Ryden, Nils; Lund University; Sweden
Ryden, N.; Lund University; Sweden
Bjurström, H.; Transport Administration; Sweden
Starkhammar, J.; Lund University; Sweden
Lindh, P.; Swedish Geotechnical Institute; Sweden
Session: Civil Infrastructure 1
Time: 14:10 - 14:30
Non-destructive methods can be used for quality control during the production of civil engineering infrastructures such as pavements, bridges, tunnels, and piles. Three examples are presented here where relatively simple seismic measurements are used for quality control of pavements, stabilized soil, and the backfill material in segmental lining tunnels. Pavement testing is demonstrated with rolling air-coupled microphones using a 48 channel microphone array. Stabilized soil testing is demonstrated using a combination of seismic field testing and laboratory resonance frequency testing. Laboratory testing is used for pre-calibration of the unknown and unique velocity-strength relationship in the stabilized soil. Tunnel testing is conducted using a modified impact echo method, impact echo Q-factor, where the amplification of the thickness resonance frequency is quantified and linked to the stiffness and status of the backfill material. Results show great potential for improved efficiency in quality control during the production of civil engineering infrastructures.