浙江漩门湾软粘土物理力学特性的统计分析

Statistical Analysis of the Relationships between Mechanical and Indices Properties of Xuanmen Bay Soft Clays

通过现场原位取样与室内试验,对浙江漩门三期海堤地基软粘土的物理力学性质及其相关性进行了研究,并给出了各重要指标间相关性的经验公式。通过统计分析表明,各土层物理力学指标空间变异性较小,各指标沿深度的变化与土体的结构性相关。通过线性相关性分析表明,灵敏度与孔隙比的相关性较差,需要进一步的分析;而压缩系数与含水率和孔隙比之间的相关性较好,故可根据软粘土的物性指标进行土体压缩系数的预测,对工程设计初期具有一定的指导意义。

The comprehensive statistic studies on the relationships between the mechanical and the various indices properties have been performed on undisturbed soft clay samples from the third phase construction of Xuanmen Bay sea dikes in Zhejiang. The results indicate the some good relationships do exist between the mechanical properties and the physical indices. The both mechanical and physical properties change with the deposition depth and the soil fabrics. The linear regression analysis results show that good correlations between the compression coefficient and the void ratio as well as the natural moisture content, whereas, the soil sensitivity does not have a good relationship with the void ratio. It is concluded that, at the preliminary design stage, it is possible to use the physical indices to estimate the soil compression coefficient.