目录1编制说明.......................................................................................................................................................42、工程概况....................................................................................................................................................43、工程地质、水文现场环境........................................................................................................................53.3.1下穿隧道基坑四周管线情况.......................................................................................................63.3.21号人行通道基坑四周管线情况...............................................................................................63.3.32号人行通道基坑四周管线情况...............................................................................................64、设计情况....................................................................................................................................................74.1.1下穿隧道设计概况.......................................................................................................................74.2.21号人行通道设计概况.............................................................................................................84.2.32号人行通道设计概况.............................................................................................................84.2.1.围护桩计算.................................................................................................................................94.2.2计算结果及分析...........................................................................................................................95、围护结构施工..........................................................................................................................................125.1钻孔桩施工..........................................................................................................................................125.1.1、钻孔桩施工方法.......................................................................................................................125.1.2钻孔桩工艺流程...........................................................................................................................125.1.3、施工工艺...................................................................................................................................135.2、水泥搅拌桩方法及工艺流程...........................................................................................................165.2.1水泥搅拌桩施工方法...................................................................................................................165.2.2水泥搅拌桩工艺流程...................................................................................................................165.2.3水泥搅拌桩施工工艺...................................................................................................................165.3、拉森IV型钢板桩施工.....................................................................................................................175.3.1施工方法.......................................................................................................................................175.3.2工艺流程..........
