Phase I: T1a

According to the analytical and numerical analysis, the presence of non-resonating mass (dead-mass) over the soil surface, modify the attenuation performance of the seismic surface waves. During the first phase of the experimental tests, plastic barrels filled with the sand ( approximately 100 kg of mass) are employed and placed over the pristine soil. A non-resonating barrier is realized by a regular grid of 5X10 plastic barrels (2.8 m X 6.3 m) with the spacing of approximately 20 cm. multichannel analysis of surface waves (MASW) is performed across this grid.

Phase I: T1a setup

Grid of 5X10 (2.8 m X 6.3 m) barrels creates a non-resonating barrier.
Barrels placed directly over the soil surface.
Excitation source with a variable offset from barrier wavefront at a distance of 4, 6 and 8 meters excite the grid.
Different source positions around the barrier perimeter are considered.
Sledgehammer and Vibro-impactor are used to generate surface seismic waves.
10 series of tests for each source is recorded.
Real-time data recording for the synchronized accelerometers and seismometers (except R1 to R4).

Phase I: T1a

T1a experimental test setup

MASW across the 5X10 grid of non-resonating mass over the soil surface (2.8 m X 6.3 m) (dead-mass, T1a settings)
Plastic barrels filled with sand and equivalent weight of approximately 100 kg present dead-masses of setting T01.
Vibro-impactor source excites seismic surface waves along the symmetry line of the grid.
Sledgehammer source used for seismic wave excitation at different positions.

Phase I: T1a

Phase I: T1a setup

Phase I: T1a

MASW across the 5X10 grid of non-resonating mass over the soil surface (2.8 m X 6.3 m) (dead-mass, T1a settings)

Plastic barrels filled with sand and equivalent weight of approximately 100 kg present dead-masses of setting T01.

Vibro-impactor source excites seismic surface waves along the symmetry line of the grid.

Sledgehammer source used for seismic wave excitation at different positions.