG pile.The computed results k... |
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| Keywords: | pore water pressure CFG pile soft ground dissipation |
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