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DB11/T 489-2016 建筑基坑支护技术规程
简介
DB11/T 489—2016 备案号∶ J13247一2016
建筑基坑支护技术规程
Technical specification for retaining and protecting of building foundation excavation （报批稿）
2016-12-01实施
2016-08-10发布 目 次 1 总则...........................................................................................................................................1 2 术语和符号...............................................................................................................................2 2.1 术语.......................................................................................................................................2 2.2 符号......................................................................................................................................3 3 基本规定...................................................................................................................................5 3.1 设计原则...............................................................................................................................5 3.2 勘察要求...............................................................................................................................7 3.3 支护结构选型 .......................................................................................................................8 3.4 水平荷载...............................................................................................................................9 3.5 质量检测.............................................................................................................................14 4 放坡.........................................................................................................................................15 4.1 放坡设计.............................................................................................................................15 4.2 放坡施工.............................................................................................................................15 4.3 质量检测.............................................................................................................................15 5 支挡式结构.............................................................................................................................17 5.1 一般规定............................................................................................................................17 5.2 结构分析............................................................................................................................17 5.3 基坑稳定性验算 .................................................................................................................18 5.4 双排桩设计.........................................................................................................................21 5.5 截面承载力计算 .................................................................................................................23 5.6 锚杆计算.............................................................................................................................24 5.7 构造要求.............................................................................................................................26 5.8 施工.....................................................................................................................................29 5.9 质量检测.............................................................................................................................31 6 土钉墙.....................................................................................................................................33 6.1 一般规定.............................................................................................................................33 6.2 设计.....................................................................................................................................33 6.3 施工....................................................................................................................................38 6.4 质量检测.............................................................................................................................41 7 地下水控制.............................................................................................................................42 7.1 一般规定............................................................................................................................42 7.2 截水.....................................................................................................................................43 7.3 降水.....................................................................................................................................43 7.4 集水明排.............................................................................................................................50 7.5 回灌.....................................................................................................................................50 8 基坑开挖.................................................................................................................................51 8.1 一般规定.............................................................................................................................51 8.2 开挖.....................................................................................................................................51 8.3 地下水控制.........................................................................................................................51 8.4 封底及回填.........................................................................................................................52 9 监测.........................................................................................................................................53 9.1 一般规定.............................................................................................................................53 9.2 监测项目.............................................................................................................................53 9.3 巡视检查.............................................................................................................................54 9.4 监测点布置.........................................................................................................................55 9.5 监测频率.............................................................................................................................56 9.6 监测报警.............................................................................................................................57 9.7 监测成果.............................................................................................................................58 附录 A 基坑支护设计文件内容.................................................................................................60 附录 B 锚杆钢腰梁按简支梁考虑时选型参考表 .....................................................................63 附录 C 渗透稳定性验算.............................................................................................................64 本规程用词说明.............................................................................................................................66 引用标准名录.................................................................................................................................67 条文说明.........................................................................................................................................68
DB11/T 489—2016 备案号∶ J13247一2016
建筑基坑支护技术规程
Technical specification for retaining and protecting of building foundation excavation （报批稿）
2016-12-01实施
2016-08-10发布 目 次 1 总则...........................................................................................................................................1 2 术语和符号...............................................................................................................................2 2.1 术语.......................................................................................................................................2 2.2 符号......................................................................................................................................3 3 基本规定...................................................................................................................................5 3.1 设计原则...............................................................................................................................5 3.2 勘察要求...............................................................................................................................7 3.3 支护结构选型 .......................................................................................................................8 3.4 水平荷载...............................................................................................................................9 3.5 质量检测.............................................................................................................................14 4 放坡.........................................................................................................................................15 4.1 放坡设计.............................................................................................................................15 4.2 放坡施工.............................................................................................................................15 4.3 质量检测.............................................................................................................................15 5 支挡式结构.............................................................................................................................17 5.1 一般规定............................................................................................................................17 5.2 结构分析............................................................................................................................17 5.3 基坑稳定性验算 .................................................................................................................18 5.4 双排桩设计.........................................................................................................................21 5.5 截面承载力计算 .................................................................................................................23 5.6 锚杆计算.............................................................................................................................24 5.7 构造要求.............................................................................................................................26 5.8 施工.....................................................................................................................................29 5.9 质量检测.............................................................................................................................31 6 土钉墙.....................................................................................................................................33 6.1 一般规定.............................................................................................................................33 6.2 设计.....................................................................................................................................33 6.3 施工....................................................................................................................................38 6.4 质量检测.............................................................................................................................41 7 地下水控制.............................................................................................................................42 7.1 一般规定............................................................................................................................42 7.2 截水.....................................................................................................................................43 7.3 降水.....................................................................................................................................43 7.4 集水明排.............................................................................................................................50 7.5 回灌.....................................................................................................................................50 8 基坑开挖.................................................................................................................................51 8.1 一般规定.............................................................................................................................51 8.2 开挖.....................................................................................................................................51 8.3 地下水控制.........................................................................................................................51 8.4 封底及回填.........................................................................................................................52 9 监测.........................................................................................................................................53 9.1 一般规定.............................................................................................................................53 9.2 监测项目.............................................................................................................................53 9.3 巡视检查.............................................................................................................................54 9.4 监测点布置.........................................................................................................................55 9.5 监测频率.............................................................................................................................56 9.6 监测报警.............................................................................................................................57 9.7 监测成果.............................................................................................................................58 附录 A 基坑支护设计文件内容.................................................................................................60 附录 B 锚杆钢腰梁按简支梁考虑时选型参考表 .....................................................................63 附录 C 渗透稳定性验算.............................................................................................................64 本规程用词说明.............................................................................................................................66 引用标准名录.................................................................................................................................67 条文说明.........................................................................................................................................68
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