我国有相当一部分大坝属病险坝，需要进行加固。
A considerable part of DAMS in our country are the dangerous and abnormal DAMS that should be reinforced.
某斜腿刚构桥经过多年使用出现了一些病害后，需要进行加固。
A rigid frame bridge with inclined legs is strengthened due to some disease after several years' running.
由于各种因素的影响，部分已竣工的钢筋混凝土结构随着时间的推移，需进行保养并对裂缝进行修补，情况严重时，混凝土结构强度达不到设计要求，需要进行加固处理。
Due to various factors, some reinforced concrete structure in need of maintenance and repair cracks, some concrete not meet the design requirements of structural strength, needs to reinforcement.
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