黄蒿洼边坡变形破坏机理与稳定性研究-地质工程专业毕业论文.docxVIP

i i PAGE PAGE iv 摘 要 边坡变形破坏机理及稳定性问题是目前岩土工程领域的热点和较为棘手的问题。越 来越多的山区工程建设中不可避免的遭遇到了边坡变形破坏的影响。对于不同边坡的结 构类型、变形破坏模式及机理等方面的深入研究便体现出其必要性。本文主要以黄蒿洼 边坡为主要研究对象，在地质资料收集、现场详细勘察的基础上，对黄蒿洼边坡进行了 结构类型划分和稳定性影响因素分析，结合有限元数值模拟对该边坡变形破坏模式及机 理进行了系统研究，并对其稳定性进行了评价，主要开展了以下研究工作： （1）以黄蒿洼边坡为研究对象，通过对现场勘察资料的整理，结合对现有边坡资 料的归纳总结，对黄蒿洼边坡的结构类型、变形破坏模式进行分类研究。 （2）从影响边坡稳定性的初始点和过程方面入手，将影响边坡稳定性的因素分为 内部和外部因素。对影响黄蒿洼边坡稳定性的内部及外部因素进行了深入研究。 （3）建立黄蒿洼边坡不同组合类型的数值模型，采用 Midas GTS 有限元模拟软件 对其进行数值模拟分析，通过分析边坡不同区段在不同工况下应力应变变化情况，对黄 蒿洼边坡变形破坏机理进行了研究。 （4）研究对比不同的边坡稳定性评价理论和方法，采用极限平衡法原理中的瑞典 条分法、Bishop 法和 Janbu 法对不同结构类型边坡进行稳定性计算，对比有限元数值模 拟强度折减法的结果，结合边坡稳定程度的定性分析，对黄蒿洼边坡稳定性进行了综合 评价。 以上研究得出的结论对研究土质边坡变形破坏机理及黄蒿洼边坡防治工作具有一 定的参考价值。 关键字：黄蒿洼边坡，结构类型，破坏模式，破坏机理，有限元模拟，稳定性分析 Abstract The deformation failure and the stability of slope are now the hotspots and urgent problems in the field of geotechnical engineering. Inevitably, more and more construction that been carried out in the mountain area are suffering from the slope deformation and failure. So its necessary to do further study on the structure, type, mode of deformation and failure and mechanism of different slope. This paper has conducted a research on Huanghaowa slope, based on collected geological data, detailed field investigation, through the analysis of the type of Huanghaowa slope and its stability influencing factors, used finite element numerical simulation to do a systemic research of the slope deformation and failure mode and mechanism were involved in, and evaluated its stability, we carried out the following work: Taking Huanghaowa slope deformation failure as an example, by organizing the field investigation data, combined with the existing slope research data summary, studying and analyzing the structure, type and deformation failure mode of Huanghaowa slope. Dividing the facotrs that affect slope stability into internal ones and external ones from the initial point and process that affecting the stability of the slope, conducted a further study on the internal and external f