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近日，由中國鐵建(jian)所屬中鐵十一局五公司(si)承(cheng)建(jian)的(de)被譽為“國內第一深水樁”的(de)彭溪河(he)多線(xian)特大橋首根樁基成功澆(jiao)筑。

彭(peng)溪河(he)多線(xian)(xian)特大(da)橋(qiao)為鄭萬(wan)鐵路全線(xian)(xian)重難點(dian)控制(zhi)(zhi)性工(gong)(gong)(gong)程之一，其施工(gong)(gong)(gong)工(gong)(gong)(gong)藝復(fu)雜、技術(shu)難度大(da)、安(an)全風險高，也是(shi)鄭萬(wan)鐵路的關鍵(jian)控制(zhi)(zhi)性工(gong)(gong)(gong)程。大(da)橋(qiao)結構(gou)形式為四(si)線(xian)(xian)變二線(xian)(xian)道岔梁(liang)連續鋼拱橋(qiao)，主跨長度達(da)200米(mi)，其中主墩(dun)10#、11#墩(dun)橫穿三峽庫區(qu)，設計在彭(peng)溪河(he)深(shen)(shen)水區(qu)范圍，最高水深(shen)(shen)約(yue)60米(mi)，為國內第(di)一深(shen)(shen)水樁(zhuang)(zhuang)(zhuang)，且樁(zhuang)(zhuang)(zhuang)基位于深(shen)(shen)水下斜(xie)坡上，地址主要為花(hua)崗(gang)巖，成孔非常困難，施工(gong)(gong)(gong)難度極大(da)。經過專家組(zu)現場多次勘查(cha)，反復(fu)研討施工(gong)(gong)(gong)技術(shu)方(fang)案，確(que)定(ding)采用高樁(zhuang)(zhuang)(zhuang)棧橋(qiao)搭建鉆孔平臺方(fang)法進(jin)行水中樁(zhuang)(zhuang)(zhuang)基施工(gong)(gong)(gong)，樁(zhuang)(zhuang)(zhuang)基施工(gong)(gong)(gong)工(gong)(gong)(gong)藝采用反循環清孔撈渣鉆孔灌注(zhu)施工(gong)(gong)(gong)。

為(wei)(wei)確保(bao)“國內第一深水(shui)樁(zhuang)”首根樁(zhuang)基成(cheng)(cheng)功澆筑(zhu)，項目(mu)部結合工(gong)(gong)程(cheng)(cheng)特點，嚴格按照確定的水(shui)中樁(zhuang)基首件施(shi)(shi)(shi)工(gong)(gong)方案(an)執行。科(ke)學合理地(di)組織調配(pei)各類資源；專人盯控(kong)混(hun)凝(ning)土供應(ying)質(zhi)量(liang)及速(su)度，現(xian)場技(ji)術人員通(tong)過對樁(zhuang)基成(cheng)(cheng)孔(kong)質(zhi)量(liang)進行檢驗、導管(guan)(guan)安裝質(zhi)量(liang)氣密檢測、料斗設計(ji)、抗浮籠預控(kong)等技(ji)術分析(xi)，對施(shi)(shi)(shi)工(gong)(gong)各工(gong)(gong)序(xu)細部環(huan)(huan)節有(you)效把控(kong)；施(shi)(shi)(shi)工(gong)(gong)過程(cheng)(cheng)中，項目(mu)部對鋼(gang)棧橋及鉆孔(kong)平臺結構全程(cheng)(cheng)位(wei)移(yi)監控(kong)；對渡(du)船、吊車等設備(bei)提前檢修(xiu)，制定環(huan)(huan)保(bao)方面管(guan)(guan)理措(cuo)施(shi)(shi)(shi)，確保(bao)施(shi)(shi)(shi)工(gong)(gong)安全與環(huan)(huan)保(bao)；同時為(wei)(wei)確保(bao)灌注過程(cheng)(cheng)中混(hun)凝(ning)土順(shun)利送(song)達(da)，還(huan)制定了應(ying)急方案(an)，并與當地(di)政(zheng)府一起協心齊(qi)力保(bao)障道路交通(tong)。

經過近6.5個小時緊張有序施工，“國內(nei)第一深水樁(zhuang)(zhuang)”首根(gen)樁(zhuang)(zhuang)基成功澆筑(zhu)，為鄭萬鐵路云陽段建設推進打下(xia)了扎實基礎。

【責任(ren)編輯：駱秧(yang)秧(yang)】