Undercrossing tunnels are frequently constructed by the shield-driven method in metro projects.Shield tunneling affects the existing tunnel inevitably.
地铁工程中，常采用盾构法修建正交下穿隧
，新隧的掘进不可避免地对既有隧产生影响。
Undercrossing tunnels are frequently constructed by the shield-driven method in metro projects.Shield tunneling affects the existing tunnel inevitably.
地铁工程中，常采用盾构法修建正交下穿隧，新隧的掘进不可避免地对既有隧产生影响。
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