海洋环境钢筋混凝土结构耐久性监测和检测对比研究

海洋环境下，码头等港口基础设施混凝土结构因受氯离子侵蚀而面临严峻的耐久性问题。目前对结构物的耐久性诊断主要通过定期人工检测的方式。随着传感器及通讯技术的发展，以监测手段为主的耐久性诊断得到越来越多的应用。监测、检测方法原理上的差别导致了基于两类数据实施的状态评估和寿命预测方法的不同。依托某高桩码头工程建立的耐久性监测系统，对阳极梯监测数据进行分析，并利用检测手段开展数据对比研究。已有监测数据显示，大部分监测点氯离子未渗透到传感器，码头状态良好。基于部分已出现腐蚀特征的传感器的监测数据计算得到构件寿命为58 a。进一步的实体结构氯离子浓度检测分析结果表明，氯离子渗透情况与阳极梯监测数据具有一致性。基于检测计算的构件寿命为63 a，监测数据计算的寿命较检测数据计算的寿命更短。

Comparison study on durability monitoring and inspection for reinforced concrete structure in marine environment

In marine environment, reinforced concrete in port facilities such as wharfs is facing severe durability problems due to the ingression of chloride. Nowadays, regular manual inspection is the main approach in durability diagnosis for infrastructures. Nevertheless, durability diagnosis based on monitoring has been increasingly used with the development of sensor and communication technology. However, structural status assessment as well as lifetime prediction based on monitoring and inspection data are different as the theoretical bases of these two methods are different. Based on the durability monitoring system in a high-piled wharf, analysis of anode ladder monitoring data and comparison of monitoring data and inspection data were conducted. Monitoring data indicated that for most of the monitoring points, chloride did not reach the sensors, showing a good durability status of the wharf. With the monitoring data from sensors showing corrosion characteristic, the concrete element lifetime was calculated and the results was 58 a. Meanwhile, inspection results of chloride concentration of the structural element indicated that chloride penetration condition showed good consistency from anode ladder monitoring data. And the lifetime calculated through inspection data was 63 a, longer than that from monitoring data.