中小城市道路路网级配研究

发布时间：2018-03-30 14:04

本文选题：路网级配　切入点：河谷型城市　出处：《兰州交通大学》2015年硕士论文

【摘要】：近年来,我国城市交通问题愈发严重,随着城市规模与人口规模日益扩大,交通问题也逐渐蔓延至中小城市。完善、高效的城市交通建设是城镇化过程中必不可少的条件,而作为城市交通系统关键组成部分的城市路网,担负着城市各功能分区间交通流的汇集与疏散的重要作用,所以建立合理的路网结构是城市高效运转以及可持续发展的根本。目前国内针对占到中小城市数量中很大一部分比例的河谷型城市路网级配问题研究甚少,而许多城市规划学者在面临实地河谷型中小城市路网规划中城市道路干支比超出《城市道路交通设计规范》指标时无所是从,《规范》指标是否具有普遍适用性这一问题摆在了我们眼前。本文将道路的级配作为主线,分为三部分对这一问题展开研究。首先分析中小城市交通现状以及普遍存在的交通问题;对居民出行特征以及出行距离分布概率特征进行了阐述;通过对中小城市路网适应性的研究,提出了不同路网布局形式规划依据,基于此基础建立观点:对于中小城市交通路网问题研究,关键点就是确立科学合理的道路等级级配。第二部分建立并详细分析了中小城市道路网容量与交通需求模型,提出了改进型支持向量机(PSO-SVM)对于出行方式结构预测可行性,而后对现有数据进行分布曲线拟合;介绍并讨论了一般城市路网级配模型,提出此模型针对河谷型城市级配问题不足之处,而后分析河谷型城市城市空间特性及交通特性,以此为入手点建立基于出行分布距离的城市纵轴主干道交通分担模型以及基于道路不同出行顺序的交通组团内部路网交通分担级配模型,而后求出河谷型城市路网级配比例。最后以甘肃省定西市安定区为实例,利用上述两种模型,结合Matlab软件求解,得出定西市2020规划年城市道路路网级配两套方案,然后运用层次分析法,首先对级配中各评价因子进行了量化继而对两种方案进行合理性评价,对评价结果分析比较验证本文模型可行性。
[Abstract]:In recent years, the urban traffic problem has become more and more serious in our country. With the expansion of urban scale and population scale, the traffic problem has gradually spread to small and medium-sized cities. Perfect and efficient urban traffic construction is an indispensable condition in the process of urbanization. As a key component of urban traffic system, urban road network plays an important role in gathering and evacuation of traffic flow in different urban functions. Therefore, the establishment of a reasonable road network structure is the basis of efficient operation and sustainable development of the city. At present, there is little research on the problem of road network grading in river valley cities, which accounts for a large proportion of the number of small and medium-sized cities in China. However, many urban planners do not have anything to do when they are faced with urban road trunk / branch ratio exceeding the "Urban Road Traffic Design Code" in the field valley type urban road network planning, and whether or not the criterion has universal applicability. We have a problem in front of us. This paper takes the gradation of roads as the main line. It is divided into three parts to study this problem. Firstly, it analyzes the current traffic situation and the common traffic problems in small and medium-sized cities, and expounds the characteristics of residents' travel and the probability characteristics of travel distance distribution. Through the research on the adaptability of medium and small cities road network, the planning basis of different road network layout forms is put forward. Based on this basis, the following viewpoints are established: research on traffic network problems in medium and small cities, The key point is to establish a scientific and reasonable road grading. In the second part, the capacity and traffic demand model of road network in small and medium-sized cities is established and analyzed in detail, and the feasibility of prediction of trip mode structure by improved support vector machine (PSO-SVM) is put forward. Then the distribution curve fitting of the existing data is carried out, the general urban road network gradation model is introduced and discussed, and the shortage of this model is put forward to solve the problem of river valley city gradation, and then the spatial characteristics and traffic characteristics of river valley city are analyzed. Based on this point, the traffic sharing model of urban longitudinal axis main road based on travel distribution distance and the traffic sharing gradation model of road network within traffic groups based on different trip order are established. Finally, taking Anding District of Dingxi City, Gansu Province as an example, using the above two models and Matlab software to solve the problem, two sets of schemes for urban road network grading in 2020 planning year of Dingxi City are obtained. Then, by using the analytic hierarchy process (AHP), the evaluation factors in the gradation are quantified and then the rationality of the two schemes is evaluated, and the feasibility of the model is verified by the analysis and comparison of the evaluation results.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U412.12

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