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通过对福州市轨道交通2号线上淤泥质土资料进行分析,对各物理、力学指标及其变异性和相关性进行统计研究,建立重要指标间的关系经验公式,为福州地区地下工程的参数选取提供参考。研究表明,福州淤泥质土物理力学特性表现为天然含水量高、密度小、孔隙比大、液限高、压缩性高、抗剪强度低等特点。各物理指标变异性较小,尤其在95%置信区间取值范围偏差较小,在参数分析时可作为常量考虑;而力学指标数据变异性相对较大,应该考虑其差异性。物理指标e~w、w_L~w、wL~e、Ι_P~w_L、Ι_P~e具有很高的相关性,物理指标ω、ρ、e分别与力学指标a~ES和c~φ具有一定相关性。
Based on the analysis of the silty soil data of Metro Line 2 of Fuzhou City, the physical and mechanical indexes, their variability and their correlation were studied statistically, the empirical formula of the relationship between the important indexes was established, and the parameters of underground engineering in Fuzhou area Select for reference. The results show that the physical and mechanical properties of silt soil in Fuzhou are characterized by high natural water content, small density, large void ratio, high liquid limit, high compressibility and low shear strength. The variability of each physical index is small, especially in the 95% confidence interval, the deviation of the range of values is small, which can be considered as a constant in the parameter analysis. However, the variability of the mechanical index data is relatively large and its difference should be considered. The physical indexes e ~ w, w_L ~ w, wL ~ e, Ι_P ~ w_L, Ι_P ~ e have high correlations. The physical indexes ω, ρ, e have some correlation with the mechanical indexes a ~ ES and c ~ .