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近20年来,世界各国一直为大型水利水电工程的造价增长和工期加长而感到焦虑。许多能够提供电力和灌溉水源的坝址,往往因工程造价太高和工期过长而无法开发利用。为了摆脱这种困境,寻找新的途径,各国的坝工工程师们近年来作出了巨大努力。美国陆军工程师团在进行大量调查研究之后,认为采用碾压混凝土筑坝和使用隧洞掘进机建造高压输水道两项
In the past 20 years, all countries in the world have been anxious about the cost increase and the longer construction period of large-scale water conservancy and hydropower projects. Many dam sites that provide electricity and irrigation water are often under-utilized due to high project costs and long construction periods. In order to get out of this predicament and find new ways, dam engineers in various countries have made great efforts in recent years. After conducting a large number of investigations and studies, the Army Corps of Engineers believes that the use of RCC dam construction and the use of tunnel boring machines to build two high-pressure waterways