滇西南地区高速公路高边坡调查及抗震稳定性分析

发布时间：2018-06-30 05:43

本文选题：边坡工程 + 地震力　；参考：《长安大学》2015年硕士论文

【摘要】：随着我国基础设施建设在西部多山地区的快速的发展,必然会产生大量的边坡。另外我国大部分地区多地震,尤其是云南的西南部地区。这就使得研究地震力作用下边坡的稳定性具有实际意义。地震力作用下边坡稳定问题一直是岩土工程领域中重要的研究课题。目前,规范中多采用比较传统的安全系数法来进行边坡设计和稳定性分析,常把地震力当作静力对待,并没有考虑到地震力和其他影响因素的不确定性和随机性。因此,本文以滇西南地区的大理至保山线和保山至龙陵线两条高速公路为依托工程,从可靠性的角度对地震力作用下边坡稳定性进行概率分析。主要的工作内容如下:1.详细调查了滇西南地区的工程地质和历年震害情况,并对依托工程大保线和保龙线进行了实地调查和综合分析。2.阐述了可靠性理论的基本概念,论述了边坡可靠性常用方法的原理和优、缺点,并对多种边坡稳定极限平衡分析法进行了比较。最后选择验算点法进行边坡的可靠性分析,并利用传递系数法推导了考虑地震力和边坡加固力的功能函数,以此建立了基于传递系数法和验算点法的可靠性分析模型。3.根据工程调研和相关的文献资料,确定了地震力作用下边坡可靠性分析的主要参数为抗剪强度指标和地震水平峰值加速度,并确定了其分布类型,统计并计算地震水平峰值加速度的均值和标准差。4.通过某简单均质边坡的可靠性计算,分析了抗剪强度参数之间的相关性、随机变量的变异性、加固力和加固角度、步长系数对可靠指标的影响,并编制了相应的MATLAB程序。对两处典型的高边坡进行了加固前、后的可靠性分析,并用传递系数法对本文建立的可靠性分析模型进行验证。
[Abstract]:With the rapid development of infrastructure construction in mountainous areas in western China, a large number of slopes will be produced. In addition, there are many earthquakes in most areas of China, especially in the southwest of Yunnan. This makes the study of slope stability under earthquake force has practical significance. Slope stability under seismic force has been an important research topic in geotechnical engineering field. At present, the traditional safety factor method is often used in the design and stability analysis of slope. Seismic force is often treated as static force, and the uncertainty and randomness of seismic force and other influencing factors are not taken into account. Therefore, based on the two freeways from Dali to Baoshan and Baoshan to Longling in southwest Yunnan, the probability analysis of slope stability under seismic force is carried out from the point of view of reliability. The main tasks are as follows: 1: 1. The engineering geology and earthquake damage over the years in southwest Yunnan were investigated in detail, and the field investigation and comprehensive analysis were carried out on the line of relying on the Great Protective Line and Baolong Line of the Project. This paper expounds the basic concept of reliability theory, discusses the principle, advantages and disadvantages of the common methods of slope reliability, and compares several kinds of slope stability limit equilibrium analysis methods. Finally, the reliability analysis of slope is carried out by means of checking point method, and the function considering seismic force and slope reinforcement force is deduced by using transfer coefficient method, and the reliability analysis model based on transfer coefficient method and checking point method is established. According to engineering investigation and related documents, the main parameters of slope reliability analysis under earthquake force are determined as shear strength index and seismic horizontal peak acceleration, and its distribution type is determined. Statistic and calculate the mean value and standard deviation of the peak acceleration of earthquake level. 4. Through the reliability calculation of a simple homogeneous slope, the correlation between shear strength parameters, variability of random variables, reinforcement force, reinforcement angle, step coefficient and reliability index are analyzed, and the corresponding MATLAB program is compiled. The reliability analysis of two typical high slopes before and after reinforcement is carried out, and the reliability analysis model established in this paper is verified by transfer coefficient method.
【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】：U416.14

【参考文献】