【正文】 鄭州市南三環(huán)東延線（南臺(tái)路至 107 輔道）高壓輸電線路改造工程頂管穿越高速公路專項(xiàng)施工方案河 南 煤 炭 建 設(shè) 集 團(tuán)二〇一五年五月二日II / 42目 錄1 編制依據(jù)及原則 ...............................................................................................................................................1 編制依據(jù) .......................................................................................................................................................1 編制原則 ........................................................................................................................................................2工程概況 ........................................................................................................................................................3 整體概況 .............................................................................................................................................................3 一標(biāo)段施工概況 .................................................................................................................................................3 穿越段施工概況 .................................................................................................................................................4環(huán)境情況工程地質(zhì)概況及水文地質(zhì)概況 .......................................................................................................頂管主要穿越土性 ..........................................................................................................................................5 機(jī)場(chǎng)高速路概況 ................................................................................................................................................5主要難點(diǎn)分析及應(yīng)對(duì)措施 ..............................................................................................................................5 地表沉降及淺覆土頂進(jìn)分析及對(duì)策 ................................................................................................................5 地表沉降原因分析 .........................................................................................................................................5 減少地表沉降措施 ..........................................................................................................................................5為減少地表沉降首先必須調(diào)查清楚高速公路路基下有無加固土體的粉噴樁、碎石樁等，根據(jù)調(diào)查后的實(shí)際情況選定相應(yīng)的頂管掘進(jìn)機(jī)，進(jìn)行頂管施工。 ...............................................................................................5 開挖面的土壓力與出土量控制 .....................................................................................................................6 注漿壓力和注漿量控制 ................................................................................................................................6 頂管軸線糾偏控制 ........................................................................................................................................7 頂進(jìn)施工參數(shù)的控制 ....................................................................................................................................7 沉降監(jiān)測(cè) .........................................................................................................................................................7 做好置換泥漿工作 ........................................................................................................................................8 中繼間及管內(nèi)接縫密封性處理 ....................................................................................................................8 管材選用 ......................................................................................................................................................10 高速公路監(jiān)測(cè)措施 .....................................................................................................................................10 在穿越工程之前必須做好前程檢測(cè)工作 ......................................................................................................10 監(jiān)測(cè)方法 ..........................................................................................................................................................10 高程控制網(wǎng)測(cè)量 ............................................................................................................................................11 監(jiān)測(cè)點(diǎn)垂直位移測(cè)定 ....................................................................................................................................11 監(jiān)測(cè)點(diǎn)布設(shè) ....................................................................................................................................................11 監(jiān)測(cè)頻率 .......................................................................................................................................................11 監(jiān)測(cè)初始值測(cè)定 .........................................................................................................................................1施工監(jiān)測(cè)頻率 ..........................................................................................................................................11 監(jiān)測(cè)實(shí)施 .....................................................................................................................................................13 施工監(jiān)測(cè)預(yù)警 .............................................................................................................................................13 監(jiān)測(cè)資料整理、提交流程 .........................................................................................................................13 監(jiān)測(cè)工作的管理 .........................................................................................................................................14III / 42 保證監(jiān)測(cè)質(zhì)量的措施 .................................................................................................................................156 、主要施工方案 .............................................................................................................................................15. 深基坑開挖 .....................................................................................................................................................157 、施工