Akademik Veri Yönetim Sistemi
REVISTA DE LA CONSTRUCCION, cilt.24, sa.1, ss.75-88, 2025 (SCI-Expanded)
Mine
haul roads are one of the most critical components of mining operation sites,
both in terms of vehicle operating conditions and costs and in terms of
providing the stable rolling surface required for sustainable haulage. There are many methods to
determine layer materials
and thicknesses in a traditional mine haul road section consisting of sub-base, base, and
surface layers. The "California Bearing Ratio (CBR) Cover
Curve" method, which is simple and practical to apply, is a common
method frequently preferred in the design of mine haulage roads.However, the CBR
method has disadvantages, such as being empirical and
ignoring the surface layer stiffness in the design. In this study, vertical
strainvalues on the
subgrade were obtained by mechanical analysis of the pavement sections
recommended by the CBR method and having different
subgrade CBR values, loading conditions, and surface layer stiffnesses. The
obtained strain values were compared with the limit strain values given
in the literature, and the sufficiency of the CBR method was analyzed based on different
design parameters. The results obtained from the study show that the limit
strain values exceeded in the sections recommended by the CBR method, depending
on the increase in the subgrade CBR value and the wheel load values on the
section. One of the most notable results of the current
study is that the stiffness of the surface layer in direct contact with vehicle
wheels is one of the most essential parameters in the design of mine haul
roads. In mine haul roads where the surface layer rigidity is low or there is
no surface layer, the sections recommended by the CBR method are insufficient, and it
has been revealed that a high-rigidity unbound layer, bituminous surface layer,
or rigid pavement should be used as the surface layer.