0深圳市城市轨道交通9号线BT工程9104-3标上跨下穿既有地铁线专项施工方案目录第一章编制依据........................................................................................................................................-1-1.1编制依据.................................................................................................................................................-1-1.2编制原则..................................................................................................................................................-2-1.3适用范围.................................................................................................................................................-2-第二章工程概述........................................................................................................................................-3-2.1工程概况.................................................................................................................................................-3-2.2工程地质.................................................................................................................................................-4-2.2.1地质概况.....................................................................................................................................-4-2.2.2岩层特性.....................................................................................................................................-6-2.3施工特点..................................................................................................................................................-7-2.4施工难点.................................................................................................................................................-9-第三章施工风险分析及对策............................................................................................................-10-3.1地层风险及对策................................................................................................................................-10-3.2设备风险及对策................................................................................................................................-10-3.3既有地铁线路、管线风险及对策..............................................................................................-10-第四章总体施工方案...........................................................................................................................-12-4.1总体施工方案概述...........................................................................................................................-12-4.1.1地层处理...................................................................................................................................-12-4.1.2盾构机检修..............................................................................................................................-12-4.1.3采用土压平衡均匀连续通过下穿区域........................................................................-13-4.1.4采用合理参数，严格控制施工过程.............................................................................-13-4.1.5加强注浆...................................................................................................................................-14-4.1.6测量监测.....
