黄蒿洼边坡变形破坏机理与稳定性研究

发布时间：2018-09-09 17:41

【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。
[Abstract]:Slope deformation and failure mechanism and stability are hot and difficult problems in the field of geotechnical engineering. More and more mountain projects inevitably encounter the influence of slope deformation and failure. It is necessary to study the structure type, deformation failure mode and mechanism of different slope. In this paper, the main research object is the Artemisia Artemisia slope. On the basis of the geological data collection and field detailed investigation, the structural type classification and the factors affecting the stability of the Artemisia annua slope are analyzed. Combined with finite element numerical simulation, the deformation and failure mode and mechanism of the slope are studied systematically, and the stability of the slope is evaluated. The main research work is as follows: (1) taking the Artemisia annua slope as the research object, Through sorting out the field survey data and summarizing the existing slope data, the structural types and deformation and failure modes of Artemisia annua slope are classified and studied. (2) starting from the initial point and process that affect the slope stability, The factors affecting slope stability are divided into internal and external factors. The internal and external factors affecting the stability of Artemisia annua slope are deeply studied. (3) the numerical model of different combination types of Artemisia annua slope is established, and the numerical simulation analysis is carried out by using Midas GTS finite element simulation software. The deformation and failure mechanism of Artemisia annua slope is studied by analyzing the variation of stress and strain in different sections of slope under different working conditions. (4) the different theories and methods of slope stability evaluation are studied and compared. The stability of slopes of different structural types is calculated by using the Swedish Strip-Bishop method and Janbu method in the principle of limit equilibrium. The results of the strength reduction method of finite element numerical simulation are compared with the qualitative analysis of the slope stability degree. The stability of Artemisia annua slope is evaluated. The above conclusions are valuable for studying the mechanism of soil slope deformation and failure and the prevention and treatment of Artemisia annua slope.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P642.22

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