ICS 93.060 CCS P 27 44 广东省 地方标准 DB44/T 2721—2025 公路钢壳混凝土沉管隧道结构设计规范 Specifications for design of steel shell concrete structural of highway imersed tunnel 2025 - 08 - 20发布 2025 - 11 - 20实施 广东省市场监督管理局 发布 DB44/T 2721 —2025 I 目次 前言 ................................ ................................ ................ III 引言 ................................ ................................ ................. IV 1 范围 ................................ ................................ ................ 1 2 规范性引用文件 ................................ ................................ ...... 1 3 术语和定义 ................................ ................................ .......... 2 4 符号 ................................ ................................ ................ 3 作用和作用效应 ................................ ................................ .. 3 计算指标 ................................ ................................ ........ 3 几何参数 ................................ ................................ ........ 4 计算系数及其它 ................................ ................................ .. 4 5 基本规定 ................................ ................................ ............ 5 6 材料 ................................ ................................ ................ 5 钢板 ................................ ................................ ............ 5 混凝土 ................................ ................................ .......... 5 钢筋 ................................ ................................ ............ 6 牺牲阳极金属 ................................ ................................ .... 6 止水带 ................................ ................................ .......... 6 7 结构设计 ................................ ................................ ............ 6 一般规定 ................................ ................................ ........ 6 总体设计 ................................ ................................ ........ 7 管节构造要求 ................................ ................................ .... 7 钢壳构造要求 ................................ ................................ .... 7 加劲肋和连接件构造要求 ................................ .......................... 9 受压翼缘局部稳定 ................................ ............................... 10 钢壳混凝土结构脱空限值 ................................ ......................... 10 防火设计 ................................ ................................ ....... 10 最终接头 ................................ ................................ ....... 11 结构健康监测 ................................ ................................ .. 11 8 计算与分析 ................................ ................................ ......... 11 一般规定 ................................ ................................ ....... 11 作用与组合 ................................ ................................ ..... 11 结构计算 ................................ ................................ ....... 12 抗震验算 ................................ ................................ ....... 18 DB44/T 2721 —2025 II 9 耐久性设计 ................................ ................................ .......... 19 一般规定 ................................ ................................ ........ 19 表面预处理 ................................ ................................ ...... 19 涂层保护 ................................ ................................ ........ 19 牺牲阳极 ................................ ................................ ........ 20 10 舾装件设计 ................................ ................................ ......... 21 一般规定 ................................ ................................ ....... 21 计算及构造要求 ................................ ................................ . 21 附录A（规范性） 钢壳混凝土管节检验要求 ................................ ............... 23 附录B（规范性） 冲击映像仪选用要求及检测流程 ................................ ......... 24 附录C（规范性）