高铁桥梁分项工程技术交底

学海无涯苦作舟！ 目目录录 一、一、 钻孔桩施工技术交底钻孔桩施工技术交底· ·· ·· ·· ·· ·· ·· ·· ·· · 4 4 （一） 钻孔灌注桩施工工艺流程········································· 4 1. 施工准备 ····························································· 4 2. 钻进施工 ····························································· 7 3. 冲击钻成孔 ·························································· 7 4. 施挖钻孔灌注桩 ·················································· 13 5. 清孔 ································································· 17 6. 安放钢筋笼并灌注混凝土 ······································ 17 （二） 桩基的质量检验····················································19 （三） 水中平台及双壁围堰的施工·····································19 （四） 双壁钢围堰的设计·················································19 1. 尺寸的拟定 ························································ 19 2. 结构计算 ··························································· 20 3. 钢围堰的制作 ····················································· 20 4. 平台的形成及钢围堰的运输、安装及下沉 ················· 20 二、二、 墩身施工技术交底墩身施工技术交底· ·· ·· ·· ·· ·· ·· ·· ·· ·· · 22 22 （一） 桥墩台施工技术交底··············································22 1. 钢筋施工 ··························································· 22 2. 模板工程 ··························································· 25 3. 混凝土浇筑 ························································ 26 4. 混凝土养护 ························································ 26 （二） 施工工艺质量标准·················································27 1. 模板及支架 ························································ 27 2. 钢筋 ································································· 28 3. 混 凝 土 ··························································· 28 4. 支承垫石 ··························································· 29 学海无涯苦作舟！ 三、三、 综合接地施工技术交底综合接地施工技术交底· ·· ·· ·· · 29 29 （一） 墩台接地体：·······················································29 （二） 施工工艺及注意事项··············································29 四、四、 承台施工技术交底承台施工技术交底· ·· ·· ·· ·· ·· ·· ·· ·· ·· · 31 31 （一） 开挖前准备工作····················································31 1. 开挖要求 ··························································· 31 2. 破桩头及基底处理 ··············································· 31 （二） 钢筋施工·····························································31 1. 钢筋连接 ··························································· 32 2. 钢筋安装 ··························································· 34 （三） 模板工程·····························································35 1. 模板安装 ··························································· 35 2. 模板拆除 ··························································· 36 （四） 混凝土浇筑··························································37 1. 浇筑前准备工作 ·················································· 37 2. 混凝土浇筑及振捣 ··············································· 38 3. 大体积混凝土施工温控措施 ··································· 39 4. 混凝土养护措施 ·················································· 41 （五） 基坑回填·····························································41 （六） 施工工艺质量标准···