钱塘江下沙海塘混凝土结构耐久性检测与分析

为了对已建钱塘江海塘混凝土结构的耐久性作一分析和评价，针对影响水工混凝土结构耐久性破坏（失效）的主要因素，根据钱塘江海塘下沙段所处的环境条件及混凝土结构形式等情况，制定出对裂缝、混凝土强度、碳化深度、氯离子含量以及抗渗性等的检测方案．对检测结果的分析表明，钱塘江海塘混凝土结构的耐久性良好，影响其耐久性的主要因素是表面裂缝和混凝土的抗渗性．

Durability Inspection and Analysis on Concrete Structure of Xisha Seawall

The main influential factors on the durability of hydraulic concrete structures are analyzed in the essay and the durability of Xiasha Section, Qiangtang River Seawall is also evaluated. The lacking of proper routine examination for the completed concrete structure results in the destroying of concrete structure because of the insufficient durability with unquantifiable loss. The examination plan about the crack, the concretes intensity, the carbonized depth, the chloride ion content as well as impermeability and so on has been formulated, concerning about the environmental condition and the concrete structure forms based on the spot investigation. The test result indicates that the concrete durability of Qiantang River Seawall is outstanding in concrete durability with the surface cracking and the concretes impermeability as its major factors.