文(wen)章來源：中國(guo)鐵道(dao)建筑有限公司 發(fa)布(bu)時間：2019-02-11
近日，由中國(guo)鐵建所屬中鐵十一局五公(gong)司承建的被(bei)譽為“國(guo)內第(di)一深水樁”的彭溪(xi)河多線特(te)大橋首根樁基成功澆筑。
彭(peng)溪河(he)多線(xian)特大(da)橋(qiao)為(wei)鄭萬(wan)鐵路全(quan)線(xian)重難(nan)點(dian)控制性(xing)工(gong)(gong)(gong)程之(zhi)一(yi)，其施(shi)(shi)工(gong)(gong)(gong)工(gong)(gong)(gong)藝(yi)復(fu)雜、技(ji)(ji)術(shu)難(nan)度大(da)、安全(quan)風險高(gao)，也是鄭萬(wan)鐵路的關鍵控制性(xing)工(gong)(gong)(gong)程。大(da)橋(qiao)結構形式為(wei)四線(xian)變二線(xian)道(dao)岔(cha)梁連續鋼拱橋(qiao)，主跨長度達200米，其中主墩10#、11#墩橫(heng)穿(chuan)三峽庫區，設計在彭(peng)溪河(he)深(shen)水區范圍，最(zui)高(gao)水深(shen)約60米，為(wei)國(guo)內第一(yi)深(shen)水樁(zhuang)，且樁(zhuang)基位于深(shen)水下斜坡上(shang)，地址主要為(wei)花(hua)崗巖，成孔非(fei)常困難(nan)，施(shi)(shi)工(gong)(gong)(gong)難(nan)度極(ji)大(da)。經(jing)過專(zhuan)家組現場多次(ci)勘查，反復(fu)研討施(shi)(shi)工(gong)(gong)(gong)技(ji)(ji)術(shu)方案(an)，確定(ding)采(cai)用高(gao)樁(zhuang)棧橋(qiao)搭建鉆孔平臺方法進行水中樁(zhuang)基施(shi)(shi)工(gong)(gong)(gong)，樁(zhuang)基施(shi)(shi)工(gong)(gong)(gong)工(gong)(gong)(gong)藝(yi)采(cai)用反循環清孔撈渣鉆孔灌注施(shi)(shi)工(gong)(gong)(gong)。
為(wei)確(que)保“國內第(di)一深水(shui)樁”首根樁基(ji)成(cheng)功澆筑，項目(mu)部結(jie)合工(gong)(gong)程特點，嚴(yan)格按照確(que)定(ding)的(de)水(shui)中(zhong)樁基(ji)首件(jian)施(shi)(shi)工(gong)(gong)方(fang)案(an)執行。科學合理(li)地(di)組織調(diao)配各(ge)類資源；專(zhuan)人盯控混(hun)凝(ning)(ning)土供應質量及速度，現(xian)場(chang)技術(shu)人員通(tong)過(guo)對樁基(ji)成(cheng)孔質量進行檢驗、導管安(an)裝(zhuang)質量氣密檢測、料斗設計、抗浮(fu)籠(long)預控等(deng)技術(shu)分析(xi)，對施(shi)(shi)工(gong)(gong)各(ge)工(gong)(gong)序(xu)細部環節(jie)有效把控；施(shi)(shi)工(gong)(gong)過(guo)程中(zhong)，項目(mu)部對鋼棧(zhan)橋及鉆(zhan)孔平臺(tai)結(jie)構全程位移監控；對渡船、吊(diao)車等(deng)設備提(ti)前檢修，制(zhi)定(ding)環保方(fang)面管理(li)措施(shi)(shi)，確(que)保施(shi)(shi)工(gong)(gong)安(an)全與(yu)環保；同時為(wei)確(que)保灌注過(guo)程中(zhong)混(hun)凝(ning)(ning)土順(shun)利送(song)達，還(huan)制(zhi)定(ding)了(le)應急方(fang)案(an)，并與(yu)當地(di)政(zheng)府一起協心(xin)齊力(li)保障(zhang)道路交通(tong)。
經過近6.5個小時(shi)緊張有序(xu)施工，“國內第一(yi)深水樁”首根樁基成功澆筑(zhu)，為(wei)鄭萬鐵路云陽段建設推進打下了扎實(shi)基礎。
【責任編輯(ji)：駱秧(yang)秧(yang)】