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在溜砂坡系列研究之二的基础上,对风干砂的运动特征进行了细致观察。将干砂流视为连续介质的流动,对干砂流的运动动力和阻力进行了深入研究,建立了干砂流垂线流速分布方程和干砂流体底面、表面滑动速度方程。结合挡砂工程,将干砂流体视为沿底面(此种砂坡的天然休止角)滑动的三角体,从而导出粒状碎屑溜砂坡水平土压力(或水平推力)计算模型。
On the basis of the second series of studies on slippery sand slope, the movement characteristics of dry sand are carefully observed. The dry sand flow is regarded as the continuous medium flow. The kinetic force and resistance of the dry sand flow are studied in depth. The vertical flow velocity distribution equation of dry sand flow and the bottom surface and surface slip velocity equations of dry sand fluid are established. Combined with the sand blocking project, the dry sand fluid is treated as a triangular body that slides along the bottom (the natural angle of repose of the sand slope) to derive a computational model of the horizontal earth pressure (or horizontal thrust) of the granular debris slips.