【作者】 李连国；

【导师】 刘晓青；

【作者基本信息】 河海大学 ， 水工结构工程， 2007， 硕士

【摘要】 边坡稳定性分析一直是土木工程中的重要研究课题，在岩土工程或其它工程领域占据相当重要的地位。本文在乌江索风营Dr2危岩体稳定性分析与加固的基础上，通过用不同的方法对可能发生座滑、倾倒、滑移等多种失稳形式的对比分析，验证了所用计算分析方法以及加固方案的可行性与合理性。本文的主要研究内容包括：1、简单介绍了有限元的基本理论和有限元的求解思路，以及用矩形或长方体的常规实体单元描述平面或空间岩体问题中的软弱结构面的思路；2、阐述了边坡稳定分析常用的几种方法，即刚体极限平衡分析法、常规有限元法、逐步降低抗剪强度有限元法和非线性有限元迭代法，并对以上方法进行了分析比较，考虑实际边坡工程的特殊性，本文对危岩体进行降低抗剪强度有限元法和非线性有限元迭代法两种分析；3、研究该危岩体加固前、加固过程中及加固后的稳定性，为合理评价加固措施的合理性和加固效果提供科学依据。研究中不仅考虑各种复杂的地质条件(地形地貌、地层岩性、地层构造、断层、夹层及裂隙)和复杂的施工条件(废水渗漏引起的危岩体底部基座软岩加速软化及裂隙处理过程中流态混凝土产生的侧向压力等)，还考虑复杂加固措施(锚固洞、锚索、固结灌浆及抗滑桩等)的影响。4、研究成果给出了危岩体加固前、加固过程中及加固后的稳定性，对危岩体加固方案进行进一步优化，提出合理、系统的危岩体稳定及加固分析方法。更多还原

【Abstract】 Slope stability analysis has always been an important research topic in civil engineering. It occupies a very important position in Geotechnical Engineering and other engineering fields. Based on the Wujiang River Suofengyin Hydropower dangerous rocks’ stability and reinforcement, likely to use a different method of sliding blocks, dumped slip and other forms of instability comparative analysis come to agreement in the feasibility analysis and reinforced reasonable.In this paper, the main study includes :1、In this paper, I made a brief introduction to the basic theory of finite element and itssolution ideas, and use the conventional solid element of rectangle or cuboids to describe the weak structure of the plane or space rock entities;2、Expounding many common methods of slope stability analysis: rigid limit equilibriumanalysis, the conventional finite element method, gradually reducing the shear strength of the finite element method and the nonlinear finite element method, and also making an analysis and comparison of the methods above. Considering the peculiarity of actual slope, weak rock are analyzed with two methods—the finite element method and the non-linear finite element method.3、Studying the stability of dangerous rocks in three state: before, during and after the process of strengthening so as to provide a scientific basis for evaluating the reasonability and effect of the strengthening method reasonably. The study considers a lot of factors, not only complex geological conditions (topography, stratigraphy, lithology, structural faults and fissures and dissection ) and complicated construction conditions (caused by the leakage of dangerous rocks in the bottom of the base wastewater soft rock fissures and accelerate the process mid-stream attitude softened Concrete the lateral pressure, etc.)but also the influences of complex reinforcement measures (anchor cable, and consolidation grouting holes and sliding pile, etc.).4、Study results will be given the stability of the strengthening and reinforcement of the process of strengthening the stability, strengthening further optimization of the dangerous rocks, and also some advice has been given on the reinforcement method because there are still some problems.更多还原