文章來源(yuan)：中國石油(you)天然氣集團公(gong)司 發(fa)布(bu)時間：2010-06-05
6月4日12時40分，位于甘肅省安西極旱荒漠自然保護區的西氣東輸二線西段工程第七標段，伴隨著最后一道焊口完成，這項舉世矚目的工程的西段管線主體焊接完工。
西(xi)氣東(dong)輸二線工(gong)(gong)(gong)(gong)程(cheng)(cheng)作為(wei)我國(guo)首條引進境外天(tian)然(ran)氣資源(yuan)的大(da)(da)(da)型管(guan)道工(gong)(gong)(gong)(gong)程(cheng)(cheng)，被列入國(guo)家“十(shi)一(yi)五”規劃建設重大(da)(da)(da)項目(mu)。自去年2月22日工(gong)(gong)(gong)(gong)程(cheng)(cheng)開(kai)工(gong)(gong)(gong)(gong)以(yi)來，中國(guo)石(shi)油廣大(da)(da)(da)石(shi)油工(gong)(gong)(gong)(gong)程(cheng)(cheng)建設者(zhe)(zhe)攻堅克(ke)難，僅用15個多月時(shi)間，就(jiu)高(gao)水(shui)平完成西(xi)氣東(dong)輸二線西(xi)段管(guan)線主體焊接任務。管(guan)線經過(guo)沙漠、戈壁(bi)、黃土(tu)沖溝、山地等多種(zhong)復雜地貌(mao)，交(jiao)通(tong)運輸、施(shi)工(gong)(gong)(gong)(gong)作業條件艱(jian)苦，給安全和環(huan)境保護工(gong)(gong)(gong)(gong)作帶來嚴峻挑戰。管(guan)線途(tu)經地區干旱少(shao)雨，風沙大(da)(da)(da)，日照(zhao)強(qiang)、空氣干燥。部分(fen)地區冬季寒冷多雪，管(guan)線施(shi)工(gong)(gong)(gong)(gong)受到較大(da)(da)(da)影(ying)響。另外，建設者(zhe)(zhe)還(huan)克(ke)服地方協(xie)調任務繁重、控制性工(gong)(gong)(gong)(gong)程(cheng)(cheng)難度巨大(da)(da)(da)等困(kun)難，創(chuang)造出一(yi)系列亮(liang)點。
X80/Φ1219鋼管(guan)的(de)輸送壓力、管(guan)徑、壁厚等綜(zong)合(he)參數在國際(ji)上尚屬首次(ci)(ci)。西(xi)段管(guan)道(dao)22.4萬(wan)道(dao)焊口，焊接一(yi)次(ci)(ci)合(he)格率(lv)達98.73%，單機組全自動焊最高功效達每天130道(dao)口，達到(dao)世(shi)界(jie)管(guan)道(dao)建設先進水平。為節約(yue)用地(di)，縮(suo)減作業帶寬度，西(xi)氣東輸二線建成(cheng)后(hou)，若將(jiang)節約(yue)的(de)土地(di)折成(cheng)1米寬的(de)綠地(di)，繞地(di)球赤道(dao)一(yi)周還(huan)多出(chu)2000多公里。
特別是今年2月27日(ri)，西氣東輸二線西段的最大(da)控(kong)制性工程果子溝一號隧道(dao)(dao)勝利貫(guan)通(tong)，隧道(dao)(dao)群7條隧道(dao)(dao)全(quan)部建成，創(chuang)下中國(guo)工程和(he)管道(dao)(dao)隧道(dao)(dao)建設史上多項紀錄：3公里長的一號隧道(dao)(dao)，中線貫(guan)通(tong)偏差(cha)不(bu)足(zu)3厘米；按掘進實際天數(shu)計算，平均日(ri)進尺7米，創(chuang)日(ri)優質掘進14.5米的紀錄。
西(xi)(xi)氣(qi)東(dong)輸二線(xian)(xian)是(shi)連(lian)接中(zhong)亞(ya)進口氣(qi)源(yuan)和國內塔里(li)木(mu)氣(qi)田、準噶(ga)爾氣(qi)田、吐(tu)哈(ha)氣(qi)田、長(chang)慶氣(qi)田，與沿線(xian)(xian)中(zhong)西(xi)(xi)部地區、華東(dong)、華南、長(chang)江和珠(zhu)江三角洲(zhou)等(deng)用氣(qi)市場的(de)重要(yao)戰略通(tong)道(dao)，干線(xian)(xian)、支線(xian)(xian)總里(li)程達到(dao)8600多公里(li)。由于工(gong)程規模大、工(gong)期要(yao)求緊，西(xi)(xi)氣(qi)東(dong)輸二線(xian)(xian)的(de)建(jian)(jian)設按照“先西(xi)(xi)段(duan)(duan)(duan)后東(dong)段(duan)(duan)(duan)、先干線(xian)(xian)后支線(xian)(xian)”的(de)總體思路(lu)，以(yi)寧(ning)夏中(zhong)衛(wei)為界分為東(dong)西(xi)(xi)兩段(duan)(duan)(duan)組(zu)織工(gong)程建(jian)(jian)設。西(xi)(xi)段(duan)(duan)(duan)干線(xian)(xian)霍爾果(guo)斯—中(zhong)衛(wei)段(duan)(duan)(duan)，長(chang)2410公里(li)；東(dong)段(duan)(duan)(duan)干線(xian)(xian)中(zhong)衛(wei)—廣東(dong)、香(xiang)港段(duan)(duan)(duan)，長(chang)2477公里(li)。
西(xi)氣(qi)東輸二線建成投(tou)產(chan)，對于提高(gao)(gao)清(qing)潔(jie)能(neng)源比(bi)重，優化(hua)能(neng)源消費(fei)結構(gou)；緩解天(tian)然(ran)(ran)氣(qi)供應(ying)(ying)緊張局面，增(zeng)強(qiang)天(tian)然(ran)(ran)氣(qi)供應(ying)(ying)保障能(neng)力；推進全國天(tian)然(ran)(ran)氣(qi)骨干管(guan)網建設，提高(gao)(gao)管(guan)網運營水平；推動我(wo)國物資(zi)裝備工業自主創新和國產(chan)化(hua)等(deng)具有積極意義。