The Study on Portable Falling Weight Deflectometer Based on the Elastic Half-Space Theory
As a quick, accurate and efficient inspecting equipment, the Portable Falling Weight Deflectometer (PFWD) is widely used in subgrade modulus evaluation in the foreign countries. However, most analysis methods used in the modulus back calculation of PFWD is based on the classical Boussinesq solution or empirical formulas, which could hardly reflect the resilient of subgrade accurately. In this paper, the elastic half-space theory is introduced into the analysis of modulus back calculation, and with the integral transform and the numerical analysis, this paper provides an approximate method to evaluate the elastic modulus of subgrade.
D. C. Feng et al., "The Study on Portable Falling Weight Deflectometer Based on the Elastic Half-Space Theory", Applied Mechanics and Materials, Vols. 97-98, pp. 156-161, 2011