【正文】 .. 26 豎向預(yù)應(yīng)力筋加工制作 .............................................................................. 27 預(yù)應(yīng)力筋穿束 ............................................................................................ 27 粗鋼筋張拉 ................................................................................................ 28 張拉質(zhì)量控制 ............................................................................................ 29 張拉注意事項(xiàng) ............................................................................................ 30 張拉作業(yè)安全注意事項(xiàng) .............................................................................. 31 3 連續(xù)梁、連續(xù)剛構(gòu)懸臂灌注施工工藝 ............................................................................ 31 連續(xù)梁盆式橡膠支座安裝 .................................................................................... 31 連續(xù)梁臨時(shí)支座的設(shè)置和拆除 ............................................................................. 32 支座的設(shè)置 ................................................................................................ 32 支座的拆除 ................................................................................................ 33 墩頂 0段施工工藝 .............................................................................................. 34 墩旁托架 ................................................................................................... 35 模板 .......................................................................................................... 36 灌筑箱梁混凝土 ......................................................................................... 37 懸臂灌筑梁段施工 ............................................................................................... 37 掛籃拼裝和拆除 ......................................................................................... 39 懸臂灌筑施工 ............................................................................................ 39 鋼筋加工 ................................................................................................... 41 梁體鋼筋綁扎 ............................................................................................ 41 預(yù)應(yīng)力管道的制作與安裝 ........................................................................... 41 梁段混凝土灌筑施工 .................................................................................. 41 邊跨現(xiàn)澆段施工 .................................................................................................. 42 4 箱形連續(xù)梁、連續(xù)剛構(gòu)體系轉(zhuǎn)換及合攏段施工工藝 ....................................................... 45 體系轉(zhuǎn)換技術(shù)特點(diǎn) ............................................................................................... 45 預(yù)應(yīng)力混凝土連續(xù)剛構(gòu)橋合攏段施工的力學(xué)分析 ................................................. 46 溫差產(chǎn)生的軸向力分析 .............................................................................. 46 平衡設(shè)計(jì) ................................................................................................... 48 合攏口的彎曲和剪力問題 ........................................................................... 48 合攏段施工所用的臨時(shí)鎖定結(jié)構(gòu) .......................................................................... 49 合攏段的臨時(shí)鎖定 ............................................................................................... 50 . 合攏段混凝土澆注時(shí)間地確定 ............................................................................ 50 合攏段施工的工藝流程 ........................................................................................ 50 合攏段施工及結(jié)構(gòu)體系的轉(zhuǎn)換 .................................................................... 51 邊跨合攏施工 ............................................................................................ 53 中跨合攏 ................................................................................................... 56 5 客運(yùn)專線箱形連續(xù)剛構(gòu)、連續(xù)梁施工控制技術(shù) .............................................................. 59 3 概述 .................................................................................................................... 59 懸臂施工預(yù)拱度的設(shè)置 ........................................................................................ 60 施工誤差的調(diào)整措施 ........................................................................................... 62 產(chǎn)生誤差的原因 ......................................................................................... 62 施工誤差調(diào)整的原則和措施 ........................................................................ 63 6 連續(xù)剛構(gòu)、連續(xù)梁質(zhì)量通病及常見病害的防治 .............................................................. 64 主要質(zhì)量通病 ...................................................................................................... 64 常見病害的預(yù)防 .................................................................................................. 65 確?？v向預(yù)應(yīng)力的有效性 ........................................................................... 65 保證豎向預(yù)應(yīng)力有效性 .............................................................................. 67 保證箱梁節(jié)段接縫質(zhì)量 .............................................................................. 69 第三章 耐久性混凝土 .............................................................................................................. 70 1 高性能混凝土基本概念 ................................................................................................. 70 2 客運(yùn)專線箱梁用高性能混凝土的設(shè)計(jì)方案 ..................................................................... 70 客運(yùn)專線箱梁混凝土的性能指標(biāo) .......................................................................... 70 提高客運(yùn)專線箱梁高性能混凝土耐久性的技術(shù)措施 .............................................. 70 改善混凝土密實(shí)度的措施 ........................................................................... 71 提高抗凍融循環(huán)破壞能力的措施 ................................................................ 71 對(duì)環(huán)境侵蝕性介質(zhì)采取的抗侵蝕措施 ......................................................... 72 提高抗碳化能力的措施 .......................................