摘要
以随机理论为基础,把岩土体渗透系数视为随机变量。根据渗透系数的概率分布,把岩土体视为按概率分布的不同渗透系数介质的混合体,不同渗透系数介质对渗流场产生贡献的大小由其概率的大小来确定。在确定岩土体渗透系数后,通过渗流方程就可求出不同渗透系数作用下区域内的水头分布和断面流量,再根据渗透系数的概率大小进行叠加,求出整个区域内的水头分布和断面流量。工程实例表明,该方法较确定性有限元法误差小,可作为渗流计算的又一方法用于渗流分析。
Based on the statistic theory,seepage coefficient of rock and soil is considered as random variable. Therefore rock and soil can be assumed to be mixture with different seepage coefficients of isotropic media,according to the probability distribution of seepage coefficient. The contribution of rock and soil with different seepage coefficient to seepage field are determined by their probability. After determination seepage coefficient of rock and soil,water head of region and flux of section can be obtained by solution seepage equations with different seepage coefficients. As a result,the final water head of region and flux of section are weighted by the probability distribution of seepage coefficient. This method is proved by engineering example with fewer errors than FEM,so it can be another way used to analyze seepage.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第S1期385-388,共4页
Rock and Soil Mechanics
关键词
概率分析
岩土渗流
渗透系数
叠加原理
有限元法
probabilistic analysis
seepage of rock and soil
seepage coefficient
principle of superposition
FEM
