岩石节理张开度的概率模型与随机模拟  

PROBABILISTIC MODEL AND STOCHASTIC SIMULATION FOR APERTURE OF ROCK JOINTS

作　　者：周创兵[1] 叶自桐[1] 何炬林 张辉 

机构地区：[1]武汉水利电力大学,武汉430072

出　　处：《岩石力学与工程学报》1998年第3期267-272,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金!59579020

摘　　要：为研究岩石节理张开度的概率模型，将节理抽象成界面层，根据含贯通节理的岩石压缩变形特征，确定节理的平均力学张开度。根据节理非饱和渗流试验测定的毛细压力与饱和度的关系推断节理张开度的概率分布类型和分布参数。研究表明，单参数的Gamma分布可合理地表征节理张开度的随机分布特征；张开度的空间变化可用Monte－Carlo法模拟，从而为进一步研究岩石节理的非饱和渗透特性创造条件。In order to study the probabilistic model for aperture of rock joints, rock jointsare idealized as inter facial layers with certain thickness. The mean mechanical aperture ofrock joints can be determined based on the normal deformation characteristics of rock witha continuous joint. The probabilistic distribution and parameters can be identifieddepending on the relationship between capillary pressure and saturation measured inunsaturated seepage test. It is found that the sinsle parameter Gamma distribution can beused to characterize the aperture distribution, and the spatial configulation can besimulated by the Monte-Carlo technique. The results obtained can provide a basis for thefurther study of unsaturated seepage mechanism.

关 键 词：岩石节理 张开度 概率模型 随机模拟 

分 类 号：TU452[建筑科学—岩土工程]