Add to ORKGThis paper presents real scale field tests of a group of three steel pipe piles subjected to horizontal impact load. The piles are vibro-driven in marine soft clay, with a L-shape plan layout and free head. The instrumentation of piles consists of an unconventional technique for field tests in marine environment and includes accelerometers at the head of each pile and strain gauges and pore pressure gauges along the fully instrumented corner pile. Some of the results collected as part of this experimental programme are presented, i.e. time histories of strains and accelerations. The dynamic behaviour of the complex soil-water-pile system is discussed in terms of natural frequencies, damping and mode shapes of the first and second pile...