关键词: 粗糙圆盘裂隙;浆-水两相流;灌浆驱水效率;相界面;

Abstract: Grouting in fracture is an important means to deal with the engineering geological problems of dam foundation.However, the existing research on fissure grouting often ignores the influence of water phase on the diffusion process of slurry, and can not truly and effectively reflect the slurry intrusion process.In order to accurately simulate the grouting process of dam foundation fractures, the phase field method was used to analyze the intrusion characteristics of slurry in fractured media, and a numerical model of rough disc fractures considering the effect of water phase was established.The effects of fracture roughness, fracture opening, grouting speed and grouting pressure on the intrusion characteristics of slurry under radiation flow conditions were analyzed.The results showed that the phase interface movement rate decreased with time under the condition of constant grouting rate.A rough bulge would cause viscous energy dissipation, resulting in a significantly larger pressure at the orifice of the rough disk than that of the smooth disk.Under the condition of constant grouting pressure, increasing grouting pressure was more effective than prolonging grouting time, and the smaller the opening was, the smaller the amount of slurry intrusion was.The grouting-water penetration efficiency was not only affected by the roughness size, but also related to the distribution of protrusions.The shear rate disturbance caused by the rough convex body near the grouting hole was greater than that caused by the rough convex body in the far field.

Key words: rough disk fracture; slurry-water two-phase flow; grouting-water penetration efficiency; phase interface;