【正文】 ................................................................................. 10 貝雷架的加固 .............................................................................. 10 模板安裝 ............................................................................................ 10 四、模板及支架預(yù)壓 .................................................................................. 11 預(yù)壓目的 .............................................................................................11 方法概述 .............................................................................................11 預(yù)壓前的檢查 .................................................................................... 12 哈爾巴嶺 特大橋簡支箱梁鋼管立柱單層貝雷梁支撐現(xiàn)澆專項施 工技術(shù)方案 II 沉降觀測點的設(shè)置 ............................................................................. 12 沉降觀測 ............................................................................................ 13 加載方案及加載程序 ......................................................................... 14 五、 鋼筋工程 .............................................................................................. 16 鋼筋加工、綁扎安裝 ......................................................................... 16 鋼筋的驗收 ........................................................................................ 16 各種預(yù)埋件、預(yù)留孔洞 ..................................................................... 17 伸縮縫預(yù)埋件 ............................................................................. 17 擋碴墻、電纜碴、遮板預(yù)埋筋 .................................................... 18 接觸網(wǎng)下錨支柱預(yù)埋件 ............................................................... 18 預(yù)留孔施工 ........................................................................................ 18 六、梁體砼施工 .......................................................................................... 19 砼的泵送 ........................................................................................... 19 砼的灌注 ........................................................................................... 19 梁體砼的養(yǎng)護(hù)及拆模 ......................................................................... 21 七、預(yù)應(yīng)力施工 .......................................................................................... 21 技術(shù)要求 ........................................................................................... 21 預(yù)應(yīng)力材料的保護(hù)： ......................................................................... 22 張拉準(zhǔn)備條件 .................................................................................... 23 施工工藝 ............................................................................................ 23 后張梁穿束張拉 .......................................................................... 23 哈爾巴嶺 特大橋簡支箱梁鋼管立柱單層貝雷梁支撐現(xiàn)澆專項施 工技術(shù)方案 III 穿束 ............................................................................................. 24 后張法箱梁操作工藝 ................................................................... 24 張拉操作順序： .......................................................................... 25 預(yù)應(yīng)力施工質(zhì)量控制要點 .......................................................... 25 張拉安全要求 ............................................................................. 27 管道壓漿工藝 .................................................................................... 27 技術(shù)要求 .................................................................................... 27 施工工藝 .................................................................................... 28 管道壓漿質(zhì)量控制要點 ............................................................... 31 預(yù)應(yīng)力筋封端工藝 ............................................................................ 31 八、質(zhì)量、安全保證措施 ........................................................................... 32 質(zhì)量保證措施 .................................................................................. 32 質(zhì)量保證組織機(jī)構(gòu) ..................................................................... 32 質(zhì)量管理制度 .............................................................................. 32 圖紙審核制度 ...................................................................... 32 技術(shù)交底制度 ....................