沅江软土工程地质特征

沅江地区的软土，可分为软粉砂质粘土、灰色粘土、淤泥质粘性土、淤泥4个主要类型，其工程地质特性为：天然含水量大于液限，天然孔隙比大于1，压缩系数大，流变性比较显著，承载力标准值较低。工程建设应重视上部结构层与地基基础的共同作用，利用地表硬壳层作为天然浅基或者进行适当的地基处理可以提高地基地的承载力。

THE ENGINEERING GEOLOGICAL FEATURE OF SOFT-SOIL IN YUANJIANG

The soft-soil in Yangjiang can be classified into soft silt clay, grey clay, mud-bearing clay and mud. Its engineering features are as the following: the water content is large than natural liquid-limited; the natural porosity is lager than 1; the compressing efficient is large; the current formation is very obviously and the load force is less than standard. The engineering construction must pay attention to the common action of the upper texture bed and the ground foundation, apply the hidden surface bed to become the natural shallow foundation or deal with it properly in order to increase the load of base.