文档介绍：三峡大学硕士学位论文 II 内容摘要水在裂隙岩土体中的流动而形成的荷载对大坝、地下洞室、岩石边坡等工程的安全至关重要。以往主要研究裂隙中饱和渗流问题和不含裂隙多孔介质非饱和渗流问题,本文在总结前人的研究成果的基础上,采取室内试验与数值模拟相结合的方法, 针对裂隙的扩展规律、含有裂隙的多孔介质的非饱和渗流特性问题进行了初步探讨。文中简述了目前工程中遇到的各类有关渗透而导致的工程问题, 及含裂隙多孔介质渗流特性研究工作开展的必要性。并总结了孔隙介质的渗流特性和裂隙介质的渗流特性。介绍了孔隙介质、裂隙介质的土水特征曲线试验和渗透性函数的预测以及单裂隙渗流基本理论。开展了脱湿条件下土体裂隙扩展的室内模型试验, 并分析了裂隙几何参数的统计分布规律。根据裂隙的基本特征参数,基于拉丁方抽样( LHS )方法,实现了随机裂隙网络的生成。提出了一种考虑时间因子,按照时间步来生成随机裂隙的新方法,这种方法生成的随机裂隙形态和天然裂隙较为吻合。分析了等效连续介质模型用于裂隙岩土体渗流分析的必要条件,并基于 SEEP/W 软件,建立了等效连续介质模型,模拟分析了含裂隙岩土体的渗流特征及其规律。建立了二维离散裂隙网络模型,其中裂隙被概化为线单元构成的网络。编制了数值计算程序,开展了裂隙网络饱和非饱和渗流分析,展示了裂隙网络中非饱和渗流的特点。建立了二维裂隙孔隙介质模型,将裂隙线单元和二维多孔介质单元叠合,实现了用一套有限元网络同时计算裂隙和多孔介质中的非饱和渗流, 比双重介质模型更加简便和合理。编制了数值计算程序,通过两个算例展示了该模型的特点,并讨论了边界条件变化对含裂隙多孔介质渗流的影响。关键词: 裂隙多孔介质非饱和渗流裂隙生成三峡大学硕士学位论文 III Abstract Water flow in the fractured rock and soil formation of the moveme nt of the load on the dam, underground caverns, rock slope projects is security. Many researches were done on s aturated fracture flow problem s or unsaturated fractured po rous media problems that not contain the cracks in the past. Therefore, this paper summarize previous studies and base on bining the laboratory test and num erical simulation method, laws for crack extension, do a preliminary study on unsaturated seepage in fractured porous media. At the first, outlines the various types enc ountered in the current project related to engineering problems caused by infiltration and percolation characteri stics of porous media with cracks research work carried out by necessity. Summarizes the porous media flow characteristics and flow characteristics of fractured media. Introduce the porous media, fractured media, soil water characteristic cu rve and permeability f unction tests forecasts and the basic theory of a single fracture seepage. Carry out soil under drying conditions of th e indoor model crack propagation tests. Analysis he statistical fracture distribution of geometric parameters. Based on the Latin square sampling (LHS) method generate