佳县隧道施工评审后.doc

中交股份榆佳高速公路项目总承包经理部第三分部 佳县隧道施工方案1目录佳县隧道施工方案 ............................................................................................................................31 工程概况 .........................................................................................................................................31.1 工程简介 .............................................................................................................................31.2 工程地质及水文条件 .........................................................................................................31.2.1 地形地貌 .........................................................................................................................31.2.2 气象水文 .........................................................................................................................41.2.3 地层特性 .........................................................................................................................41.3 隧道洞室围岩级别划分及衬砌结构设计参数 .................................................................51.4 佳县隧道施工重点及难点分析 .........................................................................................62 隧道进洞方案 .................................................................................................................................62.1 明洞开挖 .............................................................................................................................62.2 超前大管棚施工 .................................................................................................................73 洞身开挖 .........................................................................................................................................83.1 隧道分段爆破施工方案 ...................................................................................................113.2 下穿段施工具体对策 .......................................................................................................123.3 减震爆破 ...........................................................................................................................133.3.1 减震爆破参数 .......................................................................................................143.3.2 钻爆设计 ......................................................................................................................153.4 穿越建筑物段备用施工方案及其对比 ...........................................................................153.5 仰拱开挖 ...........................................................................................................................173.6 洞身开挖弃渣方案 ...........................................................................................................184 初期支护总体方案 .......................................................................................................................184.1 超前注浆小导管支护施工方法 .......................................................................................194.2 超前锚杆初期支护方法 ...................................................................................................204.3 工字钢拱架施工 ...............................................................................................................214.4 药卷锚杆 ...........................................................................................................................214.5 钢筋网施工 .......................................................................................................................224.6 喷射砼支护施工 ...............................................................................................................224.7 通风排烟 ...........................................................................................................................254.7.1 通风总体方案 .......................................................................................................264.7.2 采用湿式凿岩、水幕降尘相结合的办法防尘 ...................................................264.7.3 机械设备净化 .......................................................................................................275 隧道防排水施工 ...........................................................................................................................285.1 初期支护防水 ...................................................................................................................285.2 二衬防水 ...........................................................................................................................285.2.1 防水板施工 ...........................................................................................................285.2.2 二衬接缝防水 .......................................................................................................295.2.3 路面边沟排水 .......................................................................................................306 隧道砼二次衬砌施工 ...................................................................................................................317 隧道监控量测 ..................................................................................................。