A STUDY ON EVALUATION OF TRAIN DRAFT ON STAIRS AND ESCALATOR UNDER HIGH-SPEED TRAIN PASSAGE

We measured the pressure variation and the train draft on stairs and escalator of stations under high-speed train passage, and it was confirmed the train draft tended to be proportional to the integrated value of the differential pressure and be inversely proportional to the pipe line length. Therefore we suggested the extension of the pipe line as measure of train draft reduction. We installed a shelter over the escalator of the station and formed a pipe line. As a result, it was confirmed that the train draft decreased so that a pipe line became long and we could almost predict the train draft using the expression from the pressure variation without the influence of the pressure loss. In addition, it was confirmed that we could almost predict the train draft at the time of the shelter setting from the integrated value of the differential pressure and the shelter length if we measured the pressure variation at the position that would become the end of the shelter in the state without it.