高架橋系梁施工技術(shù)交底

湖南瀏至醴陵高速公路第十三合同段毛連灣高架橋〔K80+0〕系梁施工技術(shù)交底浙詠公路工程二0一0年七月制墩樁頂〔系梁頂〕標(biāo)高系梁高〔m〕鎖口標(biāo)高設(shè)計(jì)樁底標(biāo)高樁長(zhǎng)〔鎖口到設(shè)計(jì)樁底〕〔m〕0-078.2040-178.2040-278.4290-378.4291-01.668.1001-11.668.1001-268.1001-368.1002-01.663.1002-11.663.1002-284.6001.684.97263.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0262-384.6001.684.86363.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0263-085.6001.686.13566.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0263-185.6001.685.54166.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0263-284.9001.685.44166.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0263-384.9001.685.12566.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0264-086.3001.687.80866.30021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0264-186.3001.686.04166.30021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0264-285.8001.686.12066.30021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0264-385.8001.685.83666.30021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0265-086.2001.687.866.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0265-186.2001.686.00566.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0265-284.7001.685.84066.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0265-384.7001.685.88366.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0266-0.7001.6.90170.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0266-1.7001.6.970.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0266-285.7001.688.32765.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0266-385.7001.685.93665.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0267-091.1001.692.90270.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0267-191.1001.690.55570.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0267-288.1001.690.426.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0267-388.1001.688.126.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.026毛連灣高架橋底系梁施工技術(shù)交底毛連灣高架橋樁基已灌注24根。底系梁施工即將全面展開。為保證底系梁的施工質(zhì)量。將對(duì)橋梁施工隊(duì)進(jìn)展如下交底。工程概況毛連灣高架橋整體線性處于R=2400m的圓曲線上底系梁分左、右幅徑向布置。設(shè)計(jì)底系梁共13處。與設(shè)計(jì)代表協(xié)商1-2～1-3的底系梁取消改為樁柱一體。其中1-2作接樁處理。按橋柱尺寸施工。由于毛連灣橋系梁高程變更今將底系梁的頂、底面高程列出。詳細(xì)見表一。施工工藝流程測(cè)量放線施工石線機(jī)械開挖基坑人工清底5cm石渣墊層10#砂漿鋪底澆筑破樁頭 測(cè)量放樣〔樁中心點(diǎn)〕放出中心線、模板安裝邊線安裝鋼筋安裝定型模板檢查驗(yàn)收鋼筋、模板澆筑砼拆模養(yǎng)護(hù)驗(yàn)收主要工序施工要求基坑開挖本工序主要是機(jī)械施工配合人工清底?；娱_挖一定要在底系梁邊線外加寬一邊最少1m另一邊最少寬1.8m保證模板安裝的工作面。在基坑周圍開挖排水坑有集水井保證基坑不積水。人工清底要低于設(shè)計(jì)高程0.1m15#素砼封底找平。用墨斗彈出中心線、模板內(nèi)邊線。破樁頭本工序主要用風(fēng)鎬機(jī)將設(shè)計(jì)高程以上超高局部的砼鑿除。樁頭周邊鑿到設(shè)計(jì)高程中間部份高出2-3cm。用水將樁基上面沖洗干凈。測(cè)量放出中心點(diǎn)使整個(gè)系梁的幾何空間位置滿足設(shè)計(jì)要求。鋼筋制作及安裝立柱鋼筋籠與樁基鋼筋籠對(duì)接長(zhǎng)度為1.6m焊前綁直按長(zhǎng)、中、下三段單面焊每段焊長(zhǎng)100mm。鋼筋成形呈微錐形鋼筋重疊補(bǔ)強(qiáng)變徑區(qū)的受力才能。要保證樁基中心與立柱中心在同一個(gè)點(diǎn)的鉛垂線上。立柱必須用風(fēng)纜固定。系梁鋼筋按設(shè)計(jì)圖紙、按數(shù)量、規(guī)格、尺寸、位置安放并焊接結(jié)實(shí)。模板安裝定型系梁模板用吊車員裝到位。上下用對(duì)拉螺桿拉緊處圍用斜支撐固定。澆筑砼模板安裝驗(yàn)收后進(jìn)展下道工序澆筑砼砼坍落度控制在90mm砼進(jìn)倉(cāng)采用斜形分層先兩側(cè)立柱孔然后系梁中心分層厚度≤50cm振動(dòng)棒插入快拔出慢振動(dòng)范圍為0.5m嚴(yán)禁振動(dòng)棒觸振模板施工時(shí)振搗器絕對(duì)不能觸碰模板及鋼筋否那么會(huì)影響砼的外表質(zhì)量最后工序?yàn)橥獗硎展?。預(yù)埋件的安裝為便于今后對(duì)樁基進(jìn)展沉降觀測(cè)在樁基內(nèi)側(cè)25cm處預(yù)埋Φ20*60cm鋼筋兩根高出系梁外表1-1.5m。拆模澆筑24小時(shí)后拆模吊車、人工配合。模板拆卸過程中不準(zhǔn)碰撞系梁。以免傷及系梁影響外表美觀。砼養(yǎng)護(hù)用水澆進(jìn)展常規(guī)養(yǎng)護(hù)外表覆蓋草袋或麻袋養(yǎng)護(hù)時(shí)間以7天為宜。檢驗(yàn)及驗(yàn)收開挖基坑、鋼筋綁扎安裝、立柱鋼筋籠、模板安裝每道工序完成后都要請(qǐng)監(jiān)理工程師進(jìn)展驗(yàn)收合格后才能進(jìn)展下道工序的施工。澆筑砼7天后回彈儀檢測(cè)合格前方可回填。質(zhì)量基底的平面位置高程允許偏向規(guī)定如下：平面周線位置不小于設(shè)計(jì)要求?；赘叱蹋和临|(zhì)±50mm石質(zhì)+50mm-200mm軸線偏位25mm檢查基底處理和排水情況是否符合要求檢查施工和有關(guān)實(shí)驗(yàn)資料鋼筋砼系梁質(zhì)量：工程規(guī)定允許偏向砼強(qiáng)度在合格內(nèi)軸線偏位〔mm〕30外形尺寸〔mm〕0+30傾斜度0．5頂面高程〔mm〕±10沉淀厚度符合設(shè)計(jì)要求平安措施基坑深度超過1.5m應(yīng)按規(guī)定設(shè)置上下坡道或爬梯汛開挖時(shí)要放緩邊坡作為排水措施。加強(qiáng)現(xiàn)場(chǎng)施工理施工現(xiàn)場(chǎng)工作人員必須戴好平安帽及其他平安防護(hù)用品。基坑周圍必須設(shè)置圍欄一般加高0.8m的圍護(hù)欄挖出的土方運(yùn)離基坑。機(jī)動(dòng)車通行不得危及坑壁的平安以防坍塌。施工現(xiàn)場(chǎng)電工須持證上崗。施工地段設(shè)置各種警告標(biāo)志間應(yīng)有良好的照明設(shè)施車輛應(yīng)限速行駛。嚴(yán)禁非駕駛員開車或