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摘要：
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根据南沙港区主要地层土的室内试验和现场测试成果,分析固结过程中土体孔隙水压力变化特性。结果表明:三轴试验固结过程中,淤泥、淤泥质土和粘质粉砂孔隙水压力消散相同百分数的固结时间存在数量级差别,淤泥质土和粘质粉砂的渗透系数不能由时间-沉降曲线确定;三轴不排水剪切过程中,粘质粉砂中孔隙水压力随剪应变先增大后减小,表现出密实砂的孔隙水压力变化特性;该区域地基真空预压加固过程中吹填层、粘质粉砂层和淤泥质土层中的孔隙水压力随膜下真空压力增加而迅速降低,而淤泥层中孔隙水压力缓慢下降,地基土层具有明显的成层特性。
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Based on the laboratory test of master stratum in Nansha port and the results of the field test,pore water pressure behaviors in soft soil consolidation are analyzed.The test results show that the velocity of dissipation of excess pore water pressure are very much difference in triaxial consolidation test to these soil samples:silt,silty soil and clayey-fine-sand.Permeability coefficient can't be decided by time-settlement curve for silty soil or clayey-fine-sand.Pore water pressure is increased earlier and then minished with shear strain increased for clayey-fine-sand,which shows pore pressure behavior of close-grained sand.In ground improved by vacuum preloading in this area,the velocity of dissipation of excess pore water pressure is very fast in these stratums: silty soil,clayey-fine-sand and reclaimed soil.The dissipation of excess pore water pressure is very slow in silt stratum.The ground is evidently layered.
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基金项目：
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作者简介：
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参考文献：
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