沙子哨互通立交匝道工程的安全风险研究

发布时间：2018-12-10 13:26

【摘要】：经济的建设发展离不开便捷的交通,尤其是近些年,交通网络为整个社会的生产、流通和消费提供了有力的保障。高速公路作为陆地快速交通,是整个交通网络的重要组成部分。高速公路网络遍及大江南北,会遇到各种各样的情况,一些项目地形地势复杂,尤其是山区及丘陵地区,施工难度大大增加,致使施工中的安全风险增大。针对这一现状,本文以沙子哨互通D匝道工程为研究对象,本项目工程复杂,难度大,一旦出现安全风险事故,会造成严重的经济损失、社会不良影响,结合我国安全风险研究现状,对关键施工阶段进行了安全风险评估研究,为安全施工做好安全储备、奠定技术基础。论文首先系统的介绍安全风险评估的概念及理论框架,分析归纳不同的施工方案的安全风险发生的可能性、概率以及应对措施。然后结合沙子哨互通区现场实际情况,D匝道工程可以采用拆除惠兴高速K55+300处右侧既有特防高边坡方案(拆除重建高边坡方案)和采用小半径弯桥与加宽惠兴高速既有打告河桥结合方案(拼宽高桥+小半径高桥方案);接着论文对高边坡拆重建方案进行了总体风险评估及专项风险评估,确定总体风险等级为III级,属“高度风险”;对拼宽高桥+小半径高桥方案安全风险评估选用专家调查法进行研究,本方案存在“高度风险”(III级)风险源5个,“中度风险”(II级)风险源8个,“低度风险”(I级)风险源8个。最后根据两种方案及可能出现的不同风险事件,分别基于安全风险评估确定的风险等级,针对可能出现的风险事件提出相应的控制措施,特别是针对高度风险所提出的控制措施,降低了安全事故发生概率。综合“拆除高边坡方案”和“拼宽高桥+小半径高桥方案”风险等级以及现场实际地形和既有惠兴高速公路的保畅要求,一致认为“拼宽高桥+小半径高桥方案”为首选方案。本文的研究为山区新建高速公路与既有高速公路拼接施工安全评估提供了借鉴,对类似工程中应用安全风险评估具有一定的参考价值。
[Abstract]:The construction and development of economy can not be separated from convenient transportation, especially in recent years, the transportation network provides a powerful guarantee for the production, circulation and consumption of the whole society. Expressway is an important part of the whole transportation network as land express traffic. Expressway network is all over the north and south of the river and will encounter various situations. Some projects have complicated topography especially in mountainous and hilly areas and the construction difficulty is greatly increased resulting in the increase of safety risks in construction. In view of this situation, this article takes the sand whistle interworking D ramp project as the research object, this project is complex, the difficulty is big, once the safety risk accident appears, will cause the serious economic loss, the society bad influence, According to the present situation of safety risk research in China, the safety risk assessment is carried out in the key construction stage, which lays a technical foundation for the safety reserve of safety construction. Firstly, the paper systematically introduces the concept and theoretical framework of safety risk assessment, and analyzes the possibility, probability and countermeasures of safety risk of different construction schemes. And then combined with the actual situation in the site of the sand sentry interchange area, The D ramp project can be used to demolish the high side slope of the right side at K55300 of the Huexing Expressway (demolition and reconstruction of the high slope) and the combination of the small radius curved bridge and the widening of the Huixing expressway to hit the river bridge. Small radius tall bridge scheme); Then the paper carries on the overall risk assessment and the special risk assessment to the high slope demolition and reconstruction plan, determines the overall risk grade to be the III class, belongs to the "high risk"; An expert investigation method was used to study the safety risk assessment of small radius tall bridge with wide span bridge. There are 5 "high risk" (III) risk sources and 8 "medium risk" (II) risk sources in this scheme. "low risk" (class I) risk source 8. Finally, according to the two schemes and the different risk events that may occur, and based on the risk level determined by the security risk assessment, the corresponding control measures are put forward for the possible risk events. Especially, the control measures for high risk reduce the probability of safety accident. By synthesizing the risk grade of "demolishing high slope scheme" and "small radius high bridge scheme", as well as the actual terrain on the spot and the requirements of the existing Huixing Expressway, it is agreed that the "small radius high bridge project" is the first choice. The research in this paper provides a reference for the safety assessment of the construction of the new expressway and the existing expressway in mountain area, and has certain reference value for the application of the safety risk assessment in the similar projects.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U445.1;U415.12

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