Prediction of ground vibrations generated by a falling-weight pavement breaker

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Prediction of ground vibrations generated by a falling-weight pavement breaker

Mohammad Amin LAK, Stijn FRANC¸OIS, Geert DEGRANDE, Geert LOMBAERT
Department of Civil Engineering, KU Leuven
Kasteelpark Arenberg 40, B-3001 Leuven - Belgium
email: amin.lak@bwk.kuleuven.be

 

Abstract— Pavement breaking generates a high level of
ground vibration that is potentially damaging to nearby
buildings and infrastructures. In this paper, a numerical
model for the estimation of the impact load due the blow of a
falling-weight pavement breaker is first developed. The estimated
impact load is in good agreement with the experimental
result. Next, the fracturing of the concrete road is investigated
and the amount of dissipated energy is found to be only
a small fraction of the impact energy. The large part of the
impact energy is transferred to the soil and causes ground vibrations.
Finally, a non-linear road-soil interaction model is
developed and numerically verified. The model accounts for
both road-soil separation as well as the inelastic behaviour of
the soil. The model is used to predict ground vibrations generated
by the operation of a multi-head pavement breaker.
Up to 25m from the road, the predicted ground vibrations
agree with the experimental results while at large distances
the model underestimates the response

.
Keywords—pavement breaking, ground vibration, fallingweight
impact, non-linear road-soil interaction

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