高架橋系梁施工技術(shù)交底

1、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)高樁長鎖口到設(shè)計(jì)樁底m0-078.2040-178.2040-278.4290-378.4291-01.668.1001-11.668.1001-268.1001-368.1002-01.663.1002-11.663.1002-284.6001.684.97263.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.22

2、2.62720.23622.80220.45526.32624.0262-384.6001.684.86363.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0263-085.6001.686.13566.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.2011

3、9.222.62720.23622.80220.45526.32624.0263-185.6001.685.54166.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0263-284.9001.685.44166.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.

4、20119.222.62720.23622.80220.45526.32624.0263-384.9001.685.12566.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0264-086.3001.687.80866.30021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18

5、319.20119.222.62720.23622.80220.45526.32624.0264-186.3001.686.04166.30021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0264-285.8001.686.12066.30021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.1401

6、9.18319.20119.222.62720.23622.80220.45526.32624.0264-385.8001.685.83666.30021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0265-086.2001.687.866.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14

7、019.18319.20119.222.62720.23622.80220.45526.32624.0265-186.2001.686.00566.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0265-284.7001.685.84066.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.3051

8、9.14019.18319.20119.222.62720.23622.80220.45526.32624.0265-384.7001.685.88366.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0266-0.7001.6.90170.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.3051

9、9.14019.18319.20119.222.62720.23622.80220.45526.32624.0266-1.7001.6.970.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0266-285.7001.688.32765.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.

10、14019.18319.20119.222.62720.23622.80220.45526.32624.0266-385.7001.685.93665.70021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0267-091.1001.692.90270.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30

11、519.14019.18319.20119.222.62720.23622.80220.45526.32624.0267-191.1001.690.55570.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.30519.14019.18319.20119.222.62720.23622.80220.45526.32624.0267-288.1001.690.426.10021.87221.76320.03519.44119.34119.02521.50819.74119.82019.53621.119.

12、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=240

13、0m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1-21-3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。基坑開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

14、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。測量放出中心點(diǎn)使整個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接長度為1.6m焊前綁直按長、中、下三段單面焊每段焊長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。上下用對拉螺桿拉緊處

15、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振動棒插入快拔出慢振動范圍為0.5m嚴(yán)禁振動棒觸振模板施工時振搗器絕對不能觸碰模板及鋼筋否那么會影響砼的外表質(zhì)量最后工序?yàn)橥獗硎展?。預(yù)埋件的安裝為便于今后對樁基進(jìn)展沉降觀測在樁基內(nèi)側(cè)25cm處預(yù)埋20*60cm鋼筋兩根高出系梁外表1-1.5m。拆模澆筑24小時后拆模吊車、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

16、都要請監(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mm30外形尺寸mm0+30傾斜度05頂面高程mm10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要放緩邊坡作為排水措施。加強(qiáng)現(xiàn)場施工理施工現(xiàn)場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)動車通行不得危及坑壁的平安以防坍塌。施工現(xiàn)場電工須持證上崗。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)禁非駕駛員開車或試車嚴(yán)