【作者】 李康宏；

【导师】 柴军瑞；

【作者基本信息】 西安理工大学 ， 水工结构工程， 2006， 硕士

【摘要】 由于降雨而引起的边坡滑坡、大坝失事事故的不断加剧，使得降雨条件下裂隙岩体非饱和渗流的研究具有重要意义。本文在总结国内外有关裂隙岩体非饱和渗流成果的基础上，对裂隙岩体非饱和渗流特点、概念模型、数学模型、本构关系以及理论模型进行了总结和进一步研究，建立了裂隙网络非饱和渗流数学模型，取得了如下结论： 1．裂隙岩体非饱和渗流概念模型、数学模型均只是模型理论在裂隙岩体渗流中的实际应用；同时，它们是互相关联的，前者是后者的基础，后者则是前者定量化的表现：各种非饱和渗流数学模型相互独立，同时，也互为基础，相互关联，均有各自的适用范围和特点。 2．目前的裂隙岩体非饱和渗流本构关系曲线主要还是以毛管理论为主，不考虑岩体的基质作用，而且对渗流其它特点的渗流曲线模型几乎没有；在进行渗流分析时参照已有试验成果，减少了成本，又使得研究能够顺利进行，同时能够充分利用已有成果；在选择模型时，应根据裂隙不同情况选用合适的拟合关系模型；已有研究曲线均是在无应力状态下进行的，数据仅反映无应力条件下单裂隙非饱和渗流的基本特征，对于复杂应力状态下单裂隙非饱和排泄和吸湿过程的实验研究有待于进一步进行；已有关系曲线均是结合孔隙介质模型拟合得出相关经验参数，而实际裂隙渗流更复杂，因此这些模型尚需更多试验来进行检验。 3．运用所推导得出的裂隙网络非饱和渗流数学模型进行实例分析，结果表明该模型能够正确反映裂隙岩体非饱和渗流分布状况，所计算结果与所选取本构关系、本构关系中的拟合参数、计算初始条件以及选取时间间隔有很大的关系。 4．最后根据某尾矿库区实际的钻孔资料和工程地质与水文地质勘察结果，建立用于渗透参数反演分析的整个尾矿库区三维有限元网格模型，为确定该尾矿库区各分区模型渗透参数奠定基础。可以看出，基于实际钻孔资料建立渗透参数反演分析有限元模型是解决实际工程问题的一种很实用而有效的方法。更多还原

【Abstract】 The increasing severity of slope failure and dam failure, make the unsaturated seepage through fracture network one of the key issues. Based on the review of national and international research on unsaturated seepage through fracture network, the characteristics of unsaturated seepage through fracture network, concept models, mathematical models, constitutive relations and the theoretical models are summarized and established. Major findings are as follows:1. The concept models and mathematical models for unsaturated seepage through fracture network during rainfall are just only the application of models to the fracture network seepage; at the same time they are associated each other, the form one is the foundation of the later one, and the later one is the quantitative reflection of the former one. Each mathematical model is an independent one, they are relative with others and foundation to others, and each one has its own characteristic and applicable scope.2. The curves of constitutive relation of the unsaturated seepage through fracture network are mainly based on the capillary channel theory, not considering the matrix suction, and there are not curves which can reflect the other characteristics of the unsaturated seepage through fracture network hardly; the experimental results, which are summarized from many other researches, are used during seepage simulation, so that the costs is reduced, and the research are continued all right, at the same time, the studied results are used sufficiently; during choosing the curves, we should choose the appropriative model of curves according the different distribution of the fracture network; all the curves in the papers are used in the situation not considering the stress on the fracture, the results just only reflect the basic characteristics of the unsaturated seepage through one single fracture under not considering the stress, the experimental researchs about the drainage and sucking process in the single unsaturated fractured considering the complex stress should be studied; the concluded curves all are experienced one following the pore medium model, but the practical seepage through fracture are more complex, so the concluded models need to be tested by more experiments.更多还原