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近二十年发展起来的新奥法是隧道设计、施工上的革新。新奥法已经应用到几乎所有地层,并带动了岩石力学及支护、量测等新技术的发展。各国都在采用这项新技术,降低造价,改善环境,加快速度。国外十九世纪的3座双线长隧道年平均进度1.7km,二十世纪修建的12座双线长隧道年平均进度2.84km,11座单线隧道年平均进度3.5km。
The new Austrian law that has developed in the past 20 years is an innovation in tunnel design and construction. The new Austrian law has been applied to almost all strata, and led to the rock mechanics and support, measurement and other new technologies. All countries are using this new technology to reduce costs, improve the environment and speed up. The average length of three double long tunnels in foreign countries in the nineteenth century was 1.7km. The average annual progress of 12 double long tunnels constructed in the twentieth century was 2.84km. The average annual progress of 11 single tunnels was 3.5km.