Discrete element analysis of a cross-river tunnel under random vibration levels induced by trains operating during the flood season

摘要: Floods result in many problems, which may include damage to cross-river tunnels. The tunnel, as a new style of transportation, deserves large amount attention. In this paper, large-scale tunnel model is proposed based on discrete element method (DEM). Micro parameters used the are calibrated by proposing triaxial numerical model. Different situ strata, high water pressures normal flood-water levels and random vibration induced running trains taken into account evaluate dynamic characteristics high-stress deformation stress analysis. results show that upper half including concrete lining surroundings, at higher risk than lower half. Vibration waves transferring surroundings undergo an amplification process. particles vault separate move downward then reassemble during vibrations. levels, represented particle accelerations, under flood conditions those conditions. As train speed increases, acceleration track foundation accompanied decrease deformation.