TITLE:
Design and Application of a Multichannel Analysis Surface Waves Acquisition System for the Pavement Layers Investigation
AUTHORS:
Cheikh Diallo Diene, Mapathé Ndiaye
KEYWORDS:
Survey, Road, Elastic Properties, MASW, Arduino, Raspberry, Geophone
JOURNAL NAME:
Open Journal of Civil Engineering,
Vol.12 No.1,
January
26,
2022
ABSTRACT: This study aims to design and develop a pavement
non-destructive quality testing device with
the MASW method. Unlike the traditional acquisition techniques that
plants geophones on the pavement, the presented approach uses no-tip geophones,
placed directly on the pavement surface to preserve its integrity. To proceed,
a seismograph using an Arduino Due microcontroller connected to a Raspberry Pi
4 nano-computer was developed. The receivers consist of 6 4.5 Hz GD geophones
connected together by a graduated tape to control
the inter-trace distance and to in order to acquire data in land-streamer. The recording is triggered by a KY-038 sound sensor. The Arduino
acts as an analog-to-digital converter while the Raspberry is used as a
real-time data visualization and processing interface. The obtained seismic
data has been processed using the Geopsy open-source software which allows the
analysis and inversion of the dispersion curves. The studied system has been
tested in 4 different sites. The obtained seismic VS and VP velocities as a function of the depth allowed to deduce the elastic properties
of the pavement layers and to decide on their mechanical quality with the
possibility of integrating the results in the road data banks.