Analysis of Seepage Field with Densely Distributed Drainage Holes Considering Rainfall Infiltration

The problem of solving the seepage field with complicated boundaries frequently involves rainfall infiltration boundary as well as densely-distributed drainage hole boundary. This is in general an unsaturated seepage problem, and therefore, the traditional steady saturated drainage substructure model is not applicable any more. In this paper, according to the two classified drainage holes, typical subdividing modes for the two types of drainage holes are offered and a hydraulic model for unsaturated drainage substructure is presented correspondingly. Additionally, other boundaries like rainfall infiltration boundary which are not considered in traditional model are introduced, making the model more comprehensive and improved.