京滬高速鐵路橋梁施工技術(shù)培訓(xùn)講稿(編輯修改稿)

　

【文章內(nèi)容簡(jiǎn)介】 ................................... 75 現(xiàn)代混凝土配合比 “全計(jì)算法 ” ..................................................................... 76 3 混凝土澆筑施工技術(shù) ..................................................................................................... 76 混凝土配置拌和前的準(zhǔn)備 .................................................................................... 76 混凝土拌制 ......................................................................................................... 77 混凝土的運(yùn)輸及泵送 ........................................................................................... 77 混凝土澆筑 ......................................................................................................... 78 澆筑順序 ................................................................................................... 78 澆筑及振搗方法 ......................................................................................... 79 橋面振動(dòng)整平與收漿方法 ........................................................................... 82 振搗時(shí)間對(duì)混凝土性能的影響 .................................................................... 83 混凝土耐久性的檢驗(yàn) ........................................................................................... 84 坍落度 ....................................................................................................... 84 含氣量 ....................................................................................................... 84 混凝土入模溫度 ......................................................................................... 84 試件 .......................................................................................................... 84 4 梁體混凝土養(yǎng)護(hù) ............................................................................................................ 85 灑水自然養(yǎng)護(hù) ...................................................................................................... 85 噴涂養(yǎng)護(hù)劑養(yǎng)護(hù) .................................................................................................. 86 4 帶模覆蓋養(yǎng)護(hù) ...................................................................................................... 86 蒸汽養(yǎng)護(hù) ............................................................................................................. 86 5 大體積復(fù)雜結(jié)構(gòu)混凝土養(yǎng)護(hù)溫度控制 ............................................................................ 87 6 高性能混凝土的裂紋防治方法 ....................................................................................... 87 混凝土裂紋的成因 ............................................................................................... 87 混凝土收縮引起的裂紋 .............................................................................. 88 溫度變化引起的裂紋 .................................................................................. 89 掛籃變形引起的裂紋 .................................................................................. 89 裂紋防治技術(shù)措施 ............................................................................................... 90 梁體混凝土收縮的防治措施 ....................................................................... 90 梁體溫度裂紋的防治措施 ........................................................................... 91 橋面防水保護(hù)層混凝土裂紋的防治措施 ...................................................... 92 第四章 橋梁施工的技術(shù)管理 ................................................................................................... 93 1 施工方案制定需要注意的幾個(gè)問(wèn)題 ................................................................................ 93 施工調(diào)查 .............................................................................................................. 93 水文 ........................................................................................................... 93 地質(zhì) ........................................................................................................... 94 氣象 ........................................................................................................... 94 其它 ........................................................................................................... 94 方案制定需要考慮的幾個(gè)因素 .............................................................................. 94 要考慮項(xiàng)目管理人員的閱歷、施工隊(duì)伍的素質(zhì)、類似工程的施工經(jīng)驗(yàn) ......... 94 要考慮業(yè)主的強(qiáng)制性要求，設(shè)計(jì)、規(guī)范以及當(dāng)?shù)卣挠嘘P(guān)規(guī)定 ................ 95 要充分利用當(dāng)?shù)氐脑O(shè)備資源，掌握購(gòu)置設(shè)備的遠(yuǎn)期使 用情況 ....................... 95 擴(kuò)大周轉(zhuǎn)材料的使用范圍，發(fā)揮好周轉(zhuǎn)材料的潛能 ..................................... 95 注重技術(shù)的細(xì)節(jié)工藝，以方案定方向，以細(xì)節(jié)保方案 ................................. 96 注重資料積累，加強(qiáng)技術(shù)借鑒，加大創(chuàng)新力度，力爭(zhēng)方案最佳 ................... 96 2 技術(shù)管理需要注意的幾個(gè)問(wèn)題 ....................................................................................... 97 堅(jiān)持動(dòng)態(tài)方案優(yōu)化，保證方案實(shí)施的連續(xù)性 ......................................................... 97 堅(jiān)持技術(shù)交底制度，全員掌握方案意圖 ............................................................... 97 堅(jiān)持定期會(huì)議制度，保證技術(shù)管理的順暢 ............................................................. 97 營(yíng)造和諧的工作環(huán)境，提高技術(shù)人員的落實(shí)能 力 .................................................. 98 抓好資料積累，做好變更設(shè)計(jì) .............................................................................. 98 3 施工管理需要注意的幾個(gè)問(wèn)題 ....................................................................................... 99 抓住主要矛 盾，動(dòng)態(tài)組織管理 .............................................................................. 99 立足自我，提高獨(dú)立解決問(wèn)題的能力 .................................................................... 99 遵循互利原則，做好施工服務(wù) ............................................................................ 100 超前運(yùn)作，做好物資設(shè)備保障工作 ..................................................................... 100 加強(qiáng)溝通，營(yíng)造寬松的社會(huì)環(huán)境 ......................................................................... 101 加強(qiáng)質(zhì)量監(jiān)控，規(guī)避質(zhì)量風(fēng)險(xiǎn)。 ......................................................................... 101 規(guī)范作業(yè)、杜絕安全事故的發(fā)生 ........................................