Abstract
Data obtained from a FWD test are time series of loading and surface deflections at several locations, since it is an impulsive test. Thus dynamic backcalculation is more suitable than static one because the former conforms to a nature of the test. The software based on the concept is called DBALM (Dynamic Backcalculation for Layer Moduli). DBALM, which was originally based on MS-DOS command line interface, has been revised and simplified by implementing GUI. The windows version of DBALM is called “Easy DBALM for Windows”. This development has brought simplification of input data and visualization of output.
