ICS93.030 CCSP41 3401 安徽 省合肥 市地方 标 准 DB3401/T353—2024 城镇雨污 分 流 改 造 技 术 导 则 Technica lguidelin e sforurbanrainandsewagediversio n 2024-12-23发布 2024-12-23实施 合肥市市场监督 管 理 局  发布 DB3401/T353—2024 I目次 前言.......................................................................................................................................................................II 1范围.....................................................................................................................................................................1 2规范性引用文件.................................................................................................................................................1 3术语和定义.........................................................................................................................................................1 4基本规定.............................................................................................................................................................3 5混接调查与评估.................................................................................................................................................3 一般规定.....................................................................................................................................................3 调查目的.....................................................................................................................................................3 调查范围.....................................................................................................................................................3 混接区域筛查.............................................................................................................................................4 混接点（源）探查.....................................................................................................................................6 排水管道状况调查.....................................................................................................................................6 混接及管道健康状况评估.........................................................................................................................7 6设计.....................................................................................................................................................................7 一般规定.....................................................................................................................................................7 混接改造设计.............................................................................................................................................8 管段缺陷改造设计.....................................................................................................................................9 管材及附属设施.........................................................................................................................................9 7施工与验收.......................................................................................................................................................10 一般规定...................................................................................................................................................10 施工...........................................................................................................................................................10 验收...........................................................................................................................................................10 8运维与长效监管...............................................................................................................................................10 一般规定...................................................................................................................................................11 公共排水设施运维..................................................................................