中文摘要：

海底构筑物会被运动的浑水流冲击破坏,浑水流的运动能力受到浑水体流变特征的影响。由此需要关注浑水体流变特征发生变化的含沙量界限。本文采用流变仪试验和水槽试验相结合,对不同含沙量的浑水体进行试验,结果表明,淡水介质情况下牛顿流体和宾汉流体的过渡界限含沙量范围在340~400g/L;牛顿流体、宾汉流体、及其过渡界限流体的运动宏观特征不同,流速有差异。通过对浑水体中颗粒分布的分析,认为颗粒表面的结合水膜对流变特性几乎没有影响,以颗粒为固壁的水流边界层厚度可能对浑水体流变特性有影响,而颗粒之间形成的孔隙造成的毛细作用是影响不同含沙量浑水体流变特性的重要因素。

英文摘要：

The destruction of the submarine structures is quite often caused by the turbid water movement whilst rheological properties being the essence of turbid water movement ability.Thus we need to do the research about the sediment concentration limits in the changing rheological characteristics of turbid water.Rheometer test and flume experiment was adopted in this research to study the rheological properties of turbid water with different concentrations.The result shows that the transition boundaries of concentration between Newtonian fluid and Bingham fluid are 340~400g/L in fresh water.Macroscopic characteristics of motion and fluid velocity vary accordingly in different fluid type.Through the analysis of particle distribution in turbid water,it is considered that the absorbed water layer of clay particles has no effect on the rheological properties of turbid water wand the flow boundary layer thickness is likely attributable to its rheological properties.The capillary action caused by intergranular pores between particles has been proved to be an important factor attributable to the variation of rheological properties of turbid water with different concentrations.