
公(gong)路(lu)墩(dun)為(wei)空心薄(bo)壁墩(dun):墩(dun)身混凝(ning)土施(shi)工(gong)可采用滑模(mo)或翻(fan)模(mo)施(shi)工(gong),施(shi)工(gong)注意新老(lao)混凝(ning)土結(jie)合面的清洗(xi)和(he)鑿毛,
為使(shi)全橋(qiao)顏色一(yi)致,宜選用同一(yi)種(zhong)水泥.在進行(xing)墩(dun)身施工時(shi)應注意安裝(zhuang)主梁零號塊(kuai)托(tuo)架的預埋構件.主墩(dun)身第一(yi)
次澆注時應至少澆筑2米(mi)高度(du)(du)的空(kong)心墩(dun)柱,即主墩(dun)第(di)一節(jie)高度(du)(du)至少應達到4.5米(mi),以(yi)減少剛度(du)(du)突變帶來的混凝(ning)土
收縮裂縫.墩身(shen)(shen)垂直度允許(xu)偏差(cha)(cha)不(bu)(bu)得(de)大(da)于(yu)(yu)1/1000,且墩身(shen)(shen)各斷面(mian)(mian)中心位置與(yu)設(she)計位置偏差(cha)(cha)不(bu)(bu)得(de)大(da)于(yu)(yu)2厘米(mi).墩身(shen)(shen)表(biao)面(mian)(mian)需(xu)安裝貼面(mian)(mian)冷軋帶肋鋼筋(jin)(jin)焊網,網片(pian)之間的接(jie)長采用插(cha)接(jie),插(cha)接(jie)長杜不(bu)(bu)小于(yu)(yu)20厘米(mi).墩身(shen)(shen)和承臺之間的混凝土澆注齡期差(cha)(cha)不(bu)(bu)得(de)大(da)于(yu)(yu)20天.墩身(shen)(shen)均未設(she)置爬梯和通風孔,施工(gong)單(dan)位可根據(ju)需(xu)要進行設(she)置,但(dan)不(bu)(bu)可截斷原有(you)結構鋼筋(jin)(jin).
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