一、粉细砂地基渗流的特点建筑物和地基是联合工作的,建筑物本身要有足够的强度,地基要有足够的稳定.不同地基土的抗渗稳定性是不同的,粘性土较强,而粉细砂则很差,极易产生渗透变形.因此,我们首先研究粉细砂土的特性,再探讨如何控制渗流。粉细砂土的特性是,当不均匀系数C_u<5的粉土或粉砂、极细砂、细砂,在不大的渗流坡降(如水平段坡降为0.1)作用下会产生流动,极易形成流砂;轻粉质砂壤土、轻砂壤土也很容易形成流砂,但粘粒含量增大时,其抗渗稳定性会有所增加。另外,这类上 First, the fine sand foundation seepage of the characteristics of the building and the foundation is a joint work, the building itself to have sufficient strength, the foundation should have sufficient stability impervious impermeability of different stability of the soil is different, strong clay , While fine silt is very poor, prone to infiltration deformation. Therefore, we first study the characteristics of fine sand, and then explore how to control seepage. The characteristic of fine sand is that when the silt, silt, fine sand and sand with non-uniform coefficient C_u <5 will flow under the condition of small seepage gradient , Easily formed flow sand; light silty sandy loam, light sandy loam is also very easy to form a quicksand, but clay content increases, its impermeability will increase. In addition, these types of