ICS13 .030.20 CCS Z 01DB4401 广 州 市 地 方 标 准 DB4401/T 232—2023 市政排水管道设计施工技术规程 Codefordesignandconstructionofmunicipalsewers 2023-10-13发布 2023-11-13实施 广州市市场监督管理局 发 布 DB4401/T 232—2023 I目 次 前言 .. ................................................................................. V 1 范围 ................................................................................. 1 2 规范性引用文件 ....................................................................... 13 术语和定义 ........................................................................... 24 符号和缩略语 ......................................................................... 35 总体要求 ............................................................................. 46 设计流量 ............................................................................. 5 6.1 污水量 ........................................................................... 56.2 雨水量 ........................................................................... 66.3 合流污水量和截流倍数 ............................................................. 8 7 排水管道设计 ......................................................................... 8 7.1 一般规定 ......................................................................... 9 7.2 水力计算 ......................................................................... 9 7.3 管道 ............................................................................ 117.4 倒虹管 .......................................................................... 127.5 管线综合 ........................................................................ 12 8 附属构筑物设计 ...................................................................... 13 8.1 检查井 .......................................................................... 13 8.2 跌水井 .......................................................................... 14 8.3 水封井 .......................................................................... 148.4 雨水口 .......................................................................... 148.5 截流井 .......................................................................... 158.6 闸槽井 .......................................................................... 168.7 出水口 .......................................................................... 16 8.8 水质检测井 ...................................................................... 17 9 立体交叉道路排水设计 ................................................................ 17 9.1 高架道路排水 .................................................................... 17 9.2 下穿立交道路排水 ................................................................ 17 10 排水管道结构设计 ................................................................... 18 10.1 一般规定 ....................................................................... 1810.2 承载能力极限状态计算规定 ....................................................... 1910.3 正常使用极限状态验算规定 ....................................................... 1910.4 基本构造要求 ................................................................... 20 11 管道接口、基础及地基处理设计 ....................................................... 20 11.1 管道接口 ....................................................................... 20