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奥体中心站基坑开挖及支护方案82


目录
1.编制依据.......................................................................................................................................................... 1 2.工程概况.......................................................................................................................................................... 1 2.1 工程概况 ............................................................................................................................................... 1 2.2 气候特征 ............................................................................................................................................... 4 2.3 地质概况 ............................................................................................................................................... 4 2.4 周边环境及管线情况 ........................................................................................................................... 6 3.工程重点、难点分析...................................................................................................................................... 6 4.施工筹划.......................................................................................................................................................... 7 4.1 施工场地布置 ....................................................................................................................................... 7 4.2 总体施工方案 ....................................................................................................................................... 7 4.3 主要工序工期分析 ............................................................................................................................... 8 4.4 人员组织及职责 ................................................................................................................................... 8 4.5 基坑监测准备 ....................................................................................................................................... 9 4.6 机械设备配备 ....................................................................................................................................... 9 6 基坑开挖方案................................................................................................................................................. 10 6.1 基坑开挖总体筹划 ............................................................................................................................. 10 6.2 基坑开挖 ............................................................................................................................................. 12 6.3 基坑开挖注意事项 ............................................................................................................................ 15 7 网喷混凝土施工............................................................................................................................................. 16 7.1 网喷施工方法 ..................................................................................................................................... 16 7.2 网喷施工工艺流程 ............................................................................................................................. 17 8 冠梁施工......................................................................................................................................................... 19 9 钢围檩、钢支撑体系施工............................................................................................................................. 21 9.1 布置形式 ............................................................................................................................................. 21 9.2 钢围檩、钢支撑的加工 ..................................................................................................................... 23 9.3 钢围檩、钢支撑的安装 ..................................................................................................................... 23 9.4 钢支撑预加轴力 ................................................................................................................................. 26 9.5 施工注意事项 ..................................................................................................................................... 26 10 监测施工方案............................................................................................................................................... 27 10.1 监测工作目的及原则 ....................................................................................................................... 27 10.2 监测设计依据 ................................................................................................................................... 28 10.3 监测内容、方法及数量 ................................................................................................................... 28 10.4 监测工期及频率 ............................................................................................................................... 44 10.5 监测控制标准、报警值及安全性判定 ........................................................................................... 44 10.6 监测成果提交与信息反馈 ............................................................................................................... 47 11.基坑开挖应急预案...................................................................................................................................... 48 11.1 应急组织体系 ................................................................................................................................... 48 11.2 成立现场应急组及其职责 ............................................................................................................... 50 11.3 风险因素分析及应对措施 ............................................................................................................... 51 11.4 应急设备物资 ................................................................................................................................... 52 11.6 预防预警 ........................................................................................................................................... 53 11.7 应急响应程序 ................................................................................................................................... 54 11.8 事故调查总结 ................................................................................................................................... 54 1

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