【作者】 韩文涛；

【导师】 党发宁；

【作者基本信息】 西安理工大学 ， 岩土工程， 2006， 硕士

【摘要】 我国水利水电事业的快速发展，促使了众多大型水利工程的兴建。在这些工程中普遍都存在着浑水渗流的问题，但目前所有解决浑水渗流的方法实质上是基于清水的渗流理论，其中忽略了泥砂的影响，这必然与实际问题不太相符，也导致所得的结果有很大的偏差。本文针对岩土工程界浑水入渗、出渗这一普遍问题，提出了解决此问题的新方法。在达西定律的基础上，推导出了浑水入渗、出渗的理论计算公式，并给出了求解浑水入渗、出渗微分方程的差分形式，通过算例验证了浑水入渗计算公式的正确性，浑水出渗的三维计算结果则同毛昶熙细砂模型试验结果进行了对比分析，证实了该方法的可行性，显示了有限元数值模拟的优势。 对垂直防渗墙、水平铺盖防渗措施及两者同时应用时的防渗效果进行了计算分析研究，结果显示：防渗墙的深度、水平铺盖的长度与防渗效果成正比，封闭式防渗墙防渗效果最为显著，半封闭式防渗墙次之，悬挂式防渗墙相对较差。垂直防渗墙和水平防渗铺盖同时应用时，比相同条件下其中任一种防渗措施效果明显。就三种不同防渗措施比较而言，各自都有其优缺点。从防渗效果上来说，垂直防渗墙效果最为佳，联合使用的防渗措施相对次之，水平铺盖防渗相对最次。 由于悬挂式防渗墙防渗效果不佳而又在工程实际中，不得不使用。从此问题出发，本文结合大渡河瀑布沟水电站上游围堰的具体实际工程，对悬挂式防渗墙进行了防渗效果计算。通过对三种不同深度的防渗墙设计方案进行三维有限元计算分析，对工程选择最有利的方案，为工程的顺利、安全进行打下了基础。更多还原

【Abstract】 With the rapid development of the hydro-electric industry, a lot of hydro-electric projects are built. The muddy water seep and the foundation of the dam generally exist in those projects, but all of the methods used in the solving the muddy water seep are based on the theory of the rinsing seep which ignores the effect of the sand and mud. This do not completely match with the fact so that the result is not true. In this article, a new method which is used to solve the filter-in and seep-out of muddle water is put forward. At the base of Darcy’s Law, new theoretical equations and their partial differential equations about the filter-in and seep-out of muddle water is also brought forth. Some engineering projects validate the theoretical equations. In the end, three dimensions numerical results about the seepage-out of muddle water are contrasted with Mao changxi’s model test results, it is concluded that the method is feasible and have unexampled superiority in speed and precision.The impervious effects, When vertical cut-of-wall and horizontal cut-of-wall are both used, are studied, as well as vertical cut-of-wall or horizontal cut-of-wall is solely used. The following conclusions are drawn: the depth of vertical cut-of-wall and the length of horizontal cut-of-wall are both in direct proportion to impervious effects, meanwhile, the impervious effects of close cut-of-wall take the first place, the seepage-proofing effects of semi-close cut-of-wall take the second place, and , the impervious effects of suspended cut-of-wall is comparatively not so good. The impervious effects, when vertical cut-of-wall and horizontal cut-of-wall are both used, are better than when vertical cut-of-wall or horizontal cut-of-wall is solely used. As for the three impervious measures, they all have their strongpoint and weaknesses, moreover, the effects of the vertical cut-of-wall is the best, the effects of the horizontal cut-of-wall is relatively the worst of all and when they both are used the effects of the impervious come to the second place.As it is well known, the effects of the suspended cut-of wall are not very ideal but it has to be used in reality. Thus, at the base of the project of the upriver cofferdam in DaDuHe PuBuGou hydroelectric station. The design of the suspended cut-of-wall by comparing the更多还原