Deterministic-empirical backcalculation of LWD deflection basins

• Autores: R.N. Stubstad, H.C. Korsgaard, K. Olsen, J.P. Pedersen
• 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. 689-694
• Idioma: inglés
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• Resumen

  • A new method of calculating layered-elastic moduli from Light Weight Deflectometer (LWD) deflection basins is introduced. The suggested procedure is called “Deterministic-Empirical Backcalculation” since it utilizes closed-form solutions to calculate at least two modulus values, or stiffnesses, from LWD load-deflection data on a point-bypoint basis. At least three deflection readings are required at appropriate distances from the LWD loading plate, depending on the structure tested and the diameter (200 or 300 mm) of the plate. Background technical information is provided on the theory behind and the development of the Deterministic-Empirical Backcalculation (acronym—DEB) methodology.