預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治措施武漢市市政工程質(zhì)量監(jiān)督站何祖亮2018年3月預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及1主要內(nèi)容1預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題2預(yù)應(yīng)力混凝土橋梁病害分析3預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題的防治措施主要內(nèi)容2應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題預(yù)應(yīng)力技術(shù)在橋梁施工中廣泛應(yīng)用,但施工過(guò)程中控制不好就會(huì)出現(xiàn)預(yù)應(yīng)力不足或超過(guò)、預(yù)應(yīng)力方向不符合設(shè)計(jì)、壓漿不飽滿等情況,最終導(dǎo)致構(gòu)件出現(xiàn)裂縫等病害,影響橋梁整體承載力,給橋梁留下質(zhì)量、安全隱患。病害主要發(fā)生在以下兩個(gè)主要階段:準(zhǔn)備階段施工階段(張拉、壓漿、放張、封錨)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題3常見(jiàn)施工質(zhì)量問(wèn)題準(zhǔn)備階段■預(yù)應(yīng)力筋銹蝕、斷裂預(yù)應(yīng)力施工機(jī)具使用不規(guī)范■預(yù)應(yīng)力筋、波紋管定位安裝不準(zhǔn)■鋼絞線發(fā)生纏繞錨板位置不準(zhǔn)■錨下螺旋筋遺漏或匝數(shù)與設(shè)計(jì)不符常見(jiàn)施工質(zhì)量問(wèn)題4常見(jiàn)施工質(zhì)量問(wèn)題施工階段預(yù)應(yīng)力筋滑絲、斷絲上拱度不符合要求(上拱度過(guò)大、不足或梁體側(cè)彎)后張法預(yù)應(yīng)力管道堵管(多數(shù)是管道破損引起)放張順序不對(duì)或采用切割鋼絞線放張預(yù)應(yīng)力筋張拉未采取雙控壓漿不飽滿、不及時(shí)封錨不規(guī)范未做同條件試塊或同條件試塊未隨梁養(yǎng)護(hù)預(yù)應(yīng)力筋切割方式不規(guī)范預(yù)應(yīng)力混凝土錨下裂縫張拉記錄及壓漿記錄與現(xiàn)場(chǎng)施工脫節(jié),不能真實(shí)反映施工情況常見(jiàn)施工質(zhì)量問(wèn)題5預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件6預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件7預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件8預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件9預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件10預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件11預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件12預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件13預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件14預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件15預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件16預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件17預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件18預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件19預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件20預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件21預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件22預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件23預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件24預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件25預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件26預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件27預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件28預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件29預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件30預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件31預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件32預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件33預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件34預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件35預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件36預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件37預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件38預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件39預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件40預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件41預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件42預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件43預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件44預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件45預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件46預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件47預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件48預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件49預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件50預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件51預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件52預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件53預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件54預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件55預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件56預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件57預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件58預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件59預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件60預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件61預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件62預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件63預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件64預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件65預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件66預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件67預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件68預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件69預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件70預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量問(wèn)題及防治的措施76課件71預(yù)應(yīng)力混凝土橋梁施工常見(jiàn)質(zhì)量