Soil and rock dynamics
Vibrations in soil and rock materials are caused by dynamic loads such as earthquakes, pile and sheet pile driving, compaction, road and railway traffic, blasting and drilling. For many years, we have developed enhanced and more environmentally friendly methods for dynamic processes, such as sheet pile driving and vibratory compaction, and conducted research within dynamic and cyclic soil and rock properties, remedial measures against ground vibrations, wave propagation and seismic tests. One important application of cyclic soil properties is material degradation and rearrangement in road and railway embankments, which is studied in order to ensure a sustainable and cost-effective transportation infrastructure. Remedial measures against ground vibrations are particularly relevant in Sweden since the soft clays that are common in coastal areas can transmit large vibrations and disturbance, for example, from railway tracks to nearby residential buildings. We have many years of experience in research regarding stiffening measures in the ground, such as dry deep mixing columns, and development of less disturbing foundation methods to minimize environmental vibrations from traffic and construction activities.