公路边坡抗震稳定性的敏感性因素分析

发布时间：2018-01-06 21:38

本文关键词：公路边坡抗震稳定性的敏感性因素分析　出处：《长安大学》2014年硕士论文　论文类型：学位论文

更多相关文章： 公路边坡 地震力 敏感度 安全系数

【摘要】：20世纪以来，随着国民经济的快速增长，我国的交通事业也得到了迅猛发展。在高速公路建设过程中，将会遇到大量的公路边坡。然而，公路边坡的安全性容易受到外界环境影响。我国是一个地震多发国家，边坡的稳定性受到地震力作用，崩塌、失稳现象时有发生，且地震发生的随机性和不可测性，，以致在地震作用下边坡稳定性的研究内容十分复杂。为了减少地震作用对公路边坡稳定性的影响，本文针对公路边坡抗震稳定性分析中敏感性因素问题，以十天高速公路陕西路段为依托，建立敏感性参数分析系统，探讨各个影响因素的变化对公路边坡稳定性的影响，主要工作包括以下几个方面：（1）对国内外公路边坡抗震稳定性的相关资料开展了较系统的调研和检索，分析了地质构造、岩土体结构类型、地层岩性、地形地貌、水文地质条件、地震荷载等因素对公路边坡抗震稳定性的影响。（2）在国内外资料调研、工程调查的基础上，对公路边坡滑动失稳机理和抗震稳定性分析方法开展了较为深入的研究，同时引入公路边坡抗震稳定性的最小安全系数计算方法及所编制的计算软件，对公路边坡抗震稳定性进行计算分析。（3）基于公路边坡抗震稳定性的最小安全系数计算方法及所编制的计算软件，建立敏感性参数分析系统。利用该系统对公路边坡中的不同边坡形态（直线型、下陡上缓平台台阶型、下缓上陡平台台阶型）进行敏感性参数分析：得出地震作用下公路边坡安全系数与各个影响因素之间的变化规律、各个影响因素对边坡安全系数的影响程度（敏感度）。（4）以十天高速公路陕西路段为依托工程，在对工程工作区地震安全评价的基础上，结合地质勘探、岩土参数取样试验，选择了一处典型边坡工程进行敏感性参数分析，验证本文所得出的敏感性分析方法的准确性。
[Abstract]:Since 20th century, with the rapid growth of the national economy, China's transportation industry has also been rapid development. In the process of highway construction, there will be a large number of highway slopes. The safety of highway slope is easy to be affected by external environment. China is an earthquake-prone country, the stability of slope is affected by earthquake force, collapse and instability occur from time to time. Because of the randomness and undetectability of earthquake occurrence, the study of slope stability under earthquake is very complicated. In order to reduce the influence of earthquake action on highway slope stability. Aiming at the problem of sensitivity factors in seismic stability analysis of highway slope, a sensitivity parameter analysis system based on Shaanxi section of 10-day expressway is established in this paper. This paper discusses the influence of various influencing factors on the stability of highway slope. The main work includes the following aspects: 1) the relative data of seismic stability of highway slope at home and abroad are systematically investigated and searched, and geological structure, structure type of rock and soil, stratigraphic lithology, topography and geomorphology, hydrogeological conditions are analyzed. The influence of earthquake load and other factors on the seismic stability of highway slope. 2) based on the investigation of domestic and foreign data and engineering investigation, the mechanism of sliding instability and seismic stability analysis method of highway slope are studied deeply. At the same time, the calculation method of minimum safety factor and the calculation software are introduced to calculate and analyze the seismic stability of highway slope. (3) the calculation method of minimum safety factor based on seismic stability of highway slope and the calculation software. The sensitivity parameter analysis system is established. The system is used to analyze the different slope shapes (linear type, steep up and gentle platform step type) in the highway slope. The sensitivity parameter analysis is carried out: the variation law between the safety factor of highway slope and the influencing factors under earthquake action is obtained. The influence of each factor on slope safety factor (sensitivity). On the basis of seismic safety evaluation of the work area of the Shitian Expressway in Shaanxi Province, combined with geological exploration, the geotechnical parameter sampling test is carried out. The sensitivity parameter analysis of a typical slope engineering is carried out to verify the accuracy of the sensitivity analysis method obtained in this paper.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.14

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