The Study on Portable Falling Weight Deflectometer Based on the Elastic Half-Space Theory

Abstract:

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.

• Periodical: Applied Mechanics and Materials (Volumes 97-98)
• Pages: 156-161
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.97-98.156
• Online since: September 2011
• Authors: De Cheng Feng, Wen Xin Zuo, Yin Zhao, Peng Cao
• Keywords: Elastic Half-Space Theory, Integral Transform, PFWD, Subgrade Modulus

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