桥梁-道路建设对西南山地城市扩展影响机制研究——以重庆嘉陵江两桥为例

发布时间：2018-01-31 16:43

本文关键词： 山地城市桥梁-道路城市扩展重庆市　出处：《长江流域资源与环境》2017年01期 　论文类型：期刊论文

【摘要】：交通因素对城市空间扩展的影响是一个研究热点,但国内外关于桥梁-道路建设对山地城市扩展影响机制的研究还不多见。基于桥梁-道路对城市待开发区域区位的影响,提出了点状辐射、线状辐射和环状辐射3种影响机制。以重庆嘉陵江大桥和黄花园大桥建设对嘉陵江北岸影响为例,将研究区划分为5个分区,基于Arc GIS软件提取各分区城市建成区与河岸的空间分布关系,并通过5个分区1940~2009年城市扩展差异比较印证3种影响机制。研究结果表明,桥梁和道路建设促进研究区建成区迅速扩张,但对不同分区的建成区扩展速度的影响有差异;第3分区城市扩展反映了桥梁-道路对城市扩展的点状辐射和线状辐射,而第4分区城市扩展反映了桥梁-道路对城市扩展的环状辐射。结论表明研究提出的点状辐射、线状辐射和环状辐射符合桥梁-道路建设对西南山地城市扩展的影响机制。
[Abstract]:The influence of traffic factors on urban spatial expansion is a hot topic. However, there are few studies on the influence mechanism of bridge-road construction on the expansion of mountainous cities at home and abroad. Based on the influence of bridge-road on the location of urban areas to be developed, the point-like radiation is put forward. Taking the influence of the construction of the Jialing River Bridge and the Huangyuan Bridge in Chongqing on the north bank of the Jialing River as an example, the study area is divided into five zones. Based on Arc GIS software, the spatial distribution relationship between urban built-up area and riverbank is extracted. Through the comparison of urban expansion differences in five districts from 1940 to 2009, the results showed that the bridge and road construction promoted the rapid expansion of the constructed areas in the study area. However, the effect on the expansion speed of different districts is different. The third district urban expansion reflects the point-like radiation and linear radiation from the bridge and road to the urban expansion. The fourth district urban expansion reflects the ring-like radiation from the bridge and road to the urban expansion. The conclusion shows that the point radiation proposed by the study. Linear radiation and annular radiation are consistent with the influence mechanism of bridge-road construction on the expansion of mountainous cities in southwest China.
【作者单位】：北京大学城市与环境学院;重庆市国土资源和房屋勘测规划院;
【基金】：中国博士后基金项目(2015M582526) 重庆市国土房管局科技项目(KJ-2015004) 国家自然科学基金项目(413713514)~~
【分类号】：TU984;F542.8
【正文快照】： 全球城镇化快速发展背景下,城市扩展研究是一个热门话题。目前的研究有城市扩展理论、城市规划设计、城市扩展边界等。其中,交通网络对城市扩展具有重要影响[1],两者关系研究是个热门方向。国外学者Duranton研究美国主要城市1980~2000年公路和公共交通影响发现,城市道路增长10

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