Rainfall infiltration simulation on embankment containing soluble material

¹ Kindai University, Department of Civil and Environmental Engineering, 3-4-1 Kowakae Higashi-Osaka Osaka, Japan
² Kindai University, Graduate School of Science and Engineering, 3-4-1 Kowakae Higashi-Osaka Osaka, Japan
³ Kobe University, Department of Civil Engineering, 1-1 Rokkoudai-cho Nada Kobe Hyogo, Japan

^* Corresponding author: kkawai@civileng.kindai.ac.jp

Abstract

Recently, mixtures of low-quality soil together with solidification materials, such as cement or steel slag, have been used for earthmoving construction. Solidification materials can improve consistency, shear strength, stiffness, and other parameters of low-quality soil by generating bonding forces between soil particles and changing grain size gradation. However, these solidification materials also contain chemical agents. In this study, simulations of rainfall infiltration into embankment constructed with the soil-solidification material mixture are conducted using the soil/water/air/soluble material coupled finite element analysis code, DACSAR-MP_ad. This analysis code can express not only deformation and seepage for an unsaturated earth structure but can also concurrently model the dispersing behaviour of soluble material. Herein, permeability and rainfall intensity conditions are provided and their effects investigated. Consequently, this study succeeds in expressing different distributions of soluble materials within embankment under different rainfall conditions.