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对层流状态的高浓度泥沙混合流体的间隙水压的分布，用闭合水路回转圆筒实验装置进行测定得知：间隙水压来源于且高于静水压。引起间隙水压上升的主要因素除雷诺应力外，混合流体内部粒子相与流体相的流线不同造成间隙水压上升，其中砂砾的粒径起着决定性的作用。
The distribution of interstitial water pressure of high concentration sediment mixed fluid in the laminar flow state was measured by a closed loop rotary cylinder test apparatus. It is known that the interstitial water pressure is higher than the hydrostatic pressure. In addition to the Reynolds stress, the interstitial water pressure increases due to the different flow lines between the particle phase and the fluid phase in the mixed fluid, and the particle size of grit plays a decisive role.