目录中导洞开挖施工方案..........................................................................................................................................................2一、工程概况..............................................................................................................................................................2二、机械设备及人员安排..........................................................................................................................................2三、施工计划安排......................................................................................................................................................3四、主要施工方法......................................................................................................................................................4五、质量保证体系及措施..........................................................................................................................................6六、工期保证措施....................................................................................................................................................16七、环保措施及保证体系........................................................................................................................................19八、安全管理技术措施............................................................................................................................................211出口进尺计划下载后可任意编辑中导洞开挖施工方案一、工程概况1、彭家隧道设计为双连拱隧道,进口里程 K29+950,出口里程为 K30+380,隧道全长 430m,线路纵坡-1.8%,隧道最大埋深 85m,洞净高 5m,洞净宽 10.25m。隧道开挖区岩性:场地出露的地层有第四系全新残破坡积层粉质泥层,下伏基岩为元古界双桥山群混合岩花岗岩。隧道位于扬子准地台西南部,构造面貌复杂,褶皱、断裂构造颇为发育,地层褶曲明显。隧道渗水以第四系松散岩类空隙潜水及基岩裂隙水。2、中导洞开挖主要工程数量:喷射 C25 砼 766.4 m3,钢拱架支撑 67.5T,砂...