冲岩方案.doc

北京路***巷 KC2008-08 号冲击岩层施工方案湖北华亚建设工程有限公司 2012 年9月冲岩施工专项方案 1 目录 1 、编制依据·································································································· 2 2 、工程概况·································································································· 2 工程概述···························································································· 2 工程地质概况····················································································· 3 3 施工部署···································································································· 7 4 施工方案····································································································· 8 钻机选择··························································································· 8 泥浆制备、循环·················································································· 9 冲孔································································································ 10 终孔、清孔······················································································ 12 钢筋笼制作及安装············································································· 12 灌注水下砼······················································································· 13 施工注意事项···················································································· 14 常见问题······················································································ 14 其他注意事项················································································· 15 5 关键技术·································································································· 15 . 防止塌孔、偏孔的措施······································································· 15 槽段冲孔施工质量保证措施·································································· 16 6 安全保证措施····························································································· 17 交通安全措施·············