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本文建立了具有法向压力梯度项和沙粒作用项的粗糙底壁附近流场的运动方程，结合对粘性底层和过渡区内层交界面的分析方法和小扰动稳定性理论，由理论分析和数值计算得到了流动雷诺数、无量纲扰动波数、无量纲两相法向平均速度差、斯托克斯数、壁面的粗糙元以及悬浮沙粒的质量浓度等因素与水流底壁湍流猝发角乃至猝发难易程度的关系，部分结果与已有的实验结果进行了比较．文中所得结论有助于进一步了解挟沙水流近壁流场和悬浮泥沙的运动特性以及泥沙的沉积和输运机理．
In this paper, the equations of motion of the flow field near the rough bottom wall with normal pressure gradients and sand particles are established. By combining the analytical method of the interface between the viscous bottom layer and the transition zone and the stability of small disturbance, The factors such as the flow Reynolds number, the dimensionless perturbation wave number, the dimensionless two-phase normalized average velocity difference, the Stokes number, the roughness of the wall surface and the mass concentration of the suspended sand were calculated. The relationship between the degree of difficulty, some of the results and the existing experimental results were compared. The conclusions drawn in this paper will help to further understand the movement characteristics of silt-laden flow near the wall and suspended sediment and sediment transport and transport mechanism.