隧道导洞
It was shown that the surrounding rock of the tunnel constructed by double side-wall heading excavation method would unavoidably be damaged in a certain degree because of repeating blasting, especially the interlaid rock wall in tunnel groups with closely-spaced.
研究表明:推进式往复爆破作业的双侧壁导坑法开挖的隧道必然导致围岩产生一定程度的损伤、破坏,尤其是小净距隧道间的中夹岩岩墙。
He's heading towards the broad street tunnel.
他正朝宽街隧道驶去。
The double-shield and full-scale tunnel boring machine ( TBM) is one of the most advanced heading equipment for the construction of tunnel in the world.
TBM掘进机是目前世界上隧洞施工中最先进的掘进设备。
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