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基于大量的勘探资料、土工试验和原位测试数据,本文对淮安市区浅层黄泛冲积粉土的分布特征和工程特性进行了探讨。采用数理统计方法,对区内黄泛冲积粉土的物理力学指标进行了统计,发现粉土不同物理力学指标的变异系数差别较大,室内指标不能完全反映粉土的实际特性。进而对淮安市区黄泛冲积粉土静力触探试验锥尖阻力qc、标准贯入试验击数N值与载荷试验实测得到的地基承载力特征值fak进行统计分析,并分别对qc、N与fak进行相关性分析,拟合了相应的经验公式。最后对饱和粉土液化特性进行了探讨,并提出了相应的工程防治措施。
Based on a large amount of exploration data, geotechnical tests and in-situ test data, the distribution characteristics and engineering characteristics of shallow yellow alluvial silt soil in Huaian city are discussed in this paper. The mathematical and statistical methods were used to calculate the physical and mechanical indexes of the alluvial silt in the Yellow River. It was found that the coefficients of variation of different physical and mechanical indexes of silt were quite different. The indoor indexes did not fully reflect the actual characteristics of the silt. Furthermore, the cone tip resistance qc, the penetration number of the standard penetration test and the characteristic value fak of the foundation bearing capacity measured by the load test were statistically analyzed for the huai’an alluvial silty seepage test, and the numerical values of qc, N And fak correlation analysis, fitting the corresponding empirical formula. Finally, the liquefaction characteristics of saturated silt are discussed, and the corresponding engineering measures are put forward.