Abstract
To ensure the safety of the railway operation, inclination angle of piers are constantly being monitored at risk of scour under flood conditions with scour detectors. Once that inclination exceeds a predetermined value, train operation control such as stopping trains and limiting speed is conducted. Scour may, however, gradually proceed without inclination of piers, with inclination suddenly occurring at a certain point, so constant monitoring of the soundness of piers is desirable. From this perspective, we have developed a new scour detector that has a monitoring function for pier soundness based on indicators such as peak frequency of microtremors or displacement of train-induced vibration, in addition to the inclination detection function. Furthermore, we installed the new scour detectors on the pier of several bridges, and confirmed its possibility to capture a change in the trend of the health of the pier. In this paper, we will introduce an overview of this new scour detector.
