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１工程概况山西省万家寨引黄工程总干线＃６、＃７、＃８隧洞位于山西省西北部的偏关县，总干线共有１１条输水隧洞，长约４２km，其中＃６隧洞长６．５３km，＃７隧洞长２．６９km，＃８隧洞长１２．１８km．＃６、＃７、＃８隧洞均为无压洞，设计流量４８m３／s，圆形断面内
1 Project Overview Shanxi Wanjiazhai Yellow River Diversion Project Main Route # 6, # 7, # 8 tunnel is located in the county of northwest Shanxi Province, the total closure of the main Route 11 water diversion tunnel, about 42km, of which # 6 tunnel length 6.53km, # 7 The tunnel is 2.69km long and # 8 is 12.18km long. # 6, # 7, # 8 tunnel are non-pressured hole, the design flow of 48m3 / s, within the circular section