马鞍山淤泥质粉质黏土土性相关性研究

Study on Correlation of Soil Properties of Mucky Silty Clay in Maanshan

摘要: 岩土土性具有较强的地域性，查明其区域性，对于当地工程建设具有重要意义。本文以马鞍山江边软黏土地基为例，以淤泥质粉质黏土为研究对象，研究区域内淤泥质粉质黏土埋深浅，土层厚，查明该地软黏土地基物理力学指标对工程建设有着重要意义。对马鞍山江边软黏土地基土物理力学指标进行统计分析，发现淤泥质粉质粘土厚14 m，物理力学指标随土层深度变化小，且发现马鞍山散料物理力学指标之间存在较好的线性相关。马鞍散料场地基土淤泥质粉质黏土物理力学指标之间相关性显著，其中物理指标相关性好，尤其是孔隙比、含水率、塑限、液限及天然重度的线性拟合，其相关系数R²均大于0.9。力学指标存在一定变异性，但力学指标与物理指标间相关性好，尤其是孔隙比与压缩系数、无侧限抗压强度和内聚力之间相关性尤为显著。

Abstract: Geotechnical properties have strong regional characteristics, so it is of great significance to identify their regional characteristics for local engineering construction. In this paper, taking the soft clay foundation near the Maanshan River as an example, taking the muddy silty clay as the research object, the buried depth of the muddy silty clay in the research area is shallow, and the soil layer is thick. It is of great significance to find out the physical and mechanical indexes of the soft clay foundation in this area for engineering construction. Based on the statistical analysis of the physical and mechanical indexes of the soft clay foundation soil near the Maanshan River, it is found that the muddy silty clay is 14 m thick, and the physical and mechanical indexes change little with the depth of the soil layer. It is also found that there is a good linear correlation between the physical and mechanical indexes of Maanshan bulk materials. The physical and mechanical indexes of mucky silty clay in the foundation soil of Ma’an bulk material site are significantly correlated, among which the physical indexes are well correlated, especially the linear fitting of void ratio, water content, plastic limit, liquid limit and natural gravity, with the correlation coefficient R² greater than 0.9. There is some variability in mechanical indexes, but the correlation between mechanical indexes and physical indexes is good, especially the correlation between void ratio and compression coefficient, unconfined compressive strength and cohesion.