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全世界每年有60多万km的小直径隧道要施工,主要是上下水管网和各种电缆的铺设。国际不明挖施工技术协会(ISTT)已多次召开了国际技术交流会。采用小隧道施工技术,由于不挖明沟,综合效益好。1989年4月,在慕尼黑博览会期间召开的第四次小型隧道施工技术交流会上,展出了日本、美国、西德、英国、加拿大和澳大利亚等国几十个公司的有关小型隧道开挖、监视、铺管和衬管的新技术和新设备。现在作一简单地介绍。
There are more than 600,000 km of small-diameter tunnels to be constructed every year around the world, mainly the laying of upper and lower water pipe networks and various cables. The International Association for Unknown Construction Technology (ISTT) has held several international technical exchanges. The use of small tunnel construction technology, due to not dug trenches, the overall efficiency is good. In April 1989, at the fourth small-tunnel construction technology exchange conference held during the Munich Expo, several excavation projects involving small tunnels in Japan, the United States, West Germany, the United Kingdom, Canada, and Australia were displayed. New technologies and equipment for monitoring, pipelaying and liners. Now make a brief introduction.