【正文】 萍鄉(xiāng)至上栗（洪口界）高速公路一分部 橋梁樁基施工技術(shù)方案 中交第一公路工程局有限公司萍鄉(xiāng)至上栗（洪口界）高速公路一分部 項(xiàng)目經(jīng)理部 萍洪高速公路一分部項(xiàng)目經(jīng)理部 萍洪高速公路一分部橋梁樁基 施工技術(shù)方案 編制人： 復(fù)核人： 審批人： 中交一公局橋隧 工程有限公司 萍洪高速公路一分部項(xiàng)目經(jīng)理部 目 錄 一、編制原則和編制依據(jù) ....................................................................................... 1 編制原則 ......................................................................................................... 1 編制依據(jù) ......................................................................................................... 1 二、施工總體概況 ................................................................................................... 2 工程簡介 ......................................................................................................... 2 地形、地貌 ..................................................................................................... 3 水文氣象 ......................................................................................................... 3 管理機(jī)構(gòu) ......................................................................................................... 4 機(jī)械進(jìn)場情況和計(jì)劃安排 ............................................................................. 4 勞動力安排 ..................................................................................................... 5 原材料 ............................................................................................................. 5 三、沖孔樁施工技術(shù)方案 ....................................................................................... 6 測量放樁 ......................................................................................................... 6 護(hù)筒埋設(shè) ......................................................................................................... 6 造漿 ................................................................................................................. 7 沖擊成孔 ......................................................................................................... 8 鋼筋加工及安裝 ........................................................................................... 10 吊放導(dǎo)管 ........................................................................................................ 11 二次清孔 ....................................................................................................... 12 水下砼灌澆注 ............................................................................................... 12 鉆孔樁基施工注意事項(xiàng) ............................................................................. 13 1破除樁頭 ..................................................................................................... 14 1基樁檢測 ..................................................................................................... 14 1 施工工藝流程圖 ........................................................................................ 15 四、人工挖孔樁施工技術(shù)方案 ............................................................................. 16 放線、定樁位及高程 ................................................................................... 16 開挖第一節(jié)樁孔土方 ................................................................................... 16 孔口防護(hù) ....................................................................................................... 17 挖孔護(hù)壁 ....................................................................................................... 17 澆筑第一節(jié)護(hù)壁砼 ....................................................................................... 18 挖孔樁排水 ................................................................................................... 18 檢查樁位（中心）軸線、標(biāo)高 ................................................................... 19 架設(shè)垂直運(yùn)輸架 ........................................................................................... 19 安裝提升設(shè)備、吊桶、活動蓋板、水泵、通風(fēng)機(jī)等 ............................. 19 1開挖第二節(jié)樁 孔土方 ................................................................................. 19 1終孔檢查 ..................................................................................................... 19 1鋼筋加工 ..................................................................................................... 20 1樁基混凝土灌注 ......................................................................................... 21 1成 樁檢測 ..................................................................................................... 22 1特殊地層處理 ............................................................................................. 23 1人工挖孔樁注意事項(xiàng) ................................................................................. 23 五、人工挖孔爆破作業(yè)施工 ................................................................................. 25 準(zhǔn)備工作 ....................................................................................................... 25 裝藥 ............................................................................................................... 25 堵塞及引線連接 ........................................................................................... 25 爆破安全距離 ............................................................................................... 26 爆破操作 ....................................................................................................... 27 六、施工進(jìn)度計(jì)劃 ................................................................................................. 27 七、質(zhì)量保證體系及控制措施 ............................................................................. 28 １、質(zhì)量保證體系 ....