【正文】 ..........57 3 施工方法及技術控制措施 ..............................................................................57 測量放線 ..................................................................................................57 控制點布置與保護 ...........................................................................57 樁位測放 ...........................................................................................58 測量放線的檢查、驗收與保護 .......................................................59 泥漿系統(tǒng)的布置與泥漿制備、處理、排放 ..........................................59 泥漿系統(tǒng)的組成與布置 ...................................................................59 泥漿制備 ...........................................................................................60 泥漿處理與排放 ...............................................................................61 護筒埋設 ...................................................................................................61 護筒埋設步驟 ....................................................................................62 護筒埋設的做法及注意事項 ............................................................62 成孔 .........................................................................................................63 6 施工組織設計 覆蓋層鉆進 ......................................................................................63 巖層鉆進 ..........................................................................................64 鉆進 .............................................................................................64 確定達到設計入巖深度 ............................................................65 成孔時應注意的問題 .......................................................................65 成孔質量驗收 ...................................................................................65 泥漿指標檢測 ............................................................................66 孔徑檢測 .....................................................................................66 鉆孔深度、沉渣厚度檢測 .........................................................66 清孔 ....................................................................................................67 鋼筋籠制作與運輸 ..................................................................................67 鋼筋驗收、堆放與標識 ...................................................................67 鋼筋驗收質量標準及檢驗項目 .......................................................67 鋼筋質量標準、檢驗項目和檢驗頻率 ....................................67 鋼筋取樣方法及取樣要求 .........................................................68 鋼筋籠制作工藝流程 .......................................................................68 鋼筋除銹與調直 ...............................................................................68 鋼筋焊接 ...........................................................................................69 主筋焊接 ....................................................................................69 加筋箍筋焊接 ............................................................................70 鋼筋焊接接頭的質量檢查 ........................................................70 檢驗項目 .............................................................................70 取樣要求 .............................................................................71 結果評定 .............................................................................71 鋼 筋籠成型 .......................................................................................72 鋼筋籠制作允許偏差 .......................................................................73 鋼筋籠的驗收與成品保護 ...............................................................73 7 施工組織設計 鋼筋籠運輸 .......................................................................................73 混凝土攪拌及運輸 ..................................................................................73 砼攪拌系統(tǒng)施工布置 .......................................................................73 砼攪拌站的選擇 ...............................................................................73 砼攪拌站的要求 ...............................................................................74 砼攪拌流程 .......................................................................................74 砼質量標準 .......................................................................................74 混凝土原材料質量檢驗 ...................................................................75 原材料質量標準、檢驗項目和檢驗頻率 ................................75 混凝土原材料取樣方法及取樣要求 ........................................76 散裝水泥 .............................................................................76 砂石料 .................................................................................76 外加劑 .................................................................................76 粉煤灰 .................................................................................76 攪拌要求 ...........................................................................................77 試塊制作 ...........................................................................................77 砼運輸 ................................................................................................78 水下混凝土灌注 .......................................................................................78 鋼筋籠吊放與定位 ............................................................................78 鋼筋籠的吊放 .............................................................................78 鋼筋籠孔口連接 .........................................................................79 鋼筋籠定位 .................................................................................79 下設導管 ............................................................................................80 二次清孔 ............................................................................................80 水下砼灌