Influence of seismic events on shallow geotechnical structures

Abstract

This paper deals with a summary of possible seismic loading of shallow geotechnical structures. It is known that seismic loading influences the underground structures much less than the structures on the surface, therefore, it is not usually taken into account. However, cracks or damage in lining occur due to vibration from time to time. Two effects of earthquakes are documented on these structures: an effect due to faulting and an effect due to vibration. At present, FEM is the most popular method to solve the above problems. Integrated earthquake simulation is the most frequent task that has a significant impact on seismic hazard and seismic risk estimations, and human actions against earthquake disasters. Three types of rock massif were defined for this study: soft rock, medium hard rock, and hard rock. More detailed description and sensitivity analysis are performed for circle cross-section of those structures. Sensitivity analysis was performed using soil interaction method according to Wang's methodology; change of lining diameter and elastic modulus of lining were tested. Thrust force must also be calculated for the no-slip condition. Graphs presented in this paper document individual relations between individual studied parameters. These results can be used as sufficient accurate final analysis while idealised conditions can be accepted.