六广河特大桥施工风险管理研究

发布时间：2019-05-13 23:42

【摘要】：息烽至黔西高速公路是贵州省“678”高速公路网中“三横”的重要组成部分,六广河特大桥是息黔高速公路全线跨径最大、施工技术要求高和施工难度最大的一座控制性桥梁,其施工过程中不确定因素多,施工风险高,一旦发生事故,将造成不可挽回的损失,因此对六广河特大桥施工过程中的风险管理,确定施工风险因素,并针对这些因素提出因对措施,对施工过程中可能发生的风险提前应对,显得尤为重要。本文按照六广河特大桥的施工工艺顺序,利用专家调查法和现场调查法,提出各个施工工序的风险因素,之后将这些风险因素整合,最终确定六广河特大桥的施工风险因素。再利用模糊层次分析法确定六广河特大桥施工过程中风险因素的权重,模糊层次分析法的目标层为六广河特大桥施工风险,中间层为桩基施工、承台施工、塔柱施工、横梁施工、钢梁施工及斜拉索施工六个方面。确定风险因素权重后,利用专家调查表法,确定指标层风险因素发生概率及损失量的权重,进而确定各工序的风险度,建立风险概率模型与风险损失模型,根据风险评价矩阵,计算出风险概率和风险损失的等级,确定六广河特大桥施工过程的风险等级。最后提出风险因素的应对措施,保证六广河特大桥施工的顺利进行。本文利用实际工程案例,将模糊层次分析法应用于大跨径斜拉桥施工的风险管理过程中,提出了施工过程中的风险因素及其应对措施,具有一定的现实意义,可供同行参考。
[Abstract]:Xifeng to Qianxi Expressway is an important part of "three horizontal" in the "678" expressway network of Guizhou Province. Liuguang River Bridge is a controlled bridge with the largest span, high construction technical requirements and the most difficult construction. There are many uncertain factors and high construction risk in the construction process, once the accident occurs, it will cause irreparable losses. Therefore, the construction risk factors are determined for the risk management in the construction process of Liuguang River Bridge. In view of these factors, it is particularly important to put forward measures to deal with the risks that may occur in the construction process in advance. According to the construction technology sequence of Liuguanhe Bridge, this paper puts forward the risk factors of each construction process by using expert investigation method and field investigation method, and then integrates these risk factors to finally determine the construction risk factors of Liuguanhe Bridge. Then the weight of risk factors in the construction process of Liuguanhe Bridge is determined by fuzzy analytic hierarchy process. The target layer of fuzzy AHP is the construction risk of Liuguanhe Bridge, and the middle layer is pile foundation construction, cap construction and tower column construction. Cross beam construction, steel beam construction and cable-stayed cable construction six aspects. After determining the weight of risk factors, the risk factors occurrence probability and loss weight of index layer are determined by using expert investigation table method, and then the risk degree of each process is determined, and the risk probability model and risk loss model are established, according to the risk evaluation matrix, The risk probability and the grade of risk loss are calculated, and the risk grade of Liuguang River Bridge is determined. Finally, the countermeasures of risk factors are put forward to ensure the smooth construction of Liuguang River Bridge. In this paper, the fuzzy analytic hierarchy process (AHP) is applied to the risk management process of long-span cable-stayed bridge construction by using the actual engineering case, and the risk factors and their countermeasures in the construction process are put forward, which has certain practical significance and can be used as a reference for the colleagues.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U445.1

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