普通国道加宽改扩建技术研究

发布时间：2018-09-03 12:48

【摘要】：随着交通事业的不断发展,往往原有低等级的道路因为病害或者交通量要求,已经越来越不能满足道路交通的要求。为了更好的完善交通路线,需要对现行的道路进行改扩建,使其能满足现行交通要求。而现行的旧路改建问题涉及因素众多,最佳工程方案确定往往较为困难。普通国道改扩建项目不同于新建项目,受既有道路限制,需考虑对既有路线的拟合、新旧路基拼接、新旧桥梁拼接等因素的影响。因此,开展普通国道路基和桥梁拼接技术研究,对提高普通国道通行能力和综合服务水平,具有重要的理论和实际意义。本文围绕G223国道建设,通过实地考察、文献查阅、数值模拟等方法,分析普通国道新旧路基和桥梁拼接技术方案,主要内容如下:首先,通过实地调研客观分析G223国道建设发展过程中存在的制约因素,对国内外普通干线公路加宽改扩建技术发展趋势及普通干线公路改扩建方案的相关概念进行辨析,并对普通干线公路加宽改扩建技术研究现状进行综述,寻找普通干线公路加宽改扩建技术需要的各学科理论基础。其次,以海榆东线(国道G223)国道改扩建示范工程项目为依托,参考了G223国道和其他省道改扩建的成功经验,并通过有限元软件ANSYS、Midas-civil分别对路基和桥梁结构进行空间计算分析,着重对普通国道的改扩建方案、新旧路基拼接、新旧桥梁拼接等关键技术进行了研究。最后,在上述工作基础上,提出了我国普通国道改扩建方案的设计原则和方法,通过对普通国道改扩建工程特点的分析,总结出新旧路基拼接和新旧桥梁拼接的关键技术及相关处理方案。所做工作对普通国道路基和桥梁拼接技术方案的制定和优化具有一定的参考意义。
[Abstract]:With the continuous development of transportation, the original low-grade roads are often unable to meet the requirements of road traffic because of diseases or traffic volume requirements. In order to better improve the traffic routes, the existing roads need to be rebuilt and expanded to meet the current traffic requirements. It is difficult to determine the best project plan. The reconstruction and expansion project of the common national highway is different from the new project, which is restricted by the existing road. It is necessary to consider the influence of the fitting of the existing road, the splicing of the old and new roadbed, and the splicing of the old and new bridges. Ability and comprehensive service level are of great theoretical and practical significance. This paper focuses on the construction of G223 national highway, through field investigation, literature review, numerical simulation and other methods, analyzes the common national highway new and old roadbed and Bridge splicing technology scheme, the main contents are as follows: First, through field investigation and objective analysis of G223 national highway construction and development process exists. Restricting factors, this paper discriminates the development trend of general trunk highway widening and extension technology at home and abroad and the related concepts of general trunk highway widening and extension scheme, and summarizes the current research situation of general trunk highway widening and extension technology, in order to find the theoretical basis of various disciplines needed for general trunk highway widening and extension technology. Relying on the demonstration project of rebuilding and expanding the national highway of Haiyu East Railway (G223), referring to the successful experience of rebuilding and expanding the national highway of G223 and other provincial highways, and through the finite element software ANSYS and Midas-civil, the spatial calculation and analysis of the subgrade and bridge structure are carried out respectively, focusing on the rebuilding and expanding scheme of the common national highway, the splicing of new and old subgrade, the splicing of new and old bridges. Finally, on the basis of the above work, the design principles and methods of the renovation and expansion schemes of the common national highways in China are put forward. Through the analysis of the characteristics of the renovation and expansion projects of the common national highways, the key technologies and relevant treatment schemes of the new and old roadbed splicing and the new and old bridge splicing are summarized. The formulation and optimization of foundation and Bridge splicing technology plan has certain reference significance.
【学位授予单位】：湖北工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U418.8

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