【摘要】 根据粘性细泥沙絮凝的电化学理论，导出颗粒之间粘着力的表达式，建立了包括粗、细泥沙在内的统一的临界起动切应力和临界起动流速公式。该式与已有的公式和实测资料进行了比较，符合良好，能较好地描述淤泥不同沉积密度时起动条件的变化。应用建议的起动公式，只需用常规试验测定几项基本参数，便可预报在不同沉积密度时的临界起动切应力或临界起动流速。更多还原

【Abstract】 Based on the electron-chemical theory of fine sediment flocculation,the cohesive force expression betwen fine sediment grains was deduced in this paper.The incipient formulas for shear stress and velocity of sediment containing coarse and fine particles were built.They were compared with those currently used and the measured data in experiments.It can be seen that they coincide very well and may be used to describe the variations of critical incipient values of silts under the differient settling densities.Only some usual basic parameters of silts need to measured for using these formulas to predict its incipient motion conditions.更多还原