Numerical Seismic Approach For Pavement Investigation
[Full Text]
AUTHOR(S)
Aziman Madun, Nurul Hidayah Binti Mohd Kamaruddin, Sid Ahmed Remmani
KEYWORDS
automatic data processing, asphalt pavement, concrete slab, graphical user interface, impact-echo, non-destructive test, Seismic reflection.
ABSTRACT
geophysical studies, the seismic reflection is one of the techniques adopted for mapping the subsurface profile. The seismic reflection method consists of detecting and processing recorded waves that reflect when meeting the media stiffness changes. Due to the enhancing in the data processing technologies, this method can be adopted with cost-effective for shallow investigation, detection anomalies such as cavity and shallow subsurface profiling. The objective of this study is to evaluate the seismic reflection method for measuring the shallow profile of the pavement layer compared with the conventional impact-echo method and thus able to identify the thickness of the asphalt layer. To ensure the applicability of the seismic reflection approach in various situations, a concrete slab is constructed as an experimental testing site alongside the asphalt pavement. The measurements of the concrete slab and the asphalt pavement thickness are successfully obtained using both the seismic reflection and the impact-echo methods. An attempt was made to detect the time of the waves’ first arrival using Matlab software, combined with a graphical user interface to accelerate and automate the data processing and results' calculations.
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