连拱隧道断面型式选型及中墙构型优劣研究

通过对目前在建和已建的连拱隧道的调查和总结,支护结构受力的复杂性和中墙开裂、渗漏水是连拱隧道设计、施工和运营中的突出问题。因此,对连拱隧道断面型式选型及中墙构型进行了分析、研究,得出连拱隧道断面型式在不同情况时的合理选用,同时得出分层式曲中墙是最优的中墙型式,并对其在施工中稳定性相对不足进行了进一步优化,使其能更好地应用到实际工程中去。

Research on Selection of Section Type of Multiple - Arch Tunnel and on Excellent or Inferior Configuration of Medium Wall

In terms of investigation and summarization of multiple - arch tunnels under building and built completely at present,it is known that the complexity of support structure bearing as well as the crack and seepage of medium wall are conspicuous problems in design,construction and running of multiple - arch tunnel. Therefore, the paper studies the section type of multiple- arch tunnel and the configuration of medium wall,then come to the conclusion that the reasonable selection of seeion type of multiple - arch tunnel in different state should be made and that the laminated curved medium wall is an optimum one. Moreover,the less stable eostruction of this medium wall has been further optimized to bring about it better to be applied in practical project.