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 　　中國鐵路工(gong)程總公司所(suo)屬(shu)的中鐵一(yi)局在青藏鐵路十四標段開心嶺１號特大橋施(shi)工(gong)中，攻克了(le)“高原凍土(tu)、高原環保、高原生理”三大難題。

　　開(kai)心嶺(ling)１號特(te)大(da)橋全(quan)長637米(mi)，2臺(tai)18墩，大(da)橋為半徑800米(mi)的曲(qu)線特(te)大(da)橋，位于海拔4780米(mi)的青藏高(gao)原開(kai)心嶺(ling)凍(dong)土、熱融(rong)塘(tang)濕地段，大(da)橋跨越被(bei)喻為“天路(lu)”的青藏公路(lu)（109國道）和長江源頭的諾日巴根曲(qu)河，“三高(gao)”施工難(nan)題在(zai)特(te)大(da)橋施工中全(quan)部顯現。  

　　中(zhong)鐵一局面(mian)對高(gao)(gao)原環(huan)(huan)保施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)難題(ti)，首先制(zhi)定(ding)了(le)(le)環(huan)(huan)保施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)制(zhi)度，從進場便道到(dao)墩(dun)臺(tai)位(wei)置，拉設綠網、三(san)角小(xiao)彩旗、立警示牌，以(yi)保護上(shang)(shang)百(bai)年(nian)生(sheng)長不(bu)(bu)到(dao)一寸高(gao)(gao)的(de)(de)綠地和野(ye)生(sheng)動植物。為了(le)(le)不(bu)(bu)破(po)壞(huai)凍土(tu)，在(zai)(zai)下部基(ji)礎施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)中(zhong)，采用(yong)價值近千萬元(yuan)的(de)(de)德國進口先進設備寶峨(e)25型(xing)旋挖鉆及(ji)“干(gan)拔出凍土(tu)”施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)(gong)藝(yi)，經過幾(ji)個月的(de)(de)艱(jian)苦奮(fen)戰，全橋(qiao)(qiao)77根20米左右的(de)(de)樁基(ji)在(zai)(zai)凍土(tu)濕(shi)地地段全部澆灌成功，合格率(lv)100％。在(zai)(zai)大(da)(da)橋(qiao)(qiao)上(shang)(shang)部施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)中(zhong)，面(mian)對青藏高(gao)(gao)原“一日四(si)季，百(bai)步不(bu)(bu)同天”的(de)(de)惡劣環(huan)(huan)境，狂風(feng)暴雪、強(qiang)紫外(wai)線和高(gao)(gao)寒缺(que)氧是施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)的(de)(de)最大(da)(da)干(gan)擾。在(zai)(zai)高(gao)(gao)原承(cheng)臺(tai)、墩(dun)身施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)中(zhong)，項(xiang)(xiang)目部采用(yong)了(le)(le)搭設保溫工(gong)(gong)(gong)(gong)(gong)棚和滲水(shui)麻布、塑料(liao)布、帆(fan)布三(san)層圓墩(dun)臺(tai)養生(sheng)法，確保了(le)(le)工(gong)(gong)(gong)(gong)(gong)程質(zhi)量(liang)。為了(le)(le)加(jia)(jia)(jia)快施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)進度，項(xiang)(xiang)目部增加(jia)(jia)(jia)了(le)(le)兩(liang)臺(tai)吊車、兩(liang)臺(tai)罐車，加(jia)(jia)(jia)工(gong)(gong)(gong)(gong)(gong)了(le)(le)兩(liang)套墩(dun)身模型(xing)，并在(zai)(zai)兩(liang)個大(da)(da)橋(qiao)(qiao)項(xiang)(xiang)目隊之間開展(zhan)勞動競賽，晝(zhou)夜施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)，確保了(le)(le)大(da)(da)橋(qiao)(qiao)的(de)(de)施(shi)(shi)(shi)工(gong)(gong)(gong)(gong)(gong)進度。

　　目前，中鐵一局在開心嶺１號特大橋(qiao)施工中已(yi)澆(jiao)灌墩身8個、橋(qiao)臺2個，預計7月底特大橋(qiao)將全部完工。