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在研究节理的渗流时,渗流控制方程对节理渗流分析结果具有显著影响。首先介绍了节理渗流分析中的控制方程:Navier-Stokes方程、Stokes方程、Reynolds方程和立定定理,并分析了各控制方程在节理渗流分析中的适用性。以Reynolds方程作为渗流分析控制方程,建立了粗糙节理渗流空腔模型。然后以节理试件为研究对象,在实测节理三维表面形貌并计算隙宽分布后,分别进行相同渗流边界条件下的室内渗流试验和空腔模型计算,得到节理在不同接触状态下的渗流量实测值和计算值,并分别将计算结果与立方定理下的空腔模型、将整个节理简化为光滑平行板模型的立方定理以及速宝玉经验公式的计算结果进行比较,结果表明,Reynolds方程下的节理渗流空腔模型计算结果与实测值最为吻合,可以较为准确地反映节理的渗流情况。同时,根据Reynolds方程下空腔模型得到的渗流流量分布可以呈现节理渗流的曲折现象,为从本质上研究节理渗流特性奠定了理论基础。
When studying the seepage of joints, seepage control equations have a significant influence on the results of joint seepage analysis. Firstly, the governing equations in seepage analysis of joints are introduced: Navier-Stokes equations, Stokes equations, Reynolds equations and the set theorem. The applicability of the governing equations in the seepage analysis of joints is analyzed. By using the Reynolds equation as the seepage analysis control equation, the seepage cavity model of rough joint is established. Then, the joint specimen is taken as the research object. After measuring the three-dimensional surface topography and calculating the gap width distribution, the seepage test and the cavity model under the same seepage boundary conditions are respectively calculated, and the seepage flux under different contact conditions The calculated results are compared with the cubic cavity model under Cubic theorem, the cubic joint theorem which simplifies the whole joint to the smooth parallel plate model and the empirical formula of Supabet. The results show that under the Reynolds equation The calculated results of joint seepage cavity model are in good agreement with the measured values, which can reflect the seepage situation of joints more accurately. At the same time, the seepage flow distribution obtained by the cavity model under the Reynolds equation can show the tortuous phenomenon of the seepage seepage, which lays a theoretical foundation for the study of the seepage characteristics of the joint.