Due to the effect of marine environment, the corrosion of steel reinforcement in concrete structure is a very serious
issue, so the field detection of steel reinforcement corrosion is very important. The Lianyun Harbor, a famous sea harbor
in China with more than one hundred year history, was chosen to do the case study of the field detection. The corrosion
ratio of the sampled steel reinforcement was obtained according to the field investigation in Lianyun Harbor and the
experiment done in the laboratory. The chloride concentration in the concrete of different position and the sampled
concrete at different depths in the splash zone was also measured in the laboratory. Moreover, the corrosive parameter of
concrete structure was obtained by statistical analysis. The test results indicate that the reinforcement corrosion was very
serious. The corrosion ratio of the sampled steel reinforcement and the concentration of chloride in concrete samples
were both very high, which showed that Berth 14# in Lianyun Harbor was deteriorated badly. The chloride content at
splash zone of Berth 57# and Berth 58# were also very high, which indicated that the chloride penetration for
reinforcement concrete structures was very serious. The bearing capacity and the reliability of members could be
calculated based on experiment data. The bearing capacity and the reliability of members decreased obviously and the
members were needed to be maintained and strengthened in time.
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