本文選題：高速公路改擴建工程　切入點：高邊坡　出處：《長沙理工大學》2014年碩士論文

【摘要】：實施改擴建工程的高速公路經(jīng)過的路線較長,沿線地形地貌、地質條件、舊路基現(xiàn)狀均不相同,沿線高邊坡的施工有可能會改變原有的支護方式,給邊坡帶來失穩(wěn)風險,以致可能造成交通中斷或嚴重的運營安全事故。此外,高邊坡的施工會嚴重影響到原有高速公路上車輛的通行,從而帶來發(fā)生交通事故的風險。這就需要施工前制定合理的施工和交通組織方案,以確保高邊坡施工過程中高速公路運營暢通與安全。因此,結合改擴建高速公路高邊坡施工對運營安全的影響特性建立運營安全風險評價體系就顯得尤為重要�，F(xiàn)階段,國內外學者對運營安全風險等級判定的研究主要是從高速公路運營環(huán)境方面考慮的,雖然有些也考慮了道路條件、高邊坡穩(wěn)定性等因素,但較少有人考慮改擴建工程高邊坡施工對運營安全的影響。為此,本文依托在建柳南高速公路改擴建工程,結合現(xiàn)場調研、數(shù)學建模及理論分析等方法對高速公路改擴建工程高邊坡施工過程中的運營安全風險評價進行了深入的研究,得到以下主要成果：(1)對高速公路改擴建工程高邊坡施工自身特性及其對運營安全的影響進行了分析,辨識出其中存在的風險源,確定了高邊坡施工過程中運營安全的主要影響因素,并建立了高邊坡施工過程中運營安全危險性評價指標體系。(2)建立了基于T-S模糊神經(jīng)網(wǎng)絡的高速公路改擴建高邊坡施工過程中的運營安全危險性預測模型,并確立了危險性分級標準,以評估運營安全事故的危險性等級。(3)從承災體的易損性和價值兩個方面進行分析,建立了運營安全事故危害評價指標體系�；趯哟畏治龇ㄅc模糊數(shù)學理論,建立了運營安全事故危害模糊綜合評價模型,同時確定了危害等級劃分標準,并采用VB語言編制了運營安全事故危害評價軟件,初步實現(xiàn)了評估高邊坡施工過程中運營安全事故危害的智能化和快速化。(4)將運營安全風險劃分為五個等級,從運營安全危險性和事故危害兩個指標建立了高邊坡施工時運營安全風險綜合評價體系,并對風險進行了表征。(5)以柳南高速公路改擴建工程中的小平陽高邊坡進行實例研究,對采取不同施工和交通組織方案的情況作比較評價,根據(jù)評價結果判斷風險的大小與來源,并據(jù)此做出風險管理與控制的決策。結果驗證了本文評價方法的適用性和可靠性。
[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.
【學位授予單位】：長沙理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U418.8

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