论文部分内容阅读
孔隙比是评价粉土密实程度的重要指标,研究表明饱和粉土地基的液化指数与孔隙比有关。对于振冲法处理严重液化的饱和粉土地基,只要工后孔隙比降到0.75以下,就能达到消除液化的目的。利用试验成果,通过振冲桩施工前后土体的三相组成分析,量化振冲碎石桩的挤密、振实功效,推导出饱和粉土经振冲法处理后的工后孔隙比估算方法,估算结果与实测值的误差在±1.5%以内。利用该方法可以迅速接近最佳的桩距、桩径组合,为节省试验费用和加快试验进度提供可靠的依据。
The porosity ratio is an important index to evaluate the compaction degree of silt. The research shows that the liquefaction index of saturated silt foundation is related to the void ratio. For vibrating method to deal with severe liquefaction of saturated silt foundation, as long as the post-industrial porosity ratio dropped below 0.75, you can achieve the purpose of eliminating liquefaction. Based on the test results, through the three-phase composition analysis of the soil before and after the construction of the vibrating pile, the effect of compaction and vibrating of the vibrated stone column was quantified, and the post-occupation void ratio estimation method of the saturated silt was deduced. , The error between the estimation result and the measured value is within ± 1.5%. This method can quickly approach the best pile spacing and pile diameter combinations, providing a reliable basis for saving test costs and speeding up the test progress.