文章來源：中國鐵道建(jian)筑(zhu)有限公司 發(fa)布時(shi)間：2019-02-11
近(jin)日，由中國(guo)鐵建所屬中鐵十(shi)一局五公司(si)承(cheng)建的(de)被譽為“國(guo)內(nei)第一深水樁”的(de)彭溪河多(duo)線特大橋首根(gen)樁基成(cheng)功澆(jiao)筑。
彭溪河多線特大橋為(wei)(wei)鄭(zheng)萬鐵(tie)路全(quan)線重難(nan)點(dian)控(kong)制性工(gong)(gong)(gong)程(cheng)(cheng)之(zhi)一，其施(shi)工(gong)(gong)(gong)工(gong)(gong)(gong)藝復(fu)雜(za)、技(ji)術(shu)難(nan)度大、安(an)全(quan)風險高(gao)，也是鄭(zheng)萬鐵(tie)路的(de)關鍵控(kong)制性工(gong)(gong)(gong)程(cheng)(cheng)。大橋結構形式為(wei)(wei)四線變二(er)線道(dao)岔梁(liang)連(lian)續鋼拱(gong)橋，主跨長度達(da)200米，其中(zhong)主墩(dun)10#、11#墩(dun)橫穿(chuan)三峽庫區，設計(ji)在彭溪河深(shen)水(shui)(shui)區范圍，最高(gao)水(shui)(shui)深(shen)約60米，為(wei)(wei)國內第一深(shen)水(shui)(shui)樁(zhuang)(zhuang)，且樁(zhuang)(zhuang)基(ji)位于深(shen)水(shui)(shui)下斜坡上(shang)，地址主要(yao)為(wei)(wei)花崗巖，成(cheng)孔非常困難(nan)，施(shi)工(gong)(gong)(gong)難(nan)度極大。經過專家組現場多次勘(kan)查(cha)，反復(fu)研討(tao)施(shi)工(gong)(gong)(gong)技(ji)術(shu)方案(an)，確定采(cai)用高(gao)樁(zhuang)(zhuang)棧橋搭建鉆(zhan)孔平臺方法進(jin)行水(shui)(shui)中(zhong)樁(zhuang)(zhuang)基(ji)施(shi)工(gong)(gong)(gong)，樁(zhuang)(zhuang)基(ji)施(shi)工(gong)(gong)(gong)工(gong)(gong)(gong)藝采(cai)用反循環清孔撈(lao)渣鉆(zhan)孔灌注施(shi)工(gong)(gong)(gong)。
為確保(bao)“國內第一深水樁(zhuang)”首根樁(zhuang)基成(cheng)(cheng)功(gong)澆(jiao)筑(zhu)，項目部(bu)(bu)結合(he)工(gong)程特點(dian)，嚴格按照(zhao)確定的(de)水中(zhong)樁(zhuang)基首件施(shi)(shi)工(gong)方(fang)案執行(xing)。科學合(he)理(li)地(di)組織調配各類資源(yuan)；專(zhuan)人盯控(kong)(kong)混凝土供(gong)應質量及(ji)速度，現(xian)場(chang)技術(shu)人員(yuan)通過對(dui)樁(zhuang)基成(cheng)(cheng)孔(kong)質量進行(xing)檢(jian)驗、導管安(an)裝質量氣密檢(jian)測(ce)、料(liao)斗(dou)設計、抗浮籠預(yu)控(kong)(kong)等(deng)技術(shu)分析(xi)，對(dui)施(shi)(shi)工(gong)各工(gong)序細部(bu)(bu)環節(jie)有效把(ba)控(kong)(kong)；施(shi)(shi)工(gong)過程中(zhong)，項目部(bu)(bu)對(dui)鋼棧橋及(ji)鉆孔(kong)平臺結構全(quan)程位移監控(kong)(kong)；對(dui)渡船、吊車等(deng)設備提(ti)前(qian)檢(jian)修，制定環保(bao)方(fang)面管理(li)措(cuo)施(shi)(shi)，確保(bao)施(shi)(shi)工(gong)安(an)全(quan)與(yu)環保(bao)；同時為確保(bao)灌(guan)注過程中(zhong)混凝土順利送達(da)，還制定了應急方(fang)案，并與(yu)當地(di)政府一起協(xie)心齊力保(bao)障道路(lu)交通。
經過近(jin)6.5個小時緊張有序施工，“國內第一(yi)深水樁”首根(gen)樁基(ji)成功澆筑，為鄭萬鐵路云陽段(duan)建設推(tui)進打下(xia)了扎實基(ji)礎。
【責任(ren)編輯：駱秧(yang)秧(yang)】