ICS 93.020 CCS P 22 DB42 湖北省 地方标准 DB42/T 2542—2026 市政管涵基坑工程技术规程 Technical specification for excavation engineering of the municipal pipeline and box culvert 2026 - 04 - 03发布 2026 - 08 - 03实施 湖北省住房和城乡建设厅 联 合 发 布 湖北省市场监督管理局 DB42/T 2542 —2026 I 目次 前言 ................................ ................................ ................ III 1 范围 ................................ ................................ ............... 1 2 规范性引用文件 ................................ ................................ ..... 1 3 术语和定义 ................................ ................................ ......... 1 4 符号 ................................ ................................ ............... 2 5 基本规定 ................................ ................................ ........... 3 6 工程勘察与环境调查 ................................ ................................ . 4 6.1 一般规定 ................................ ................................ ....... 4 6.2 工程勘察 ................................ ................................ ....... 4 6.3 环境调查 ................................ ................................ ....... 5 7 支护结构选型与计算 ................................ ................................ . 5 7.1 一般规定 ................................ ................................ ....... 5 7.2 支护结构选型 ................................ ................................ ... 5 7.3 基坑稳定性验算 ................................ ................................ . 6 8 钢桩支护 ................................ ................................ .......... 11 8.1 一般规定 ................................ ................................ ...... 11 8.2 构造 ................................ ................................ .......... 11 8.3 施工 ................................ ................................ .......... 15 8.4 检验 ................................ ................................ .......... 15 9 水泥土搅拌墙（桩）内插钢桩支护 ................................ .................... 15 9.1 一般规定 ................................ ................................ ...... 15 9.2 构造 ................................ ................................ .......... 16 9.3 施工 ................................ ................................ .......... 16 9.4 检测 ................................ ................................ .......... 16 10 灌注桩支护 ................................ ................................ ....... 17 10.1 一般规定 ................................ ................................ ..... 17 10.2 构造 ................................ ................................ ......... 17 10.3 施工 ................................ ................................ ......... 17 10.4 检测 ................................ ................................ ......... 17 11 内支撑 ................................ ................................ ........... 18 11.1 一般规定 ................................ ................................ ..... 18 11.2 构造 ................................ ................................ ......... 18 11.3 施工 ................................ ................................ ......... 19 11.4 检验 ................................ ................................ ......... 19 DB42/T 2542 —2026 II 12 坑内加固 ................................ ................................ .......... 20 12.1 一般规定 ................................ ................................ ...... 20 12.2 构造 ................................ ................................ .......... 20 12.3 施工 ................................ ................................ .......... 21 12.4 检测 ................................ ................................ .......... 22 13 放坡护面与喷锚网 ................................ ................................ .. 22 13.1 一般规定 ................................ ................................ ...... 22 13.2 构造 ..............................