1. School of Civil Engineering, Federal Univ. of Goias, Av. Universitaria, n. 1488, Setor Leste Universitário, Goiania, Goias 74605-220, Brazil (corresponding author).
2. Civil and Environmental Dept., Brasilia Univ., SG-12, Doctorate in Geothecnic, Brasilia, Federal District 70910-900, Brazil.
3. College of Environmental Engineering, FESURV—Rio Verde Univ., Farm Fontes do Saber, Mailbox 104, Campus Universitário, Rio Verde, Goias 75901-970, Brazil.
4. Enterprises Technology Dept., Eletrobras Furnas, BR 153 Highway, Zona Rural Aparecida de Goiania, Goias 74923-650, Brazil.