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通过广义两相达西渗透定律,应用数值方法研究了浆液在动水环境中扩散形态、注浆压力演化规律。计算结果表明,水流抑制浆液逆水流方向与垂直水流方向的浆液扩散,促使浆液顺水流方向扩散;注浆后期浆液逆水扩散距离与扩散开度存在极大值,不随注浆时间延长而增大;注浆初期注浆压力显著增大,注浆后期注浆压力基本保持稳定且注浆压力与注浆速度、浆液黏度、水头压力呈近似线性关系。
Through the generalized two-phase Darcy's law of infiltration, the diffusion of grout in moving water and the evolution of grouting pressure were studied by numerical method. The calculated results show that the water flow inhibits the slurry from spreading in the direction opposite to the vertical flow direction and accelerates the flow of the slurry along the water flow direction. The maximum value of the reverse flow diffusion distance and diffusion opening of slurry in the late grouting stage does not increase with the grouting time. The grouting pressure increased significantly during the initial grouting period, and the grouting pressure remained stable at the later stage of grouting. The grouting pressure showed an approximate linear relationship with grouting speed, slurry viscosity and head pressure.