杭州地铁1号线工程滨江站～富春路站区间（1，2号盾构）隧道工程穿越钱塘江段施工技术方案目录目录....................................................................11、工程概况...............................................................11.1工程简介.............................................................11.2区间隧道过江段工程地质...............................................11.2.1隧道穿越地层.....................................................11.2.2隧道断面内圆砾层分布情况.........................................51.3有害气体（沼气）分布情况............................................101.3.1原区间内沼气情况的描述..........................................101.3.2最新区间内沼气情况的描述........................................102、过江段隧道掘进施工主要施工风险........................................122.1盾构穿越段富含沼气..................................................122.2圆砾层隧道掘进施工..................................................122.3承压水段............................................................123、盾构机针对性设计......................................................12盾构机主图.............................................................133.1刀盘和刀具..........................................................133.2盾尾密封............................................................153.3螺旋机..............................................................153.4加泥加水口..........................................................163.5应急注浆孔的设置....................................................163.6同步注浆系统........................................................173.7有毒有害气体监测装置................................................174、前期准备工作..........................................................174.1沼气释放试验........................................................174.2掘进段施工试验......................................................194.2.1渣土改良........................................................194.2.2隧道通风........................................................194.2.3沼气浓度的控制..................................................204.3管片制作............................................................21杭州地铁1号线工程滨江站～富春路站区间项目管理部第1页杭州地铁1号线工程滨江站～富春路站区间（1，2号盾构）隧道工程穿越钱塘江段施工技术方案5、沼气段穿越施工技术....................................................215.1沼气释放............................................................215.2施工监测............................................................225.2.1监测标准........................................................225.2.2监测设备........................................................225.2.3监测要求........................................................225.3隧道通风............................................................235.5人员培训............................................................235.6掘进施工要点........................................................236、圆砾层段施工技术措施..................................................246.1沼气预防措施........................................................2562承压水预防措施.......................................................256.3掘进施工技术措施....................................................257、承压水段施工技术措施..............................
