Yoshio TATSUMI

Study on evaluation method of road base strength by using time data from Handy-FWD

Osamu TAKASHASHI

In current use of Handy-FWD strength of road base evaluated based on a deformed coefficient, which is calculated by using only the peak values of load and deflection. In this study, Handy-FWD tests and plate ?bearing tests were curried out on the test base to discuss an appropriate data analysis in it.
Based on static analysis results, of were calculated in static analysis and dynamic analysis result of were calculated in dynamic analysis. The base modulus was estimated with each analysis method.
Comparing the static analysis with dynamic analysis, it was confirmed that the results from static analysis were more appropriate. In addition, a new indicator of strength of base by using the historical time data was introduced .We also justify validity of our proposed procedure by comparing the result of the new procedure with the result of the plate-bearing test.