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安裝球形支座的常規步驟
添加時間:2022-04-19 點擊量:
球形支(zhi)座慣例(li)的裝(zhuang)置步驟
① 墩臺(tai)預處理
(1)墩臺外表(biao)鑿毛,顯露粗骨料,呈堅固不規則(ze)外表(biao)。(2)支(zhi)(zhi)座(zuo)(zuo)預留孔(kong)(kong)(kong)處理(li),預留孔(kong)(kong)(kong)深(shen)(shen)度和(he)直徑(jing)必(bi)須大于支(zhi)(zhi)座(zuo)(zuo)套筒或底(di)柱的(de)預埋長度和(he)直徑(jing),一般(ban)直徑(jing)和(he)深(shen)(shen)度均大于60mm,并清除預留孔(kong)(kong)(kong)中的(de)雜物(wu)。(3)確認支(zhi)(zhi)座(zuo)(zuo)規劃(hua)位置中心線。
②支座就位
(1)底板上(shang)劃出中(zhong)心線(xian),并與墩(dun)臺支座(zuo)規劃中(zhong)心線(xian)對齊。(2)調(diao)整支座(zuo)水平。
③灌漿
(1)支模,進行重(zhong)力灌漿(jiang)。(2)待砂漿(jiang)硬化后撤除模板。
④橋梁部分施工
(1)梁(liang)(liang)底(di)(di)(di)預(yu)(yu)埋(mai)鋼板(ban)裝置(zhi)(zhi):梁(liang)(liang)底(di)(di)(di)預(yu)(yu)埋(mai)鋼板(ban)中(zhong)心(xin)線與支(zhi)(zhi)座頂(ding)板(ban)中(zhong)心(xin)線對齊,梁(liang)(liang)底(di)(di)(di)預(yu)(yu)埋(mai)鋼板(ban)與支(zhi)(zhi)座頂(ding)板(ban)之(zhi)間(jian)不能有(you)空隙。(2)地腳(jiao)螺栓裝置(zhi)(zhi):將地腳(jiao)螺栓穿入頂(ding)板(ban)地腳(jiao)螺栓孔(kong)并旋入底(di)(di)(di)柱內,梁(liang)(liang)底(di)(di)(di)預(yu)(yu)埋(mai)鋼板(ban)中(zhong)心(xin)線與支(zhi)(zhi)座頂(ding)板(ban)中(zhong)心(xin)線對齊,在確保梁(liang)(liang)底(di)(di)(di)預(yu)(yu)埋(mai)鋼板(ban)與支(zhi)(zhi)座頂(ding)板(ban)之(zhi)間(jian)沒空隙的(de)情況下,把(ba)底(di)(di)(di)柱與梁(liang)(liang)底(di)(di)(di)預(yu)(yu)埋(mai)鋼板(ban)焊接在一(yi)起。(3)支(zhi)(zhi)梁(liang)(liang)體模(mo)板(ban):梁(liang)(liang)體模(mo)板(ban)裝置(zhi)(zhi)完成后(hou)進(jin)行(xing)混(hun)凝土的(de)澆筑及維護。
⑤待梁體混凝土到達規劃強度后撤除支座臨時銜接
在支(zhi)(zhi)座裝置過(guo)程(cheng)中,支(zhi)(zhi)座就位是關鍵工(gong)序(xu)之一,最為耗時,如(ru)操控欠好還較簡單發(fa)生質(zhi)量問題。支(zhi)(zhi)座的四(si)個角高(gao)差不得(de)大于2mm,支(zhi)(zhi)座中線(xian)與墩臺(tai)支(zhi)(zhi)座規(gui)劃軸線(xian)完(wan)全重(zhong)合,不允許有誤差。傳(chuan)統的施工(gong)工(gong)藝是:首(shou)先將支(zhi)(zhi)座縱、橫向中線(xian)與規(gui)劃支(zhi)(zhi)座縱橫軸線(xian)對齊,然后(hou)四(si)周(zhou)使用鋼楔塊將支(zhi)(zhi)座保持在水平(ping)狀態下調整到(dao)規(gui)劃高(gao)程(cheng)。
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