武汉轨道交通4号线越江区段方案研究

Research on the Scheme for Construction of Transriver Tunnel of Line 4 of Wuhan Urban Mass Transit

研究目的:武汉轨道交通4号线是武汉市轨道交通网络中的一条重要线路,通过越江隧道沟通武昌和汉阳,越江隧道工程施工风险大,影响因素多,对整个工程的进度起着控制作用,本文针对越江线路方案和环境特点,国内外类似工程的实践经验,进行技术经济条件比较和评价,拟通过研究分析选择一种技术先进、安全可靠、规模合理、能保证工程质量的越江隧道施工方案。研究结论:通过对4号线越江通道线路走向4种方案的研究分析和2种越江隧道施工方案的比较得知,越江通道线路走向应综合考虑线路线型、客流量、设站条件、沿线拆迁等因素的影响后择优选择。越江隧道施工方案应针对环境条件和类似工程的实践经验,进行技术经济条件的比选后确定。本工程经研究分析、比选后,线路走向推荐采用腰路堤方案,隧道施工推荐采用常规的单孔单线直径6.2 m的小断面盾构法施工,可有效降低工程实施难度,确保工程安全,减小工程总投资。

Research purposes： The Line 4 of Wuhan urban mass transit is an important hne oi Wuhan rail commumcation network and crosses the Yangtze River from Wuchang to Hanyang through tunnel, so the construction of transriver tunnel is very important to the entire project of the line 4, but there are lots of risks and influencing factors in construction. This paper analyzes the characteristics of the schemes and environment for construction of the transriver on the basis of the experiences in construction of similar tunnels at home and abroad for the purpose of seeking an advanced, reliable, safe, money - saving and high - quality scheme for construction of the tunnel. Research conclusions：Through making analyses and comparisons of four schemes for route selection of the transriver tunnel and two schemes for construction of the tunnel, the route selection of transriver tunnel should comprehensively considers the track type, passenger flow and the conditions of building stations and laying out track, and it is proposed to adopt the scheme of Yaoludi. For tunnel construction, it is proposed to adopt shield construction with small section of 6.2 m for single track and tunnel, which can effectively reduce the construction difficulties, guarantee the construction security and lower the construction cost.