undercrossing

1.The underground diaphragm wall in Yellow River Undercrossing Project of the Middle Route in the South-to-North Water Diversion is the deepest and thickest one in China.

南水北调线穿黄地下连续墙是国内最深最厚地下连续墙,地质条件差,施,施存在较风险。

2.Undercrossing tunnels are frequently constructed by the shield-driven method in metro projects.Shield tunneling affects the existing tunnel inevitably.

摘要在地铁，常采用盾构法修建正交下穿隧道，新隧道掘进不可避免地对既有隧道产生影响。