文章來源：中國鐵(tie)路工程總公司 發(fa)布時間：2010-05-27
5月20日，中(zhong)(zhong)國鐵路(lu)工(gong)(gong)程總公司中(zhong)(zhong)鐵隧(sui)道(dao)(dao)施工(gong)(gong)的(de)永武(wu)高速公路(lu)A8標控(kong)制性(xing)工(gong)(gong)程橫山隧(sui)道(dao)(dao)右線(xian)勝(sheng)利貫通(tong)。橫山隧(sui)道(dao)(dao)全(quan)長2940米(mi)，地(di)(di)質條(tiao)(tiao)(tiao)件(jian)(jian)差，以(yi)Ⅳ、Ⅴ級圍巖為主，圍巖節理裂隙發育，穩(wen)定(ding)性(xing)差，隧(sui)道(dao)(dao)穿過7條(tiao)(tiao)(tiao)斷層(ceng)(ceng)，施工(gong)(gong)難度(du)極(ji)大。施工(gong)(gong)中(zhong)(zhong)遭遇(yu)了(le)千枚(mei)巖、千枚(mei)狀粉砂巖、印(yin)支期侵入花崗巖、斷層(ceng)(ceng)等(deng)多(duo)種(zhong)不(bu)良地(di)(di)質，是永武(wu)高速公路(lu)地(di)(di)質條(tiao)(tiao)(tiao)件(jian)(jian)最(zui)復雜、施工(gong)(gong)風險最(zui)高的(de)隧(sui)道(dao)(dao)之一。自開(kai)工(gong)(gong)以(yi)來(lai)，中(zhong)(zhong)鐵隧(sui)道(dao)(dao)精(jing)心策劃、科學組織，規范施工(gong)(gong)，有效控(kong)制作業循環(huan)時間，超(chao)前預測地(di)(di)質情況，參建員(yuan)工(gong)(gong)齊心協力(li)，采(cai)用短進(jin)尺、弱爆破(po)，穩(wen)扎穩(wen)打的(de)方式，不(bu)畏艱險、奮(fen)力(li)拼搏，多(duo)次(ci)戰勝(sheng)涌水，順利通(tong)過7條(tiao)(tiao)(tiao)斷層(ceng)(ceng)，取得了(le)在(zai)極(ji)其復雜的(de)地(di)(di)質條(tiao)(tiao)(tiao)件(jian)(jian)下，隧(sui)道(dao)(dao)開(kai)挖無坍塌(ta)、無安(an)全(quan)事故(gu)的(de)好(hao)成(cheng)績(ji)。