沿江高速铁路上海至南通段线路方案研究

Study on Rout Scheme for River Shanghai-Nantong Section of High Speed Railway along Yangtze River

沿江高速铁路上海至南通段是国家"八纵八横"高速铁路主通道之沿江通道的组成部分。本段线路需穿越长江,穿江段为长江口黄金水道,船舶密集,水文情况及河势演变复杂。因此,线路走向和过江通道的选择是本段的重、难点。为了使线路方案在吸引客流、工程实施、经济效益等多方面做到综合最优,首先根据长江口港区、锚地、河势、水文、通航、地质、工程适应性等影响因素,分段论证了桥隧方式的选择,推荐采用对航运影响小、运营风险小的隧道过江方案。在确定过江方式之后,结合主要经济据点、枢纽引入条件和工程投资等因素,进行多方案技术比选,从而确定了上海至南通段线路走向方案。

The Shanghai-Nantong section of the high-speed railway along the Yangtze River is a part of the main channel of national “Eight Vertical and Eight Horizontal”high-speed railways. Haimen City, Qidong City and Chongming Island are located at east of the centerline of the route selected by aerial surveying alignment. The number of economic strongholds is proportional to the length and investment of the line. In addition, this section needs to cross the Yangtze River, which is the Golden Waterway of Yangtze River Estuary with dense vessels, complex hydrological conditions and river regime evolution. Therefore, line alignment and river-crossing channel selection are key points. To achieve comprehensive optimal line alignment from aspects of passenger attracting flow,engineer implementation and economic benefits, based on influencing factors of Yangtze Estuary port area, anchorage, river regime, hydrology, navigation, geology and engineering adaptability, selections of bridge and tunnel modes are thus demonstrated respectively, and tunnel scheme with less impact on navigation and less operation risk is recommended. After river crossing mode being determined, in combination with factors of the main economic strongholds, conditions of hub introduction and project investment, a multi-scheme technical comparison is made to determine the route scheme of Shanghai-Nantong section.