Field tests investigating the ground borne vibration induced by railway tunnel

초록

Whilst the ministry of land, transportation and maritime affairs (MLTM) of South Korean government approved the Great Train eXpress (GTX) project for constructing underground railway tunnel in the Seoul metropolitan district at a depth of 40~60m by year 2021 for providing an express train service from suburban (Gyeonggi-do) areas to downtown Seoul, there are growing concerns about the likely vibrations induced by underground railway tunnel and their effects on surroundings. This paper describes the test procedures adopted and the findings obtained from the full-scale field tests aiming to investigate the ground borne vibration induced by railway tunnel in hard rock. The ground borne vibration induced by a high-speed train (the Korea Train eXpress (KTX) service) running at a speed of approximately 200km/hr was measured using borehole seismographs in order to investigate the wave propagation of the ground borne vibration. This paper also discusses the limitation associated with current practice of measuring ground borne vibration using conventional seismograph.