大连湾海底隧道南岸接线立交方案设计

Scheme Design of Connection Interchange on South Bank of Dalian Bay Subsea Tunnel

大连湾海底隧道是大连市核心区连接大连湾南北两岸的快速通道,也是核心区出入市区的快速通道。其南岸接线立交是实现新建快速路与中山区老城区路网交通转换的枢纽,未来又要承担与疏港路延伸线(快速路)的交通转换功能。对项目的功能定位、南岸的规划条件、交通需求以及周边的建设条件等进行综合分析,在交通组织设计的基础上,介绍了推荐的立交总体方案。方案考虑近远期的结合:近期提出“两级分岔、三向分流”的交通组织策略,推荐三点集散变异Y型地下立交与周边路网衔接;远期结合疏港路延伸工程,增设双子叶型地上立交,实现两条快速路之间的互通。

Dalian Bay Subsea Tunnel is the expressway to connect the south and the north bank of the bay in the core area of Dalian, and is also an expressway into and outside of the core area. The connection interchange on its south bank is the hub to realize the traffic transformation of the newly built expressway and the road network in the old urban area of Zhongshan District, and will undertake the traffic transformation function of the extension line (expressway) of Shugang Road in the future. This paper comprehensively analyzes the functional orientation of the project, the planning condition of the south bank, the traffic demand and the surrounding construction conditions. On the basis of traffic organization design, this paper introduces the recommended overall scheme of interchange. Based on the combination of the short term and the long term in the scheme, the traffic organizational strategy of "two-stage turnoff, three-way separation" is proposed in the short term, and the three-point collecting and distributing deformed Y-shaped underground interchange is recommended to connect the surrounding road network. Combined with Shugang Road Extension Project, the dicotyledon-shaped ground interchange will be added in the long term to realize the interchange between two expressways.