【作者】 张永明；

【导师】 符锌砂；

【作者基本信息】 华南理工大学 ， 道路与铁道工程， 2011， 硕士

【摘要】 泥质红砂岩作为一种具有特殊工程性质的岩石,在受湿度、温度影响的情况下,容易风化、崩解,层间剪切带逐渐被泥化,使其长期强度降低。在道路建设中使用泥质红砂岩修筑路基和边坡时,极易发生失稳破坏,严重影响道路的稳定性和耐久性。论文根据泥质红砂岩的地质成因、矿物成分、节理、裂隙的发育程度及物理力学性质,对泥质红砂岩边坡的处理技术进行研究。论文通过对红砂岩的形成环境、矿物成份、地形与排水条件、风化过程、风化机理的探讨,提出了基于坡体结构的红砂岩边坡边坡类型分类方法,通过对红砂岩边坡变形破坏机制进行分析,得出了岩性、岩体结构面、坡度、风化作用、暴雨等影响红砂岩边坡稳定的主要因素。论文分析了红砂岩层间的软弱夹层情况,通过对红砂岩进行蠕变等实验,了解红砂岩的岩性,获取相应的岩质参数,在此基础上,建立了边坡的仿真分析模型,对红砂岩边坡进行了稳定性模拟分析,并利用ABAQUS软件进行边坡的强度折减有限元分析。论文通过对红砂岩边坡各种不同形式防治措施进行研究,提出红砂岩边坡的治理原则,以及适合红砂岩路堑边坡的防治方案;通过改变边坡的几何要素、外部排水条件、内部排水条件等,达到边坡的稳定防护的目的;通过对边坡生态防护机理的研究,提出岩质边坡的生态防护方法和治理思路。本文的研究,可以为泥质红砂岩边坡设计及处治提供依据,对降低工程造价、保护环境、提高红砂岩分布地区道路的强度和稳定性具有重要意义。更多还原

【Abstract】 Muddy red sandstone, as a special engineering property of rocks, is easy to weathering, disintegrate, be muddied of interlaminar shear band gradually, which make them long-term strength decreased by humidity and temperature of the circumstances. During the road construction, by using red sandstone to built roadbed and muddy slope, the unstable failure occurred highly, which affect the stability and durability of the road seriously. The paper, which based on the geological causes, mineral composition, joint, fracture development extent and physical and mechanical properties of muddy red sandstone, makes the treatment technology research on the muddy sandstone slope.Through the discussion of formation environment of red sandstone, mineral composition, topography and drainage conditions, weathering, weathering mechanism, the paper puts forward red sandstone slope classification based on the structure. By analyzing the slope failure mechanisms of the red sandstone, the paper reaches a conclusion that the lithology, structure, surface rock, slope, weathering, heavy rain are the factors affecting the slope stability of red sandstone. The paper analyzes the situation between the soft interlayer, obtains the corresponding rock parameters through the experiments of creep test. Based on those, it established simulation analysis model of cutting slope, which are used to make the stability analyze and make the finite element analysis of strength reduction by using the software ABAQUS. The paper, through the researches on various forms of red sandstone slope control measures, conducts the governance principles of red sandstone slope and treatment programs suited for the prevention of the red sandstone slope. It achieves the purpose of slope stability protection by changing the slope geometric elements, external drainage, and internal drainage conditions. It proposes rock slope ecological protection methods and management thinking through the study of slope protection mechanism.This study can provide a basis for the muddy slope design and treatment and it has the significance to reduce cost, protect the environment, and improve the strength and stability on the red sandstone roads.更多还原