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万家寨引黄工程的总干线的６ 、７ 、８ 号隧洞全长２１ ｋｍ ， 由意大利的 Ｃ Ｍ Ｃ Ｓ Ｅ Ｌｌ 集团公司中标承建， 在施工中使用了目前世界上最先进的隧洞施工机械———双护盾全断面隧道掘进机（ 简称 Ｔ Ｂ Ｍ） 。 Ｔ Ｂ Ｍ 适用于中等强度的岩石， 其施工特点是速度快， 边掘进边衬砌， 一次完成。在总干线施工中创造了日最高进尺６５６ ｍ ， 月最高进尺１ ０８０６ ｍ 的好成绩。南干线全长８８ ｋｍ 的隧洞也将采用 Ｔ Ｂ Ｍ 进行施工。 Ｔ Ｂ Ｍ 将会在我国长距离输水工程中得到广泛地应用。
The 6th, 7th and 8th tunnels of the main trunk line of Wanjiazhai Yellow River Diversion Project are 21km in total length and are constructed by winning the bid of C M C-S E Ll Group of Italy. At present, the most advanced tunnel construction in the world is used Machinery --- double-shield full-face tunnel boring machine (referred to as T B M). T B M is suitable for rock with moderate strength and its construction is characterized by high speed and boring and boring at one time. In the construction of the main trunk line, the maximum daily footage of 65.6 m was obtained, and the monthly maximum footage was 1,080.6 m. The tunnel on the southern trunk line with a total length of 88 km will also be constructed with TBM. T B M will be widely used in long-distance water transfer projects in our country.