【正文】 .......................... 24 設計要求 ............................................................................................................................... 24 成井施工 ............................................................................................................................... 25 封井方案 ................................................................................................................................ 28 6. 封井原則 ...................................................................................................................... 28 6. 封井方案 ...................................................................................................................... 28 七 基坑開挖及支撐 .............................................................................................................................. 30 基坑開挖 .................................................................................................................................. 30 支撐體系 ................................................................................................................................ 32 施工準備 ..................................................................................................................... 32 鋼支撐安裝 .................................................................................................................. 32 支撐拆除： .................................................................................................................. 34 八 內部結構 ......................................................................................................................................... 35 順作法內部結構施工流程 ...................................................................................................... 35 底板施工 ................................................................................................................... 35 2 側墻施工 ................................................................................................................... 35 中板施工 ................................................................................................................... 36 頂板施工 ................................................................................................................... 36 施工縫及誘導縫防水措施 ........................................................................................... 37 結構底板抗浮措施 ..................................................................................................... 37 頂板防水施工 ............................................................................................................ 38 回填土施工 ................................................................................................................ 38 逆作法重難點 ........................................................................................................................ 38 每層板澆筑后的穩(wěn)定性保證措施 ................................................................................ 38 側墻澆筑質量保證措施 .............................................................................................. 38 板底縱向水平施工縫防水措施 .................................................................................... 39 九 綜合接地 ......................................................................................................................................... 40 施工方法及工藝要求 .............................................................................................................. 40 十 施工監(jiān)測 ......................................................................................................................................... 42 監(jiān)測主要內容 ...................................................................................................................... 42 監(jiān)測目的 ................................................................................................................. 42 監(jiān)測重點 ................................................................................................................. 42 監(jiān)測內容 ................................................................................................................. 42 測點布設 ............................................................................................................................. 42 圍護（墻）體測 斜孔布設 ......................................................................................... 42 圍護（墻）體頂部沉降、位移測點布設 ...................................................................