Some key issues related with excavation by a super-large shield machine and the design and construction of immersed tunnel in deep seawater and torrent conditions are also listed.
最后，对超大型盾构机长距离掘进与深水急流海底沉管隧道的设计、施工等列出其中的若干技术关键问题。
As one of the crucial procedures of shield boring, the arriving of shield machines with super-large diameters is complicated in technology and has great risks.
超大盾构的到达施工作为盾构施工的重要环节，工艺复杂，风险巨大。
As one of the crucial procedures of shield boring, the arriving of shield machines with super-large diameters is complicated in technology and has great risks.
超大盾构的到达施工作为盾构施工的重要环节，工艺复杂，风险巨大。
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