文章來源(yuan)：中國(guo)鐵路工程(cheng)總(zong)公司 發布時間：2010-06-01
5月20日，中(zhong)(zhong)國(guo)鐵路工(gong)(gong)程總公(gong)司中(zhong)(zhong)鐵九局(ju)(ju)施(shi)(shi)工(gong)(gong)的(de)伊(yi)爾施(shi)(shi)隧道(dao)全(quan)(quan)線(xian)貫通(tong)。伊(yi)爾施(shi)(shi)隧道(dao)為(wei)單(dan)線(xian)隧道(dao)，單(dan)洞(dong)凈空4.7×6.71米（寬×高(gao)），隧道(dao)全(quan)(quan)長1990米，是兩伊(yi)鐵路全(quan)(quan)線(xian)控制性工(gong)(gong)程，也是整個兩伊(yi)鐵路工(gong)(gong)程施(shi)(shi)工(gong)(gong)中(zhong)(zhong)條(tiao)件最艱苦的(de)區段(duan)，地質條(tiao)件復雜，圍(wei)巖變(bian)化大，分為(wei)Ⅲ、Ⅳ、Ⅴ級圍(wei)巖，支護形式多(duo)變(bian)，安全(quan)(quan)系數較低。中(zhong)(zhong)鐵九局(ju)(ju)圍(wei)繞工(gong)(gong)期、安全(quan)(quan)和質量目標，積(ji)極開展技術攻關(guan)，在施(shi)(shi)工(gong)(gong)中(zhong)(zhong)不(bu)斷總結經驗，不(bu)斷優化施(shi)(shi)工(gong)(gong)組(zu)織，科學(xue)排擺，進(jin)出(chu)口同時(shi)掘(jue)進(jin)，發(fa)揚連(lian)續(xu)作戰精神，按期確保了兩伊(yi)鐵路全(quan)(quan)線(xian)貫通(tong)。