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The China construction reported: a big break building steel structure construction technology in guangxi

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    這是廣西建工(gong)一(yi)建成(cheng)立(li)以來的(de)(de)一(yi)次(ci)歷史(shi)突破,一(yi)舉填補了多(duo)(duo)年來在鋼(gang)(gang)結構(gou)施工(gong)領域的(de)(de)技術空白。這座(zuo)總跨(kua)度(du)高達(da)124米、覆蓋(gai)面積達(da)9500平方米的(de)(de)綜合體育館鋼(gang)(gang)結構(gou)屋架,凝聚了貴港體育中(zhong)心項目部的(de)(de)智(zhi)慧和汗水,歷時180多(duo)(duo)天,以高質(zhi)量(liang)、高標準完成(cheng)了這次(ci)超(chao)(chao)高難度(du)的(de)(de)屋頂高空吊裝任務,其QC課題(ti)《確保百米超(chao)(chao)大跨(kua)度(du)鋼(gang)(gang)結構(gou)屋架高空安裝質(zhi)量(liang)》榮獲(huo)2015年廣西區工(gong)程建設(she)優秀QC小組(zu)一(yi)等獎。

全員發動,群策群力

    綜合(he)體育館(guan)項目鋼(gang)(gang)結(jie)構(gou)(gou)屋(wu)面(mian)(mian)作(zuo)為(wei)廣西一(yi)建有史(shi)以來承建的最大(da)鋼(gang)(gang)結(jie)構(gou)(gou)工(gong)程,其網殼屋(wu)蓋總(zong)跨度124米(mi),由徑向36榀(pin)平面(mian)(mian)主桁(heng)架(jia),環向16榀(pin)平面(mian)(mian)次桁(heng)架(jia)、桁(heng)架(jia)間支撐(cheng)及系桿和支座間桁(heng)架(jia)組(zu)(zu)成,工(gong)程技術十分復(fu)雜(za),一(yi)時間項目部陷(xian)入經驗(yan)缺乏的困境。項目經理(li)黃杰輝臨危受(shou)命,組(zu)(zu)建了攻關型(xing)QC小(xiao)(xiao)組(zu)(zu),展(zhan)開了一(yi)場歷時180多天的技術攻堅戰。“QC是團體協作(zuo),只有發動全(quan)體員工(gong)共同參與,才能更快更好地找到解決問題的辦(ban)法(fa)。”為(wei)制定縝密、科學(xue)的施(shi)(shi)工(gong)方案(an),確保屋(wu)面(mian)(mian)一(yi)次性成功安(an)裝(zhuang)(zhuang),從2014年6月起,QC小(xiao)(xiao)組(zu)(zu)就開始集(ji)思廣益、群(qun)策群(qun)力,在項目部刮起了一(yi)場“頭腦風暴”。結(jie)合(he)以往大(da)型(xing)工(gong)程的施(shi)(shi)工(gong)經驗(yan),QC小(xiao)(xiao)組(zu)(zu)檢索、整理(li)了大(da)量鋼(gang)(gang)結(jie)構(gou)(gou)施(shi)(shi)工(gong)檔案(an),根據本工(gong)程屋(wu)架(jia)鋼(gang)(gang)結(jie)構(gou)(gou)施(shi)(shi)工(gong)特點進(jin)行對(dui)照(zhao)分析,歸(gui)納出(chu)影響鋼(gang)(gang)結(jie)構(gou)(gou)桁(heng)架(jia)施(shi)(shi)工(gong)質量的主要因素(su)在于鋼(gang)(gang)桁(heng)架(jia)施(shi)(shi)工(gong)“安(an)裝(zhuang)(zhuang)偏差”。為(wei)降低安(an)裝(zhuang)(zhuang)偏差、提升桁(heng)架(jia)施(shi)(shi)工(gong)質量合(he)格率,QC小(xiao)(xiao)組(zu)(zu)連(lian)夜加(jia)班,研究對(dui)策,在確保萬(wan)無一(yi)失的情況下(xia),拉開吊裝(zhuang)(zhuang)施(shi)(shi)工(gong)的帷幕。

爭分奪秒,突破難關

    因貴港體(ti)育中心項(xiang)(xiang)目(mu)的(de)合同類型為(wei)BT項(xiang)(xiang)目(mu),集團一、二、五(wu)公司負責各(ge)場(chang)館建設,受到(dao)合同外可調項(xiang)(xiang)目(mu)共同詢價(jia)工(gong)作的(de)影響,加(jia)之連(lian)日惡劣(lie)雨(yu)天,施工(gong)進度緩慢,留給(gei)項(xiang)(xiang)目(mu)部完成吊(diao)裝施工(gong)的(de)時間已然(ran)不(bu)多,為(wei)確保施工(gong)全(quan)過程的(de)安全(quan)生產,項(xiang)(xiang)目(mu)部在QC小組(zu)指導下,爭分奪秒開展準備(bei)工(gong)作。

    該項工(gong)(gong)程(cheng)的質(zhi)量和(he)安(an)(an)全控制重(zhong)難(nan)點集(ji)中(zhong)于獨立桁(heng)架(jia)的吊(diao)(diao)裝,由于桁(heng)架(jia)跨度大,不能整榀拼裝后吊(diao)(diao)裝,需分段吊(diao)(diao)裝,高空對接,加上空間狹窄,無疑加大了吊(diao)(diao)車(che)作(zuo)業的難(nan)度。項目部充分結合現(xian)場作(zuo)業中(zhong)操作(zuo)安(an)(an)全性(xing)、工(gong)(gong)作(zuo)效(xiao)率、工(gong)(gong)程(cheng)質(zhi)量等多方(fang)面(mian)的考(kao)慮,采取(qu)減(jian)少高空作(zuo)業、增(zeng)加地(di)(di)面(mian)工(gong)(gong)作(zuo)量的解(jie)決方(fang)案,將36軸平面(mian)主桁(heng)架(jia)分成18榀,每榀由兩軸主桁(heng)架(jia)組裝而成,每榀先(xian)在地(di)(di)面(mian)完全組裝好后,再采用350噸的履帶吊(diao)(diao)進(jin)行吊(diao)(diao)裝。該方(fang)案的實施,較(jiao)大地(di)(di)降低了施工(gong)(gong)難(nan)度,提高了工(gong)(gong)作(zuo)效(xiao)率和(he)作(zuo)業安(an)(an)全。

    提(ti)高自重高達(da)350噸的履帶(dai)吊(diao)(diao)的安全作(zuo)業性,又給項(xiang)目(mu)部出了(le)新的難題(ti)。為滿足了(le)履帶(dai)吊(diao)(diao)對地基的高要(yao)求,在短(duan)短(duan)一個(ge)月時間內,項(xiang)目(mu)部組織人力物(wu)力,對路基進行分層鋪墊壓實,順利完(wan)成吊(diao)(diao)點和吊(diao)(diao)裝(zhuang)(zhuang)行走路線工(gong)程。科學(xue)合理的方案優化(hua),多次大雨(yu)或暴雨(yu)都未對拼裝(zhuang)(zhuang)場地、吊(diao)(diao)裝(zhuang)(zhuang)造成影(ying)響,為吊(diao)(diao)裝(zhuang)(zhuang)工(gong)作(zuo)做好最后(hou)一道工(gong)序準備(bei)。

沖刺節點,率先(xian)吊裝

    貴港體育中心(xin)工(gong)程(cheng)是貴港市“三(san)年目(mu)(mu)標任(ren)務行動計劃”重大民生建設項目(mu)(mu),肩(jian)負(fu)著企業誠信履(lv)約(yue)的(de)重任(ren)以及(ji)社會各界(jie)的(de)期盼,綜(zong)合體育館鋼結(jie)構QC小組頂住壓力,經(jing)過兩個緊鑼密鼓的(de)方案研究和(he)施(shi)工(gong)準備,攻克重重技術難(nan)關(guan),8月初,重達350噸的(de)履(lv)帶吊(diao)成功安裝(zhuang)(zhuang)并合格驗收,順利吊(diao)裝(zhuang)(zhuang)第一榀主桁架,率(lv)先于其他子公司進行鋼結(jie)構吊(diao)裝(zhuang)(zhuang)施(shi)工(gong)。

    在(zai)整(zheng)個吊(diao)裝(zhuang)過程中(zhong),項目部認真(zhen)按(an)加(jia)工(gong)(gong)質量和(he)安裝(zhuang)質量保(bao)證措施的(de)要求施工(gong)(gong),對現(xian)場(chang)施工(gong)(gong)人(ren)員進(jin)行(xing)(xing)詳細的(de)技(ji)術交底,現(xian)場(chang)管理人(ren)員定期(qi)巡查,現(xian)場(chang)操作(zuo)人(ren)員按(an)規范和(he)有關規定認真(zhen)操作(zuo),采取相應措施,從原(yuan)材料采購、鋼(gang)屋架加(jia)工(gong)(gong)、安裝(zhuang)、涂料全(quan)(quan)過程均進(jin)行(xing)(xing)全(quan)(quan)程監督、檢查。

    2014年12月底,在(zai)項(xiang)目(mu)部全體員工(gong)(gong)(gong)(gong)(gong)共同努力下(xia),鋼屋架施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)順利完成,經(jing)項(xiang)目(mu)部、公司(si)、監理公司(si)檢驗(yan),各(ge)檢查項(xiang)目(mu)平均合格率(lv)達到了(le)(le)99.2%,為(wei)整個項(xiang)目(mu)的(de)(de)(de)按時竣工(gong)(gong)(gong)(gong)(gong)、誠信履約(yue)奠定了(le)(le)堅實(shi)基礎,其桁(heng)(heng)架施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)技術(shu)獲得貴港市(shi)主管(guan)部門、建設單位的(de)(de)(de)好評。該工(gong)(gong)(gong)(gong)(gong)程從桁(heng)(heng)架制作(zuo)、焊接(jie)工(gong)(gong)(gong)(gong)(gong)藝、桁(heng)(heng)架安裝(zhuang)、涂裝(zhuang)工(gong)(gong)(gong)(gong)(gong)藝等方面的(de)(de)(de)質量都得到有效(xiao)(xiao)保證(zheng),大(da)大(da)節(jie)約(yue)材料費、機械費和(he)人工(gong)(gong)(gong)(gong)(gong)費。施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)過程中,不僅克服空(kong)間狹窄,吊(diao)車(che)工(gong)(gong)(gong)(gong)(gong)作(zuo)起來困難(nan)的(de)(de)(de)難(nan)點,還成功解(jie)決(jue)桁(heng)(heng)架施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)中的(de)(de)(de)分段吊(diao)裝(zhuang)、高空(kong)對(dui)接(jie)復雜工(gong)(gong)(gong)(gong)(gong)藝技術(shu)的(de)(de)(de)難(nan)題,為(wei)在(zai)該領域施(shi)(shi)工(gong)(gong)(gong)(gong)(gong)積累了(le)(le)寶貴的(de)(de)(de)技術(shu)經(jing)驗(yan),取得了(le)(le)明顯的(de)(de)(de)經(jing)濟和(he)社(she)會效(xiao)(xiao)益。(記者:黃佳丹 通訊員:馮(feng)文生/采寫(xie))

 


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