Athens Acropolis Arrephorion fill embankment

In the area of Arrephorion (inside the Athens Acropolis walls), the Acropolis Restoration Service (YSMA) indicated a specific area to be filled with the method of reinforced earth. A FBG sensor (Fiber Bragg Grating Sensor) was placed between successive layers of earth reinforcement. The sensor was glued onto a carbon fiber strip.