涵洞施工技术交底样本框架涵施工技术交底单位名称:中铁四局二公司昌九第三项目队 2021年 03月 9 日工程名称 里程桩号 DK31+255 设计文件图号 施工部位 基础 技术交底内容 : 框架涵施工（ 1）基础施工对于有地基加固处理的涵洞，应先进行地基加固处理施工，而后进行基坑开挖 土质基坑一般采用挖掘机开挖，辅以人工清基。涵洞基坑开挖后，报请监理工程师 以触探仪对基底承载力进行检测，检测合格后立即进行垫层砼施工，待垫层砼达到 允许强度值后支立基础组合钢模，浇筑基础混凝土。基坑开挖时，做好截、排水设施 （ 基坑外设挡水埂，坑内设环形排水沟、集水 井，随时抽排坑中积水），防止基坑遭水浸泡、地基条件恶化 .（2） 框架箱身施工框架涵采用原位分节现浇。框架涵身分两次浇筑成型 :第 1次浇筑底板及下梗 肋以上墙身，第 2 次浇筑侧墙及顶板。框架模板，内外模采用组合钢模板；框架内采用满堂钢管支架，并按规定设置 剪刀撑和扫地杆等 .为保证混凝土面美观，交通涵框架墙身采用无内拉杆模板施工 （ 内模利用满堂 支架向两侧顶紧 ,外模采用双联槽钢竖向加固 ） 。钢筋在棚内集中弯制 , 运至现场绑扎成型 .混凝土由邻近拌和站集中供应 , 搅拌车运输，泵送或吊机提吊浇筑。浇筑底板 前，对基础顶面进行凿毛并冲洗干净。为加强两次浇筑的连接和保证框架整体防水性能，水平施工缝做成“凹”字形，即在第 1 次浇筑时将厚度为边墙厚度 1/3 的方木埋入混凝土中，待混凝土终凝 后取出，且在方木取出前将施工缝凿毛、冲洗干净。attention to improving the quality and efficiency of development and pay more attention to security and reform the peoples livelihood, morefocus on maintaining social harmony and stability， and promote thedevelopment of township economy in a better and faster, create a new normal XX development and lay a more solid foundation for XX build a well off society 。 Completed tasks this year, we must always pay special attention to the primary task of development. XX weak economic base, low levels of development, economic construction is the Center, we have to create conditions for faster economic development, accumulating more wealth, better peoples lives. Effort should be made to this year s economic growth, revenue growth, people have maintained a high rate of income growth ， GDP growth of more than 15 per cent respectively. Always grasp the fundamental impetus for reform。 We are now nosoldiers behind many indicators ranked in the bottom of the county from getting bigger. Only by going all out to hard work, hard work，innovation, reform does not adapt to institutional mechanisms, practices ， it is possible to change the face of XX poor， into a well-off society together with people across the country. We want to break the old patterns of thinking, methods and organization of work ， bravely and boldly into ， making full use of all the advantages， comprehensivelet fullreforms ， to make all its vitality for development impulse play to all sources of wealth creation 。 Should always stability 底板混凝土达到设计强度的 50%后，方可搭设支架、立模、绑扎钢筋、浇筑边 墙及顶板混凝土。混凝土分层浇筑，层厚以30cm为宜。混凝土浇筑时，两边侧墙对称均衡进行， 侧墙混凝土通过小直径导管或串筒浇筑，插入式振动器振实，底板、顶板混凝土采 用插入式和平板式振动器振实。混凝土振捣过程中 , 防止漏捣或过捣 .当顶板混凝土强度达到设计强度后 , 方可拆除模板及支撑，进行变形缝、防水 层及附属工程施工。(3)翼墙施工现浇翼墙内模、外模采用竹胶板、方木和钢管加固 , 基础施工时，按规范预埋 接茬钢筋，基础与墙身接触面进行凿毛并清洗干净。因外墙面为非竖直面，应加强 模板及其支撑系统的刚度、外模板采用地锚与基础连接以加强抗浮能力 , 采用坍落 度较小的混凝土浇筑，砼浇筑速度不宜过快 , 以免模板爬升和出现墙面“鼓肚 现象 而影响外观 .(4 )防水层等施工防水层施工前，将涵身上的尖凸处打磨平整 , 将泥土、杂物等清除干净 , 保持涵 身表面干燥，以保证防水材料与涵身的粘结。涵身两侧分层对称回填压实，具体见“过渡段施工”交底。 锥坡砌体采用挤浆法砌筑 , 架立样架或靠尺控制圆顺度和平整度。 attention to improving the quality and efficiency of development and pay more attention to security and reform the peoples livelihood, morefocus on maintaining social harmony and stability， and promote thecreate a newdevelopment of township economy in a better and fasternormal XX development and lay a more solid foundation for XX build a well off society 。 Completed tasks this year, we must always pay special attention to the primary task of development 。 XX weak economic base， low levels of development, economic construction is the Center, we have to create conditions for faster economic development，accumulating more wealth, better peoples lives。 Effort should be madeto this year s economic growth ， revenue growth ， people have maintained a high rate of income growth， GDP growth of more than 15 percent respectively. Always grasp the fundamental impetus for reform。 Weare now ”no soldiers behind ” many indicators ranked in the bottom ofthe county from getting bigger. Only by going all out to hard work，hard work, innovation ， reform does not adapt to institutional mechanisms， practices ， it is possible to change the face of XX poor，into a well-off society together with people across the country。 Wewant to break the old patterns of thinking, methods and organization of work, bravely and boldly into， making full use of all the advantages,comprehensive reforms ， to make all its vitality for development impulse ， let full play to all sources of wealth creation. Should always stability施工工艺 :框架涵施工工艺框图放线定位基坑开挖自检后报工程师检查浇筑基础、垫层砼试件制作钢筋制作底板钢筋绑扎底板立模 自检后报工程师检查 浇筑底板砼试件制作钢筋制作墙身及顶板钢筋绑扎、立模 自检后报工程师检查 浇筑墙身、顶板混凝土试件制作翼墙施工自检后报工程师审批强度检测attention to improving the quality and efficiency of development and pay more attention to security and reform the peoples livelihood, more focus on maintaining social harmony and stability, and promote the development of township economy in a better and faster, create a new normal XX development and lay a more solid foundation for XX build a well off society 。 Completed tasks this year, we must always pay special attention to the primary task of development。 XX weak economicbase, low levels of development， economic construction is the Center,we have to c