岩质边坡稳定性数值分析研究
发布时间：2018-10-09 10:32
【摘要】：目前我国处于经济建设的快速增长期,各类公路桥梁及民用建筑的数量也在快速增长。在以上工程的选址和施工过程中经常会出现大量的岩质边坡。当边坡发生较大变形或破坏时会导致众多严重的后果,其不仅会造成工程本身的损毁,还有可能造成重大的经济损失和人员伤亡。因此岩质边坡的稳定性问题也开始受到更多的关注。首先岩石是由许多孔隙、多种矿物晶粒以及胶结物组成的混合体。在历经亿万年的地质演变以及复杂地构造运动后,岩石会含有随机分布的微孔隙与裂纹。在宏观尺度上,天然岩体又被多种地质构造面(节理、断层和弱面)所切割。这些重要的特点使岩石成为一种复杂而又特殊的材料,它不是离散介质,也不是连续介质,而是属于连续与离散的耦合介质。边坡发生变形和破坏是一个长期的变化过程,其稳定性受边坡内在因素和外部因素等多种条件的影响。内部因素包括:组成边坡的岩土体类型及性质、边坡地质构造、边坡形态等;外部因素包括:气候条件、风化作用、坡体植被、人类工程活动等。在一定的工程地质条件下,有些因素对边坡稳定性影响较大,而有些则较小。这就是说影响因素对边坡失稳的贡献是不同的。找出边坡失稳主要影响因子对边坡失稳灾害的防治及人工边坡的设计具有重要意义。本文基于强度折减法,应用ABAQUS有限元分析软件对边坡的主要内在因素进行计算分析,探究其对边坡失稳和变形的影响水平并进行研究。研究结果表明:边坡的安全系数Fs与其中一些影响因素的关系显著。借助各影响因素的分析结果,将有利于针对主要影响因素对边坡进行加固处理。
[Abstract]:At present, China is in the period of rapid economic growth, and the number of highway bridges and civil buildings is also growing rapidly. A large number of rock slopes often occur during the site selection and construction of the above projects. When the slope is deformed or destroyed, it will lead to many serious consequences, which will not only cause damage to the project itself, but also may cause serious economic losses and casualties. Therefore, more attention has been paid to the stability of rock slope. First, rock is a mixture of many pores, a variety of mineral grains, and cementation. After billions of years of geological evolution and complex tectonic movement, rocks contain randomly distributed micropores and cracks. On macro scale, natural rock mass is cut by various geological structural planes (joints, faults and weak planes). These important characteristics make rock become a kind of complex and special material. It is not a discrete medium nor a continuum medium, but a continuous and discrete coupling medium. Slope deformation and failure is a long-term process of change, and its stability is affected by many conditions, such as internal factors and external factors. The internal factors include the types and properties of the rock and soil, the geological structure of the slope, the shape of the slope and so on, while the external factors include: climatic conditions, weathering, slope vegetation, human engineering activities and so on. Under certain engineering geological conditions, some factors have great influence on slope stability, while some factors have little effect on slope stability. This means that the contribution of influencing factors to slope instability is different. Finding out the main influencing factors of slope instability is of great significance to the prevention of slope instability and the design of artificial slope. In this paper, based on the strength reduction method, the main internal factors of slope are calculated and analyzed by using ABAQUS finite element analysis software, and the influence level on slope instability and deformation is explored and studied. The results show that the safety factor (Fs) of the slope is significantly related to some of the influencing factors. With the help of the analysis results of various influencing factors, it will be advantageous to reinforce the slope according to the main influencing factors.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU457
[Abstract]:At present, China is in the period of rapid economic growth, and the number of highway bridges and civil buildings is also growing rapidly. A large number of rock slopes often occur during the site selection and construction of the above projects. When the slope is deformed or destroyed, it will lead to many serious consequences, which will not only cause damage to the project itself, but also may cause serious economic losses and casualties. Therefore, more attention has been paid to the stability of rock slope. First, rock is a mixture of many pores, a variety of mineral grains, and cementation. After billions of years of geological evolution and complex tectonic movement, rocks contain randomly distributed micropores and cracks. On macro scale, natural rock mass is cut by various geological structural planes (joints, faults and weak planes). These important characteristics make rock become a kind of complex and special material. It is not a discrete medium nor a continuum medium, but a continuous and discrete coupling medium. Slope deformation and failure is a long-term process of change, and its stability is affected by many conditions, such as internal factors and external factors. The internal factors include the types and properties of the rock and soil, the geological structure of the slope, the shape of the slope and so on, while the external factors include: climatic conditions, weathering, slope vegetation, human engineering activities and so on. Under certain engineering geological conditions, some factors have great influence on slope stability, while some factors have little effect on slope stability. This means that the contribution of influencing factors to slope instability is different. Finding out the main influencing factors of slope instability is of great significance to the prevention of slope instability and the design of artificial slope. In this paper, based on the strength reduction method, the main internal factors of slope are calculated and analyzed by using ABAQUS finite element analysis software, and the influence level on slope instability and deformation is explored and studied. The results show that the safety factor (Fs) of the slope is significantly related to some of the influencing factors. With the help of the analysis results of various influencing factors, it will be advantageous to reinforce the slope according to the main influencing factors.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU457
【参考文献】
相关期刊论文 前10条
1 刘学昆;崔n，
本文编号：2259008
本文链接：https://www.wllwen.com/kejilunwen/diqiudizhi/2259008.html
