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2015 Impact Factor: 0.519 ©2015 Thomson Reuters, 2015 Journal Citation Report®

ISSN 1822-427X print
ISSN 1822-4288 online



"The Baltic Journal of Road and Bridge Engineering"
Vilnius: Technika, 2006, Vol I, No 3, p. 135-142

Kasthurirangan Gopalakrishnan
Condition Monitoring of Airport Pavements Subjected to Repeated Dynamic Aircraft Loading
The Heavy Weight Deflectometer (HWD) is one of the most commonly used devices for monitoring the structural condition of airport pavement infrastructure systems on a routine basis in a rapid and non-destructive manner. The HWD measures pavement surface response (i e deflections) to an applied dynamic load that simulates a moving wheel of an aircraft at moderate speeds. The pavement surface deflection basins obtained by the HWD tests is frequently used as an indicator of the load-bearing capacity of the pavement. These tests were conducted on flexible test pavements at the US Federal Aviation Administrationís National Airport Pavement Test Facility (NAPTF) at various times to monitor the effect of simulated Boeing 777 and Boeing 747 aircraft gear trafficking on pavement structural condition. Multi-Depth Deflectometers (MDDs) installed within the pavement sections recorded the load-induced displacements in the pavement and in the subgrade. In this paper, the variations in HWD surface deflections acquired at different stages of NAPTF trafficking are compared with the MDD resilient displacements obtained under multiple-wheel heavy aircraft gear trafficking as well as with the periodic rut depth measurements. The results demonstrate the usefulness of routinely collected HWD surface deflection basins for reliable evaluating the structural performance of airport flexible pavements.
Keywords: New Generation Aircraft (NGA), Boeing 777, Boeing 747, Heavy Weight Deflectometer (HWD), NAPTF, Multi-Depth Deflectometer (MDD), surface deflections.

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