【正文】 寧波軌道交通 2號(hào)線一期工程 TJ2111 標(biāo)項(xiàng)目經(jīng)理部旋挖鉆施工方案 寧波軌道交通 2 號(hào)線一期工程 TJ21111 標(biāo)項(xiàng)目經(jīng)理部 第 1 頁 共 28 頁 寧波軌道交通 2 號(hào)線一期工程 TJ2111 標(biāo)合同段 沖擊 鉆施工 方案 編 制： 審 核： 批 準(zhǔn)： 時(shí) 間： 寧波市軌道交通 2 號(hào)線一期工程 TJ2111 標(biāo)項(xiàng)目經(jīng)理部 寧波軌道交通 2號(hào)線一期工程 TJ2111 標(biāo)項(xiàng)目經(jīng)理部旋挖鉆施工方案 寧波軌道交通 2 號(hào)線一期工程 TJ21111 標(biāo)項(xiàng)目經(jīng)理部 第 2 頁 共 28 頁 目 錄 一、總則 .................................................................................................................... 4 編制目的 ...................................................................................................... 4 編制依據(jù) ...................................................................................................... 4 編制原則 ...................................................................................................... 5 二、工程概況 ............................................................................................................ 5 工程簡(jiǎn)介 ...................................................................................................... 5 地質(zhì)概況 ...................................................................................................... 5 氣象條件 ...................................................................................................... 6 參建單位 .................................................................................................... 6 三、沖擊鉆施工方案 ................................................................................................ 7 沖擊鉆工藝流程 .......................................................................................... 7 施工準(zhǔn)備 ...................................................................................................... 8 技術(shù)準(zhǔn)備 ............................................................................................... 8 機(jī)械設(shè)備準(zhǔn)備 ....................................................................................... 8 測(cè)量準(zhǔn)備 ............................................................................................... 9 試驗(yàn)準(zhǔn)備 ............................................................................................... 9 物質(zhì)材 料準(zhǔn)備 ....................................................................................... 9 施工場(chǎng)地布置 ....................................................................................... 9 測(cè)量放樣 ............................................................................................... 9 鋼護(hù)筒制作及埋設(shè) ............................................................................... 9 鉆機(jī)就位 ............................................................................................... 9 鉆進(jìn)成孔 .................................................................................................... 10 泥漿制備 ............................................................................................. 10 鉆進(jìn) ..................................................................................................... 11 地質(zhì)情況記錄 ..................................................................................... 11 終孔 ..................................................................................................... 12 清空及檢測(cè) ......................................................................................... 12 鉆進(jìn)過程中孔內(nèi)事故的預(yù)防及處理 ........................................................ 12 卡埋鉆具 ............................................................................................. 12 鋼筋籠制作、運(yùn)輸及安裝 ........................................................................ 13 鋼筋籠制作 ......................................................................................... 13 鋼筋籠的運(yùn)輸及安裝 ......................................................................... 14 導(dǎo)管下放 .................................................................................................... 15 導(dǎo)管選擇 ............................................................................................. 15 導(dǎo)管水密性試驗(yàn) ................................................................................. 15 導(dǎo)管安裝 ............................................................................................. 16 二次清孔 .................................................................................................... 16 水下混凝土灌注 ........................................................................................ 16 寧波軌道交通 2號(hào)線一期工程 TJ2111 標(biāo)項(xiàng)目經(jīng)理部旋挖鉆施工方案 寧波軌道交通 2 號(hào)線一期工程 TJ21111 標(biāo)項(xiàng)目經(jīng)理部 第 3 頁 共 28 頁 水下混凝土澆注設(shè)備 ......................................................................... 16 首批混凝土數(shù)量 ................................................................................. 16 水下混凝土灌注 ................................................................................. 17 樁基砼灌注應(yīng)注意的問題 ................................................................. 18 四、斷樁處理預(yù)案 .................................................................................................. 19 斷樁原因 .................................................................................................... 19 預(yù)防措施 .................................................................................................... 20 處理斷樁的幾種方法 ................................................................................ 21 五、施工保證措施 ..............