潭邵高速公路软土地基承载力参数灰色关联研究

Grey Relational Research on Bearing Capacity Parameters of Soft Foundation for Xiangtan-Shaoyang Highway

从地基土的物理力学性质出发,选用潭邵高速公路工程具有典型意义的两个工点作为软土地基钻探取样与原位的试验点,利用灰色系统的理论方法—灰色关联分析法,对软土地基承载力的影响因素进行量化分析,研究结果表明:轻型动力触探击数对承载力大小变化最为敏感,其次为软土的天然密度、压缩模量、粘聚力和塑性指数,而天然含水量、孔隙比和液性指数相对较不敏感。

This article based on the physical and mechanical properties of the foundation soil chooses two typical significance working points of Xiangtan-Shaoyang Highway as the testing points for drilling sampling and in-situ test.Using gray system method-Grey relational analysis,the factors affecting the bearing capacity is analyzed quantitatively.The study result shows that the number of the light dynamic penetration is the most sensitive factor;then the natural density,the compression modulus,the cohesion and the plasticity index are second-sensitive factors;however,relatively,the natural water content,the void ratio and the liquidity index are less sensitive factors.