认识保护层的主要作用，对提高水运工程混凝土结构使用寿命具有重要意义。
It is of great significance to recognize the main functions of protective cover for prolonging the service life of maritime concrete structures.
加固是提高钢筋混凝土结构安全度、减少事故隐患，延长结构使用寿命的有效方法。
Reinforcement is an effective way of improving the structural safety, decreasing accidents, prolonging the life of concrete structure.
外包钢加固是提高钢筋混凝土结构安全度、减少事故隐患，延长结构使用寿命的有效方法。
Strengthening by steel armoured is an effective method for increasing degree of safety and decreasing possibility of accident and elongating service life in the reinforced concrete structure.
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