Abstract: 所有超长距离隧道的建成都得益于隧道沿途各点的供应补给，但是分段供应补给不适用于海底隧道。对于运 输隧道、铁道或者高速公路等永久性工程，必须考虑工程中的人身安全、通风要求及供给限制等问题。这些限制性 问题可以通过另一领域的成熟技术来克服，即石油和天然气领域中所应用的近海构筑物技术。这类大型近海构筑 物一般建造于深海区，可以利用这些构筑物在隧道的建设过程中沿途提供补给，与此同时也加快了工程进度。结合 国际上、尤其是国内已有的案例，探讨了将近海构筑物运用于大型海底隧道的技术。

Key words: 海底, 隧道, 穿越

摘要： The construction of any very long tunnel is benefited by the provision of staging points along its route，but this is not usually possible for undersea tunnels． For transportation tunnels，for railways or highways，the life safety and ventilation requirements for the permanent works，as well as the construction logistics，need to be considered． These constraints can be overcomed by using proven technology from another field of engineering，the off-shore structures that have been employed in the oil and gas industry． These major off-shore structures can be located in deep waters，and can provide intermediate staging points for tunnel construction which also provides the benefit of accelerating the overall construction programme． The paper discusses how these structures can be employed for the benefit of major undersea crossings that have been identified around the world，and particularly in China．

关键词: undersea, tunnels, crossings