文章(zhang)來源：中國(guo)鐵(tie)道建筑有限公司 發布時間(jian)：2019-02-11
近(jin)日，由中(zhong)國鐵(tie)建所屬(shu)中(zhong)鐵(tie)十(shi)一局五公司承建的被譽為“國內第一深水樁”的彭溪河(he)多線(xian)特大橋(qiao)首(shou)根樁基(ji)成(cheng)功澆筑。
彭溪(xi)河多線(xian)特(te)大(da)(da)橋(qiao)(qiao)為(wei)鄭(zheng)萬鐵(tie)路(lu)全(quan)線(xian)重難(nan)點控制性(xing)工(gong)(gong)程之(zhi)一，其(qi)施工(gong)(gong)工(gong)(gong)藝復雜、技術(shu)難(nan)度大(da)(da)、安全(quan)風險高(gao)(gao)，也是(shi)鄭(zheng)萬鐵(tie)路(lu)的關鍵控制性(xing)工(gong)(gong)程。大(da)(da)橋(qiao)(qiao)結(jie)構形式為(wei)四線(xian)變二(er)線(xian)道岔梁連續鋼拱橋(qiao)(qiao)，主(zhu)跨長度達200米，其(qi)中主(zhu)墩(dun)10#、11#墩(dun)橫穿三峽庫區，設計在彭溪(xi)河深(shen)水(shui)區范圍，最(zui)高(gao)(gao)水(shui)深(shen)約(yue)60米，為(wei)國內第(di)一深(shen)水(shui)樁，且(qie)樁基位于深(shen)水(shui)下(xia)斜(xie)坡上，地址主(zhu)要為(wei)花崗(gang)巖，成孔非常(chang)困難(nan)，施工(gong)(gong)難(nan)度極大(da)(da)。經過專家(jia)組現(xian)場多次(ci)勘查，反復研討施工(gong)(gong)技術(shu)方案，確定采用高(gao)(gao)樁棧橋(qiao)(qiao)搭建鉆(zhan)孔平臺方法進(jin)行水(shui)中樁基施工(gong)(gong)，樁基施工(gong)(gong)工(gong)(gong)藝采用反循環清孔撈渣(zha)鉆(zhan)孔灌注施工(gong)(gong)。
為(wei)確保(bao)(bao)(bao)“國內第(di)一(yi)深水(shui)樁(zhuang)(zhuang)”首(shou)根樁(zhuang)(zhuang)基(ji)成(cheng)功澆(jiao)筑(zhu)，項目(mu)部結(jie)合(he)工(gong)(gong)程特(te)點，嚴格按照確定(ding)的(de)水(shui)中(zhong)樁(zhuang)(zhuang)基(ji)首(shou)件施(shi)(shi)工(gong)(gong)方案(an)執行。科學(xue)合(he)理地組織調(diao)配各類資源；專人盯控(kong)(kong)混(hun)凝土(tu)供應(ying)質(zhi)量及速度(du)，現場(chang)技術(shu)人員通(tong)過對樁(zhuang)(zhuang)基(ji)成(cheng)孔(kong)質(zhi)量進行檢驗、導管安(an)裝質(zhi)量氣(qi)密檢測、料斗(dou)設計、抗浮籠預控(kong)(kong)等技術(shu)分析，對施(shi)(shi)工(gong)(gong)各工(gong)(gong)序細部環(huan)(huan)節(jie)有(you)效把控(kong)(kong)；施(shi)(shi)工(gong)(gong)過程中(zhong)，項目(mu)部對鋼棧橋(qiao)及鉆孔(kong)平(ping)臺結(jie)構全(quan)程位移監控(kong)(kong)；對渡船、吊車等設備(bei)提前檢修(xiu)，制定(ding)環(huan)(huan)保(bao)(bao)(bao)方面管理措(cuo)施(shi)(shi)，確保(bao)(bao)(bao)施(shi)(shi)工(gong)(gong)安(an)全(quan)與(yu)環(huan)(huan)保(bao)(bao)(bao)；同時為(wei)確保(bao)(bao)(bao)灌注過程中(zhong)混(hun)凝土(tu)順利送達，還制定(ding)了應(ying)急方案(an)，并與(yu)當地政府一(yi)起協心齊力保(bao)(bao)(bao)障(zhang)道路交通(tong)。
經(jing)過近6.5個(ge)小時緊張有序施(shi)工，“國內第一深水樁”首根樁基成功澆筑，為(wei)鄭萬鐵路云陽段建設推進打下(xia)了扎(zha)實基礎。
【責任編輯：駱秧秧】