ICS 93.080 CCS P 66 44 广东省 地方 标准 DB44/T 2689—2025 高速公路改扩建工程设计规范 Specification for design of expressway engineering reconstruction and widening 2025 - 06 - 11发布 2025 - 09 - 11实施 广东省市场监督管理局 发布 DB44/T 2689 —2025 I 目次 前言 ................................ ................................ ................. IV 引言 ................................ ................................ .................. V 1 范围 ................................ ................................ ............... 1 2 规范性引用文件 ................................ ................................ ..... 1 3 术语和定义 ................................ ................................ ......... 2 4 基本规定 ................................ ................................ ........... 2 5 既有公路调查、检测与评价 ................................ ........................... 3 一般规定 ................................ ................................ ....... 3 路线调查与评价 ................................ ................................ . 3 路基调查、检测与评价 ................................ ........................... 5 路面调查、检测与评价 ................................ ........................... 7 桥涵调查、检测与评价 ................................ .......................... 10 隧道调查、检测与评价 ................................ .......................... 12 路线交叉调查与评价 ................................ ............................ 13 交通工程及沿线设施调查、检测与评价 ................................ ............ 14 交通组织调查与评价 ................................ ............................ 15 环境保护与景观调查与评价 ................................ ..................... 15 既有公路安全性评价 ................................ ........................... 16 6 总体设计 ................................ ................................ .......... 16 一般规定 ................................ ................................ ...... 16 技术标准 ................................ ................................ ...... 16 改扩建形式 ................................ ................................ .... 19 总体设计要点 ................................ ................................ .. 19 7 路线 ................................ ................................ .............. 20 一般规定 ................................ ................................ ...... 20 横断面设计 ................................ ................................ .... 21 平面设计 ................................ ................................ ...... 21 纵面设计 ................................ ................................ ...... 22 8 路基 ................................ ................................ .............. 22 一般规定 ................................ ................................ ...... 22 路床拼宽 ................................ ................................ ...... 23 一般填方路基拼宽 ................................ .............................. 23 高路堤与陡坡路堤拼宽 ................................ .......................... 24 一般挖方路基拼宽 ................................ .............................. 25 深路堑拼宽 ................................ ................................ .... 25 软土路基拼宽 ................................ ................................ .. 25 DB44/T 2689 —2025 II 路基拼宽排水 ................................ ................................ ... 26 路基装配式设计 ................................ ................................ . 26 路基临时工程 ................................ ................................ .. 27 9 路面 ................................ ................................ ............... 27 一般规定 ................................ ................................ ....... 27 设计要求 ................................ ................................ ....... 27 拼宽新建路面设计 ................................ ............................... 28 既有路面设计 ................................ ................................ ... 28 路面拼接 ............................