高速公路改扩建工程高边坡施工过程中运营安全风险评价

发布时间：2018-03-24 06:36

本文选题：高速公路改扩建工程　切入点：高边坡　出处：《长沙理工大学》2014年硕士论文

【摘要】：实施改扩建工程的高速公路经过的路线较长,沿线地形地貌、地质条件、旧路基现状均不相同,沿线高边坡的施工有可能会改变原有的支护方式,给边坡带来失稳风险,以致可能造成交通中断或严重的运营安全事故。此外,高边坡的施工会严重影响到原有高速公路上车辆的通行,从而带来发生交通事故的风险。这就需要施工前制定合理的施工和交通组织方案,以确保高边坡施工过程中高速公路运营畅通与安全。因此,结合改扩建高速公路高边坡施工对运营安全的影响特性建立运营安全风险评价体系就显得尤为重要。现阶段,国内外学者对运营安全风险等级判定的研究主要是从高速公路运营环境方面考虑的,虽然有些也考虑了道路条件、高边坡稳定性等因素,但较少有人考虑改扩建工程高边坡施工对运营安全的影响。为此,本文依托在建柳南高速公路改扩建工程,结合现场调研、数学建模及理论分析等方法对高速公路改扩建工程高边坡施工过程中的运营安全风险评价进行了深入的研究,得到以下主要成果：(1)对高速公路改扩建工程高边坡施工自身特性及其对运营安全的影响进行了分析,辨识出其中存在的风险源,确定了高边坡施工过程中运营安全的主要影响因素,并建立了高边坡施工过程中运营安全危险性评价指标体系。(2)建立了基于T-S模糊神经网络的高速公路改扩建高边坡施工过程中的运营安全危险性预测模型,并确立了危险性分级标准,以评估运营安全事故的危险性等级。(3)从承灾体的易损性和价值两个方面进行分析,建立了运营安全事故危害评价指标体系。基于层次分析法与模糊数学理论,建立了运营安全事故危害模糊综合评价模型,同时确定了危害等级划分标准,并采用VB语言编制了运营安全事故危害评价软件,初步实现了评估高边坡施工过程中运营安全事故危害的智能化和快速化。(4)将运营安全风险划分为五个等级,从运营安全危险性和事故危害两个指标建立了高边坡施工时运营安全风险综合评价体系,并对风险进行了表征。(5)以柳南高速公路改扩建工程中的小平阳高边坡进行实例研究,对采取不同施工和交通组织方案的情况作比较评价,根据评价结果判断风险的大小与来源,并据此做出风险管理与控制的决策。结果验证了本文评价方法的适用性和可靠性。
[Abstract]:The expressway carrying out the reconstruction and extension project passes through a long route, the topography and geomorphology along the line, geological conditions, the present situation of the old roadbed are all different, the construction of the high slope along the line may change the original supporting way and bring the risk of instability to the slope. In addition, the construction of the high slope will seriously affect the passage of vehicles on the existing highway. Therefore, it is necessary to draw up reasonable construction and traffic organization plan before construction to ensure the smooth and safe operation of expressway during the construction of high slope. It is very important to establish the risk evaluation system of operation safety by combining the influence characteristics of high slope construction on operation safety. Domestic and foreign scholars mainly consider the operational safety risk rating from the aspect of expressway operating environment, although some also take into account the road conditions, high slope stability and other factors. However, few people consider the impact of high slope construction on operation safety. Therefore, this paper relies on the reconstruction and extension project of Liunan Expressway under construction, combined with field investigation. Based on mathematical modeling and theoretical analysis, the risk assessment of operational safety in the construction of high slope of expressway reconstruction and extension project is studied deeply. The main achievements are as follows: 1) the characteristics of high slope construction in expressway reconstruction and extension project and its influence on operation safety are analyzed, and the existing risk sources are identified. The main influencing factors of operation safety in the construction process of high slope are determined. The evaluation index system of operational safety risk during the construction of high slope is established. (2) based on T-S fuzzy neural network, the prediction model of operational safety risk in the construction process of highway reconstruction and extension is established. And the risk classification standard is established to evaluate the risk grade of operational safety accidents. (3) the vulnerability and value of the disaster bearing body are analyzed from the aspects of the vulnerability and the value of the disaster bearing body. Based on the analytic hierarchy process (AHP) and fuzzy mathematics theory, the fuzzy comprehensive evaluation model of operational safety accident hazard is established. Using VB language, the software of operational safety accident hazard evaluation is compiled, and the intelligent and rapid operation safety hazard assessment software is preliminarily realized in the process of high slope construction. The operational safety risk is divided into five grades. The comprehensive evaluation system of operational safety risk in construction of high slope is established from the two indexes of operational safety risk and accident hazard, and the risk is characterized by the example of Xiaopingyang high slope in the reconstruction and extension project of Liunan Expressway. This paper makes a comparative evaluation of different construction and traffic organization schemes, judges the size and source of the risk according to the evaluation results, and makes the decision of risk management and control accordingly. The results verify the applicability and reliability of the evaluation method in this paper.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U418.8

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