使用水泥材料对现有混凝土结构进行结构干预 第 4 部分：护套

[中文适用范围]： 本文件规定了采用套箍法进行结构干预的设计、施工和维护的标准要求，该方法将钢筋或纤维增强聚合物 (FRP) 格栅等增强材料放置在现有混凝土柱或梁的外围，并用胶凝材料将这些构件套箍。本文件规定了使用胶凝材料对现有混凝土结构进行结构干预的设计和实施原则以及针对缺陷和持续劣化的策略，包括但不限于：a) 机械作用，例如疲劳、冲击、超载、沉降引起的移动、爆炸、振动和地震作用；b) 环境的化学和生物作用，例如硫酸盐侵蚀、碱骨料反应；c) 物理作用，例如冻融、热开裂、水分移动、盐结晶、火灾和侵蚀；d) 钢筋腐蚀；e) 自施工时未解决的原始施工缺陷。 [外文原描述]： This document specifies the standard requirements regarding design, construction and maintenance to be applied for structural intervention using the jacketing method, which places reinforcing materials such as reinforcing steel or fibre-reinforced polymer (FRP) grids around the periphery of existing concrete column or beam and jackets these members with cementitious materials. This document specifies structural intervention of existing concrete structures using cementitious materials design and execution principles, and strategies for defects and on-going deterioration including, but not limited to: a) mechanical actions, e.g. fatigue, impact, overloading, movement caused by settlement, blast, vibration, and seismic actions; b) chemical and biological actions from environments, e.g. sulfate attack, alkali-aggregate reaction; c) physical actions, e.g. freeze–thaw, thermal cracking, moisture movement, salt crystallization, fire, and erosion; d) reinforcement corrosion; e) original construction defects that remained unaddressed from the time of construction.