Retracted: Influence of Rainfall on Soil Moisture Transport Characteristics in Subgrade Soil

In order to study the influence of rainfall type on the transport characteristics of rain in subgrade soil, a model for analyzing the transport characteristics of porous media was established. Based on the seepage theory of porous media, the influence of rainfall type on the velocity distribution, pressure distribution, phase distribution and temperature distribution of rain in subgrade soil was analyzed by computational fluid dynamics (CFD). The results show that the influence of rainfall type (rainfall intensity) on the transport characteristics of rainwater in subgrade soil is obvious. Under the condition of porosity 0.72, the rainfall type I (rainfall intensity
$\pmb{2.8}\ \mathbf{mm}/\mathbf{h}) > \mathbf{type}\ \mathbf{II}$
(rainfall intensity 2.6
$\mathbf{mm }/\mathbf{h}) > \mathbf{type}\ \mathbf{III} (\mathbf{rainfall}\ \mathbf{intensity}\ \pmb{1.6}\ \mathbf{mm}/\mathbf{h}) > \mathbf{type}\ \mathbf{IV}$
(rainfall intensity 1.4 mm / h). The research results will provide important guidance for pavement structure design.