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今年元月二十日至三月十九日,我有机会参加中国铁路长大隧道设计与施工研修组赴日本考察隧道施工。在日考察期间,前后共参观了二十座隧道施工工点。其中有浅埋地下铁路隧道、浅埋新干线隧道、铁路山岭隧道、海底隧道、公路隧道;这些隧道有用爆破法开挖的硬岩,也有用机械切削法开挖的软岩、沙土;有断面很大的车站隧道及洞
From January 20 to March 19 this year, I had the opportunity to participate in the tunnel construction for the design and construction training group of China’s long railway tunnel to Japan. During the inspection tour in Japan, a total of 20 tunnel construction sites were visited. There are shallow underground railway tunnels, shallow buried Shinkansen tunnels, railway mountain tunnels, undersea tunnels and road tunnels; these tunnels are made of hard rock excavated by blasting method and soft rock and sand excavated by mechanical cutting method; Great station tunnels and holes