土石坝的渗流特性分析及数值模拟
发布时间：2018-08-22 18:22
【摘要】：土石坝渗流特性分析对防止发生渗透破坏、减少渗漏损失具有重要意。随着世界各国对水资源合理运用的逐步重视,各类大型水利枢纽工程陆续兴建。土石坝具有结构简单、施工管理方便、对自然环境适应性强等突出特点,为世界坝工建设的优选坝型。由于土石坝存在渗流现象,而渗流问题轻则减少水库流量,重则可能导致溃坝及水库失事,影响大坝安全。因此,渗流特性分析在土石坝分析研究中是不可或缺的重要方面。 本文基于前人的研究成果,针对土石坝的渗流特性基本原理进行了详尽地探讨,同时针对土石坝渗流数值模拟过程进行了细致的分析研究。论文的主要内容概况如下： (1)收集整理了有关渗流方面的基础理论知识,阐述了渗流有限元分析的基本计算原理及具体实施方法,概括了数值模拟在土石坝渗流分析中的发展应用过程及重要作用。 (2)针对土石坝非饱和渗流分析中两个重要的渗流参数,即土-水特征曲线和非饱和渗透系数曲线进行专项研究,利用SPAW软件结合土体自身特性获取渗流参数,运用1stopt数据分析处理软件结合已成熟的渗流参数数学模型进行了数据拟合和修正。 (3)基于对比渗流场与温度场基础原理的相似性,得出了可以利用ANSYS软件中的热分析模块进行土石坝渗流分析研究的结论,并对具体研究中涉及到的理论进行了简要介绍。 (4)结合具体工程实例,利用ANSYS软件参数化设计语言(APDL)和其特有的“生死单元”技术,对土石坝稳定渗流过程进行了详细的数值模拟分析。 (5)简述了土石坝边坡稳定分析的基本理论,介绍了几种常用的基于极限平衡理论的边坡稳定分析方法,概述了边坡稳定分析的有限元法。 (6)结合实际工程,应用岩土工程技术分析软件GeoStudio中的地下水渗流分析模块(SEEP/W),对土石坝稳定-非稳定、饱和-非饱和渗流进行了细致的数值模拟分析；利用GeoStudio中的边坡稳定性分析模块(SLOPE/W)对渗流作用下的土石坝边坡进行了稳定性分析。 渗流特性分析在土石坝相关研究中占据重要地位,本文选取的分析研究方法、建立的渗流模型和涉及数值模拟结果是合理可靠的,可为土石坝建设提供参考。
[Abstract]:The analysis of seepage characteristics of earth-rock dam is important to prevent seepage damage and reduce leakage loss. With the attention of countries in the world to the rational use of water resources, all kinds of large-scale water-control projects are being built one after another. Earth-rock dam has the advantages of simple structure, convenient construction management and strong adaptability to natural environment. It is the best dam type for dam construction in the world. Because of seepage phenomenon in earth-rock dam, the seepage problem reduces the reservoir flow, and the heavy flow may lead to dam break and reservoir failure, which will affect the safety of the dam. Therefore, seepage analysis is an indispensable and important aspect in earth-rock dam analysis. Based on the previous research results, the basic principles of seepage characteristics of earth-rock dams are discussed in detail. At the same time, the numerical simulation process of seepage flow of earth-rock dams is analyzed in detail. The main contents of the paper are as follows: (1) the basic theoretical knowledge about seepage is collected and arranged, and the basic calculation principle and concrete implementation method of seepage finite element analysis are expounded. The development and application of numerical simulation in seepage analysis of earth-rock dams are summarized. (2) two important seepage parameters in unsaturated seepage analysis of earth-rock dams are discussed. That is, the soil-water characteristic curve and unsaturated permeability coefficient curve are studied, and the seepage parameters are obtained by SPAW software combined with the characteristics of soil. The 1stopt data analysis and processing software is used to fit and modify the data in combination with the mature mathematical model of seepage parameters. (3) based on the similarity between the basic principles of seepage field and temperature field, The conclusion that the seepage analysis of earth-rock dam can be carried out by using the thermal analysis module of ANSYS software is concluded, and the theory involved in the concrete research is briefly introduced. (4) combined with the concrete engineering example, By using ANSYS parametric design language (APDL) and its unique "life and death unit" technology, the numerical simulation of the steady seepage process of earth-rock dam is carried out in detail. (5) the basic theory of slope stability analysis of earth-rock dam is briefly described. This paper introduces several commonly used slope stability analysis methods based on limit equilibrium theory, and summarizes the finite element method for slope stability analysis. (6) combined with practical engineering, The groundwater seepage analysis module (SEEP/W) of geotechnical analysis software GeoStudio is used to simulate the steady unsteady saturated-unsaturated seepage of earth-rock dams in detail. Slope stability analysis module (SLOPE/W) of GeoStudio is used to analyze the slope stability of earth-rock dam under seepage. Seepage characteristic analysis plays an important role in the research of earth-rock dam. The analysis method, seepage model and numerical simulation results are reasonable and reliable, which can provide reference for earth-rock dam construction.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV641
本文编号：2197927
[Abstract]:The analysis of seepage characteristics of earth-rock dam is important to prevent seepage damage and reduce leakage loss. With the attention of countries in the world to the rational use of water resources, all kinds of large-scale water-control projects are being built one after another. Earth-rock dam has the advantages of simple structure, convenient construction management and strong adaptability to natural environment. It is the best dam type for dam construction in the world. Because of seepage phenomenon in earth-rock dam, the seepage problem reduces the reservoir flow, and the heavy flow may lead to dam break and reservoir failure, which will affect the safety of the dam. Therefore, seepage analysis is an indispensable and important aspect in earth-rock dam analysis. Based on the previous research results, the basic principles of seepage characteristics of earth-rock dams are discussed in detail. At the same time, the numerical simulation process of seepage flow of earth-rock dams is analyzed in detail. The main contents of the paper are as follows: (1) the basic theoretical knowledge about seepage is collected and arranged, and the basic calculation principle and concrete implementation method of seepage finite element analysis are expounded. The development and application of numerical simulation in seepage analysis of earth-rock dams are summarized. (2) two important seepage parameters in unsaturated seepage analysis of earth-rock dams are discussed. That is, the soil-water characteristic curve and unsaturated permeability coefficient curve are studied, and the seepage parameters are obtained by SPAW software combined with the characteristics of soil. The 1stopt data analysis and processing software is used to fit and modify the data in combination with the mature mathematical model of seepage parameters. (3) based on the similarity between the basic principles of seepage field and temperature field, The conclusion that the seepage analysis of earth-rock dam can be carried out by using the thermal analysis module of ANSYS software is concluded, and the theory involved in the concrete research is briefly introduced. (4) combined with the concrete engineering example, By using ANSYS parametric design language (APDL) and its unique "life and death unit" technology, the numerical simulation of the steady seepage process of earth-rock dam is carried out in detail. (5) the basic theory of slope stability analysis of earth-rock dam is briefly described. This paper introduces several commonly used slope stability analysis methods based on limit equilibrium theory, and summarizes the finite element method for slope stability analysis. (6) combined with practical engineering, The groundwater seepage analysis module (SEEP/W) of geotechnical analysis software GeoStudio is used to simulate the steady unsteady saturated-unsaturated seepage of earth-rock dams in detail. Slope stability analysis module (SLOPE/W) of GeoStudio is used to analyze the slope stability of earth-rock dam under seepage. Seepage characteristic analysis plays an important role in the research of earth-rock dam. The analysis method, seepage model and numerical simulation results are reasonable and reliable, which can provide reference for earth-rock dam construction.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV641
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