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在我国沿海、河流的中下游或湖泊附近地区,地表下埋藏有深厚的第四纪松软覆盖层,主要有三角洲相沉积、滨海相沉积、湖相沉积和黄泛冲积沉积等等。在这些不同成因形成的地层中,其接近地表部分有厚度不等的淤泥质软土。淤泥土的主要物理特性:一是含有很多的细颗粒及大量的有机物腐植质。二是颜色呈深灰或暗绿色,
In China’s coastal areas, middle and lower reaches of rivers or lakes in the area near the surface buried deep Quaternary soft cover, the delta facies sedimentation, coastal deposition, lacustrine sedimentation and alluvial deposition and so on. In these formations with different origins, there are muddy soft soils with different thicknesses near the surface. The main physical characteristics of the mud: First, contains a lot of fine particles and a large number of organic humus. Second, the color was dark gray or dark green,