摘要
土体中的水呈饱和状态渗流时,其渗流状态比较简单;但若呈非饱和状态渗流时,其流速、流向随时间和空间在土体中的状态却比较复杂。而这些正是进行湿陷性黄土增湿、减湿沉降计算时需要知道的问题。通过黄土非饱和入渗规律原位试验对其进行了探讨,结果表明:在非饱和入渗时段内,土体各深度上饱和度随时间的变化呈近似线性关系,浅层土非饱和入渗时间随土深度的变化短期内也呈近似线性关系;黄土的浸润角略大于 30°。
The seepage of water is relatively simple within saturated soils. However, the temporal and spatial distributions of seepage speed and direction are more complicated in unsaturated soils, which are needed to be determined for calculating the settlement of loess with water increasing or reducing. This paper addresses these problems through in-situ testing study on infiltration in unsaturated loess. The results show that, at the stage of unsaturated infiltration, the saturation degree varies approximately linear with the time at different depths, and the time of infiltrating within shallow layers is also approximately linear related to the depth for a short period. In addition, the soggy angle of loess is found to be slightly larger than 30°.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第24期4156-4160,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
渗流力学
黄土
非饱和
入渗
Infiltration
Mechanical permeability
Seepage
Settlement of structures
Soils
