Abstract
Under flood conditions, a river flow can have a scouring action on a bridge pier foundation, reducing its stability and even toppling it, and as a result causing a severe train accident. In addition to installing protection works and rebuilding deteriorated piers, imposing operational restrictions according to water level is a practical method to secure safe train operations. In order to decide an appropriate regulation, it is required to investigate structural condition of bridge piers. However, it is impossible to estimate the conditions of whole scouring apprehended bridge piers in more detail. Therefore, it is important to establish the extraction system for such bridge piers from simple parameters related to scouring. In this paper, a relationship between structural data of bridge pier from routine inspection work and past scouring phenomenon were examined by multiple statistical analysis. Based on a result of their analysis, we proposed simple estimating method for scouring apprehended bridge piers under flood conditions.
