摘要
常规方法研究非饱和裂隙介质往往采用宏观连续体的概念,然而现场试验证明,非饱和裂隙岩体中的渗流具有相当的非均质性。天然裂隙岩体的非饱和渗流是发生在三维裂隙网络中的多场非等温流,要在不完整的信息基础上刻画和表现介质的不均匀性,通常借助随机模拟的手段。将三维裂隙系统近似为概化的二维非均匀多孔介质的二维平面裂隙。采用模拟退火法将取自各种来源的信息资料通过建立适当的目标函数汇集至模型之中,以此模拟裂隙的空间特征。
The conventional approach for analysis of liquid seepage in partially saturated fracture media usually employs macroscale continuum concepts,but notable unevenness of local velocity and flux in fractured rocks has been observed in the field test. Unsaturated flow in naturally fractured rocks is generally a multi-phase,non-isothermal flow that occurs in a three-dimensional fracture network.Stochastic simulation has become a common tool for characterizing and visualizing heterogeneity on incomplete information.3D fracture systems are approximated as 2D planar fractures that are conceptualized as 2D heterogeneous porous media. Simulated annealing algorithm is applied to incorporate data from various sources into their models by formulating a suitable objective function;and then spatial fractures are characterized.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2006年第S1期198-202,共5页
Rock and Soil Mechanics
关键词
裂隙岩体
非饱和
渗流
统计模型
模拟退火法
fractured rocks
unsaturation
seepage
statistic model
simulated annealing algorithm
