裂隙水流对裂隙壁的双重力学效应

Dual Mechanical Effects of Flow on Fissure Walls

裂隙水流对裂隙壁同时具有法向渗透静水压力作用和切向的拖曳力 (渗透动水压力 )作用。本文提出单一光滑平直裂隙、充填裂隙、水流和充填物一起流动 3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。

Flow in the fissures of rock mass applies simultaneously the normal hydrostatic seepage pressure and the tangent hauling force(dynamic seepage pressure) on fissure walls.The equations for the calculation of hydrostatic seepage pressure and hauling force are proposed herein and an example is also given to analyze the dual mechanical effects of fissure flow quantitatively.It is shown that both hydrostatic seepage pressure and hauling force increase the stress components in rock mass and dual mechanical effects of fissure flow should be taken into account in computing the stress of rock mass.