岩体中裂隙水流对裂隙壁的双重力学效应

岩体中裂隙水流对裂隙壁同时具有法向的渗透静水压力作用和切向的拖曳力（渗透动水压力）作用。本文提出在单一光滑平直裂隙、充填裂隙、水流和充填物一起流动三种情况下裂隙壁所受的渗透静水压力和拖曳力公式，并采用算例定量分析裂隙水流对裂隙壁的这种双重力学效应。结果表明，裂隙水流的渗透静水压力和切向拖曳力作用都会使岩体各应力分量增大，计算岩体应力时应考虑裂隙水流的双重力学效应。

Double mechanical effects of fissure flow on fissure walls

Flow through fissures in rock mass applies simultaneously the normal hydrostatic seepage pressure and the tangent hauling force (the dynamic seepage pressure) on fissure walls. The equations for the hydrostatic seepage pressure and the hauling force and are proposed under three cases of single fissure without fillings, single fissure with fillings and water-filling flow. A computation example is also given to analyze quantitatively the double mechanical effects of fissure flow. It can be shown that both the hydrostatic seepage pressure and the hauling force make the stress components in rock mass bigger, and double mechanical effects of fissure flow should be taken into account in computing the stress in rock mass.