(张官高速洞(dong)庭(ting)溪(xi)沅水特大桥(qiao)施(shi)工现(xian)场(chang)。通讯(xun)员摄)

 湖南(nan)日报1月18日讯(通讯员 陈万山 栾子尧)1月10日晚,经过连续17个小(xiao)时的(de)攻坚奋(fen)战,张官高速洞庭溪沅(yuan)水特大桥(qiao)官庄岸(an)索塔下(xia)横梁顺利(li)完(wan)成首次浇筑(zhu),为(wei)大桥(qiao)主塔“登顶”打下(xia)扎实基础(chu)。

 洞庭溪沅水特大(da)(da)桥(qiao)(qiao)由(you)湖南(nan)建(jian)投集团旗下湖南(nan)AG九游国际承(cheng)建(jian),主塔下横(heng)梁(liang)高(gao)9米(mi)(mi)(mi),顺(shun)桥(qiao)(qiao)向宽7米(mi)(mi)(mi),横(heng)桥(qiao)(qiao)向宽28米(mi)(mi)(mi),分两次浇(jiao)筑。首次浇(jiao)筑至底(di)拱以上2.4米(mi)(mi)(mi),浇(jiao)筑方量396.85方,主要承(cheng)受(shou)桥(qiao)(qiao)面(mian)荷载,同(tong)时保证两侧(ce)主塔受(shou)力稳定。下横(heng)梁(liang)底(di)部呈圆弧形,内(nei)腔室倒角多且高(gao)度变化大(da)(da),钢筋、预(yu)应(ying)力密集,结构尺寸(cun)控制难度大(da)(da)。此(ci)外,采(cai)用C55混凝土(tu),对混凝土(tu)浇(jiao)筑质(zhi)量控制要求(qiu)高(gao)。施工(gong)支(zhi)架(jia)采(cai)用高(gao)空(kong)牛腿支(zhi)架(jia),支(zhi)架(jia)体系最大(da)(da)离地高(gao)度54米(mi)(mi)(mi),大(da)(da)件(jian)吊(diao)装(zhuang)、高(gao)空(kong)焊接(jie)等(deng)大(da)(da)大(da)(da)增加(jia)了安全(quan)、质(zhi)量、施工(gong)组织等(deng)方面(mian)的难度。

 为确保下横梁施(shi)(shi)(shi)(shi)工(gong)(gong)的安全(quan)优质高效,项目部采取了“塔(ta)梁异步(bu)施(shi)(shi)(shi)(shi)工(gong)(gong)”“方案专(zhuan)家评(ping)审”和施(shi)(shi)(shi)(shi)工(gong)(gong)全(quan)过(guo)程“实时监控”等措施(shi)(shi)(shi)(shi),为下横梁施(shi)(shi)(shi)(shi)工(gong)(gong)稳步(bu)推进保驾(jia)护航。通过(guo)BIM受力分(fen)析不断优化工(gong)(gong)艺顺序,现场与幕后无缝衔(xian)接,将(jiang)“塔(ta)梁异步(bu)”施(shi)(shi)(shi)(shi)工(gong)(gong)发挥到极致。