层状岩质斜坡坡体结构及其效应研究

发布时间：2018-02-27 01:15

本文关键词： 层状岩质斜坡坡体结构变形破坏破坏模式　出处：《兰州大学》2015年硕士论文　论文类型：学位论文

【摘要】：斜坡问题是工程建设中最常见的地质问题之一,可能会导致严重的地质灾害。层状岩质斜坡不仅分布最为广泛,灾害频发,而且坡体结构、变形破坏特征复杂多样,成为制约着工程实践重大的地质问题。目前,层状岩质斜坡研究缺乏系统性的研究,缺乏普遍的实用性。基于此,本文针对层状岩质斜坡基本特征,丰富了层状岩质斜坡的坡体结构的概念,充分考虑岩层产状、临空面、岩性组合、岩体结构面特征,全面系统地构建了层状岩质斜坡坡体结构分类体系。然后以坡体结构为纽带论述了层状岩质斜坡变形破坏的坡体结构效应及其相对性、复合性和动态转化性。最后以茨哈峡水电站坝址区层状岩质斜坡为例进行坡体结构分类,讨论了其坡体结构特征,并分析了茨哈峡坝址区库岸斜坡变形破坏基本特征,从而为后期斜坡稳定性评价以及工程措施提供理论依据。主要研究成果如下：(1)总结归纳前人大量研究成果的基础上,较为准确地给出层状岩质斜坡坡体结构的概念。进一步以层产状与临空面组合关系为主,同时考虑岩性组合、结构面组合关系特征,建立了层状岩质斜坡坡体结构的系统性分类,进而详细阐述了各类坡体结构的基本特征。(2)基于上述层状岩质斜坡坡体结构类型特征,以工程地质分析为指导,利用数值模拟计算方法,进一步探讨变形破坏模式以及动态演化过程,从而强调了坡体结构特征与变形破坏之间的对应关系,并且强调这种对应关系的相对性、复合性、动态性以及转化性。(3)基于上述建立了层状岩质斜坡坡体结构概念→层状岩质斜坡坡体结构类型→层状岩质斜坡坡体结构特征→层状岩质斜坡变形破坏的坡体效应研究体系,以茨哈峡水电站坝址区层状岩质斜坡提供的天然数据库为依托,从坡体结构角度出发,科学合理地分析了茨哈峡坝址库岸斜坡变形破坏特征。
[Abstract]:The slope problem is one of the most common geological problems in engineering construction, which may lead to serious geological hazards. Stratified rock slopes are not only the most widely distributed, frequent disasters, but also the slope structure, deformation and failure characteristics are complex and diverse. At present, the study of stratiform rock slopes lacks systematic research and general practicability. Based on this, this paper aims at the basic characteristics of layered rock slopes. It enriches the concept of slope structure of stratified rock slope, and fully considers the occurrence of rock layer, the face of space, the combination of lithology, and the characteristics of rock mass structural plane. A comprehensive and systematic classification system of slope structure of layered rock slope is constructed, and then the slope structure effect and its relativity of deformation and failure of layered rock slope are discussed by means of slope body structure. Finally, taking the stratified rock slope in the dam site of Zha Gorge Hydropower Station as an example, the slope structure characteristics are discussed, and the basic characteristics of deformation and failure of the reservoir bank slope in the Zha Gorge dam site are analyzed. Thus providing a theoretical basis for the later slope stability evaluation and engineering measures. The main research results are as follows: 1) on the basis of summing up and summarizing a large number of previous research results, The concept of slope structure of stratified rock slope is given more accurately. Further, the relationship between the occurrence of the layer and the face of the void is considered, and the characteristics of the combination of the lithology and the structural plane are taken into account at the same time. The systematic classification of slope body structure of layered rock slope is established, and the basic characteristics of various slope body structures are expounded in detail. Based on the characteristics of slope body structure of layered rock slope mentioned above, engineering geological analysis is used as the guide. Using the numerical simulation method, the deformation failure mode and the dynamic evolution process are further discussed, thus emphasizing the corresponding relation between the structural characteristics of slope and the deformation and failure, and emphasizing the relativity and compounding of the corresponding relation. Based on the above, the concept of slope structure of layered rock slope is established. 鈫扴lope structure types of layered rock slopes. 鈫扴tructural characteristics of layered Slope Slope. 鈫払ased on the natural database provided by stratified rock slopes in the dam area of Zha Gorge Hydropower Station, the study system of slope effect on the deformation and failure of layered rock slopes is based on the slope structure. The deformation and failure characteristics of the slope on the bank of the Zha Gorge dam site are analyzed scientifically and reasonably.
【学位授予单位】：兰州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P642.22

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