【正文】 ........................................................................................................................................6 ..............................................................................................................................................6 .........................................................................................................................7 ......................................................................................................................................7 四、危險源識別及降級處置措施 .......................................................................................................7 ..........................................................................................................................................7 .........................................................................................................................8 巖溶降級處置措施 ..........................................................................................................................8 高地應(yīng)力處置措施 ..........................................................................................................................8 突涌水段處置措施 ..........................................................................................................................9 爆破作業(yè)高風(fēng)險降級處置措施 .....................................................................................................9 一般風(fēng)險降級處理處置措施 .........................................................................................................9 五、施 工方案 .........................................................................................................................................9 ......................................................................................................................................9 .............................................................................................................................. 10 施工工藝流程圖 ........................................................................................................................... 10 施工方法 ........................................................................................................................................ 12 超前管棚 ........................................................................................................................................ 12 ....................................................................................................................................... 13 開挖 ........................................................................................................................................... 15 Ⅴ級圍巖段 ................................................................................................................................... 15 IV級圍巖段 .................................................................................................................................. 17 Ⅲ級圍巖段 ................................................................................................................................... 18 鉆爆設(shè)計 ....................................................................................................................................... 19 鉆爆作業(yè)技術(shù)要求 ...................................................................................................................... 27 ........................................................................................................................................... 30 濕噴砼施工 ................................................................................................................................... 30 錨桿、掛網(wǎng)施工 .......................................................................................................................... 30 中國路橋集團(tuán)西安實業(yè)發(fā)展有限公司畢都高速平?jīng)_埡口 隧道施工安全專項方案 3 / 62 構(gòu)件支撐 ....................................................................................................................................... 31 ........................................................................................................................................... 32 工藝流程 ........................................................................................................................................ 32 仰拱施工 ........................................................................................................................................ 33 拱墻施工 ........................................................................................................................................ 34 ................................................................................................................................... 38 洞內(nèi)路面 ........................................................................................................................................ 38 緊急停車帶 ......................................................................................................錯誤 !未定義書簽。 行車、行人橫洞 ........................................................................................................................... 39 預(yù)留洞室 ........................................................................................................................................ 39 預(yù)埋 (預(yù)留 )管件 ............................................................................................................................. 39 沉降縫、施工縫和伸縮縫 ........................................................................................................... 39 洞內(nèi)裝飾 ........................................................................................................................................ 39 防水與排水 .................................................................................................................................... 39 隧道通風(fēng) .....