改建铁路广通至大理线扩能改造工程路堑开挖施工方案编制:审核:批准:中铁XX局集团广大铁路项目部二〇一三年一月十八日目录1.编制说明..........................................................11.1编制依据..................................................11.2编制原则..................................................12.工程概况..........................................................12.1概况......................................................12.2技术标准..................................................13.施工准备..........................................................24.总体施工方案......................................................35.施工方法..........................................................45.1土质路堑开挖..............................................45.1.1开挖方法...............................................45.1.2土方挖方施工程序.......................................45.1.3土方及软石和强风化岩石路堑开挖施工作业要点.............55.2石质路堑爆破开挖..........................................75.2.1施工程序...............................................75.2.2路堑爆破作业..........................................85.3施工安全及环境保护.......................................116.边坡防护.........................................................116.1人字型骨架护坡...........................................116.2锚杆框架梁...............................................126.2.1施工准备..............................................126.2.2搭设脚手架............................................136.2.3锚杆钻孔..............................................146.2.4清孔、验孔............................................156.2.5插入锚杆..............................................166.2.6锚杆孔灌注水泥砂浆....................................176.2.7锚杆拉拔试验..........................................186.2.8开挖框架梁基础........................................186.2.9钢筋制作安装..........................................186.2.10模型安装及加固.......................................196.2.11浇注混凝土...........................................196.2.12养护.................................................196.2.13拆除脚手架...........................................196.2.14锚杆框架梁施工注意事项...............................206.3刚性防护网...............................................216.3.1施工准备.............................................216.3.2施工.................................................216.4微型桩...................................................236.4.1施工工艺：（工艺流程）................................236.4.2微型桩施工质量控制措施................................256.4.3微型桩安全控制措施....................................266.5路堑挡土墙施工...........................................266.5.1技术要求..............................................266.5.2施工顺序..............................................276.5.3施工注意事项..........................................287.路基开挖施工技术措施.............................................288.工程质量保证措施.................................................298.1测量控制质量保证措施.....................................298.2路基土石方质量保证措施...................................299.安全生产保证措施.................................................309.1健全制度、落实责任制.....................................309.2边坡作业安全生产保...
