成绵乐城际铁路对沿线城市可达性和经济联系强度影响分析
Analysis on the Influence of Chengdu Mianyang Leshan Intercity Railway on the Accessibility and Economic Connection Strength of Cities along the Line

成绵乐城际铁路是西南地区首条城际铁路，在成渝城市群交通体系中有着举足轻重的地位，成绵乐城际铁路的开通在区域联动和空间重组方面对成渝城市群产生深刻影响。本文选取可达性模型和引力模型分别测量成绵乐城际铁路开通前后沿线城市的可达性变化和城市之间的经济联系强度，分析沿线城市的城际铁路效应，从而对成绵乐城际铁路开通前后的区域经济格局进行深入探究。研究结果表明：成绵乐城际铁路开通后，沿线城市之间的可达性水平得到了大幅度的提升；成绵乐城际铁路也加大了沿线城市间的经济联系强度，成都作为区域的核心地位愈发突出，区域经济明显呈现处“单中心”的趋势；成绵乐城际铁路对于开通前的老牌资源、经济强市——成都，促进作用非常明显。
Chengdu Mianyang Leshan intercity railway is the first intercity railway in Southwest China, which plays an important role in the transportation system of Chengdu Chongqing urban agglomeration. The opening of Chengdu Mianyang Leshan intercity railway has a profound impact on Chengdu Chongqing urban agglomeration in terms of regional linkage and spatial reorganization. In this paper, the accessibility model and the gravity model are selected to measure the accessibility changes of cities along the Chengdu Mianyang Leshan intercity railway before and after its opening and the strength of economic ties between cities, and analyze the intercity railway effect of cities along the railway, so as to further explore the regional economic pattern before and after the opening of the Chengdu Mianyang Leshan intercity railway. The results show that: after the Chengdu Mianyang Leshan intercity railway is opened, the accessibility level of the cities along the line has been greatly improved; the Chengdu Mianyang Leshan intercity railway has also increased the strength of economic ties between the cities along the line; Chengdu as the core position of the region has become increasingly prominent, and the regional economy obviously shows the trend of “single center”; the Chengdu Mianyang Leshan intercity railway for the old brand resources before the opening Chengdu, a city with strong economy, plays a very significant role in promoting de-velopment.