【正文】 ............................................. 5 編制依據(jù) .......................................................................................... 5 編制原則 .......................................................................................... 5 2 工程概況 ............................................................................................... 6 工程概況及范圍 ............................................................................... 6 工程地質(zhì)情況 ................................................................................... 6 工程自然環(huán)境 ............................................................................ 6 工程地質(zhì)條件 ............................................................................ 8 水文地質(zhì) .................................................................................. 10 不良地質(zhì)作用 .......................................................................... 10 氣象條件 .................................................................................. 11 施工要求和技術(shù)保證條件 .............................................................. 11 施工平面布置圖 ............................................................................. 11 3 施工方案、工藝及方法 ........................................................................ 11 總體施工方案 ................................................................................. 11 施工重難點(diǎn) .................................................................................... 12 順利完成大盾構(gòu)始發(fā)意義重大 ................................................ 12 、安全通過(guò)下穿房屋掘進(jìn)施工是重點(diǎn) ....................................... 13 到達(dá)段軟弱地層段掘進(jìn)姿態(tài)控制是難點(diǎn) ................................. 14 始發(fā)端頭加固施工 ......................................................................... 15 端頭加固目的 .......................................................................... 15 端頭地層、水文情況 ................................................................ 15 端頭加固方式 ........................................................................... 15 土體加固效果檢查方案 ............................................................ 16 洞門鋼環(huán)預(yù)埋安裝施 工 ................................................................... 18 洞門預(yù)埋鋼環(huán)設(shè)計(jì) ................................................................... 18 洞門鋼環(huán)預(yù)埋安裝施工 ........................................................... 18 中鐵隧道集團(tuán)廣州市軌道交通四號(hào)線南延段施工 5 標(biāo)項(xiàng)目部 2 始發(fā)臺(tái)與反力架 定位、安裝及支撐 ..........................................19 始發(fā)軌線鋪設(shè) ..................................................................................22 軌線鋪設(shè)概述 ............................................................................22 始發(fā)軌線鋪設(shè)流程 ....................................................................23 始發(fā)軌線鋪設(shè) ............................................................................23 盾構(gòu)機(jī)組裝、調(diào)試 ...........................................................................24 洞門密封裝置安裝 ...........................................................................30 洞門密封裝置設(shè)計(jì) ....................................................................30 盾構(gòu)始發(fā)洞門密封裝置安裝流程 ..............................................30 負(fù)環(huán)管片安 裝及支撐加固 ................................................................31 負(fù)環(huán)管片安裝概述 ....................................................................31 負(fù)環(huán)管片運(yùn)輸及安裝工藝流程 ..................................................32 負(fù)環(huán)管片拼 裝 ............................................................................32 刀具配置 ..........................................................................................36 盾構(gòu)始發(fā)段穿越的地層 .............................................................36 刀具配置方案 ............................................................................36 泥漿調(diào)制及渣土處理 .....................................................................36 計(jì)算碴土量 ..............................................................................36 碴土棄排方案 ..........................................................................38 棄漿需要用地面積 ...................................................................40 盾構(gòu)始發(fā)前 60 環(huán)掘進(jìn) ....................................................................41 始發(fā)段掘進(jìn) ..............................................................................41 注漿 .........................................................................................42 始發(fā)段洞內(nèi)運(yùn)輸 ......................................................................43 掘進(jìn)姿態(tài)的控制 .............................................................................43 盾構(gòu)掘進(jìn)方向控制 ...................................................................43 盾構(gòu)掘進(jìn)姿態(tài)調(diào)整與糾偏 .......................................................45 方向控制 及糾偏注意事項(xiàng) .......................................................45 建立施工監(jiān)測(cè)制度 .........................................................................46 洞內(nèi)管片監(jiān)測(cè)制度 ...................................................................46 3 中鐵隧道集團(tuán)廣州市軌道交通四號(hào)線南延段施工 5 標(biāo)項(xiàng)目部 地表沉降監(jiān)測(cè)制度 .................................................................. 46 負(fù)環(huán)管片拆除 ............................................................................... 47 試掘進(jìn)段剩余 40 環(huán)掘進(jìn) ............................................................... 47 到達(dá)段盾構(gòu)掘進(jìn)施工 ..................................................................... 47 到達(dá)段施工流程 ...................................................................... 47 盾構(gòu)機(jī)定位及到達(dá)端洞口位置復(fù)核測(cè)量 ............................. 48 盾構(gòu)到達(dá)段掘進(jìn) .................................................................. 49 碴土清理及洞門臨時(shí)密封裝置安裝 ....................................... 49 接收基座安裝及盾構(gòu)機(jī)步上接收基座 ................................. 49 洞門圈封堵 ............................................................................ 50 盾構(gòu)到達(dá)施工注意事項(xiàng) ....................................................... 50 4 施工進(jìn)度計(jì)劃 .......................................................................................51 各工序的施工時(shí)間 ....................