Using falling weight deflectometer data for new construction interactive design

• Autores: C.A. Lenngren
• Localización: Bearing capacity of roads, railways and airfields: proceedings of the 8th International Conference on the Bearing Capacity of Roads, Railways and Airfields, Champaign, Illinois, USA, June 29-July 2, 2009 / Erol Tutulumluer (dir.), Imad L. Al-Qadi (dir.), Vol. 1, 2009, ISBN 9780415804325, págs. 729-738
• Idioma: inglés
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• Resumen

  • The present paper is a case study of a new road construction project in Southern Sweden. Wet weather made static plate loading test impossible to conduct on the subgrade. Rather, FWD testing was carried out on unbound layer surfaces and the static plate load tests were then assessed from these tests. The conditions at the site continued to be wet and difficult and more tests were carried out on the subsequent layers. The asphalt bound base course was laid in June 2007. The final binder and wearing courses were placed in 2008 after a year in service. FWD tests were conducted at the site at no less than eight instances in different stages of the construction. The water present in the subgrade and subbase was found to slowly decrease over time. By backcalculating asphalt strain, the final asphalt layer thickness could be reduced without jeopardizing the strain criteria postulated in the code.