高 铁 有 砟 轨 道 路 基 注 浆 过 程 冒 浆 分 析 和 控 制

COMSOL Multiphysics finite element software was used to establish a three-dimensional grouting model of high-speed railway ballast-track subgrade. Taking grouting pressure，grouting depth，grouting downward inclination angle and grouting pipe spacing as the main grouting parameters， a numerical simulation study was conducted. The results showed that：The upper surface flux can be used to characterize the amount of grouting. In the process of grouting，the amount of surface mud spillover is significantly positively correlated with the grouting pressure. When the grouting pressure increases by 0.1 MPa，the flux linearly increases by about 0.05 kg/m²·s. The surface flux decreases with the increase of grouting depth，downward inclination angle and grouting pipe spacing. Grouting pressure has a significant effect on the grouting effect. The combined construction method of sleeve valve tube section and upper cover layer is adopted，which can effectively control the mud spillover problem.