Recalibrated Correlations between Dynamic Cone Penetrometer (DCP) Data and California Bearing Ratio (CBR) in Subgrade Soil
Jirawat Chokkerd,
Artit Udomchai,
Sivarit Sultornsanee,
Niwat Angkawisittpan,
Piyanat Jantosut,
Noppadol Sangiamsak,
Nopanom Kaewhanam
Affiliations
Jirawat Chokkerd
Department of Civil Engineering, Faculty of Engineering, Mahasarakham University, Maha Sarakham 44150, Thailand
Artit Udomchai
School of Civil Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
Sivarit Sultornsanee
College of Engineering, Northeastern University, Boston, MA 02115, USA
Niwat Angkawisittpan
Research Unit for Electrical and Computer Engineering Technology (RECENT), Faculty of Engineering, Mahasarakham University, Maha Sarakham 44150, Thailand
Piyanat Jantosut
Department of Civil Engineering, Faculty of Engineering, Mahasarakham University, Maha Sarakham 44150, Thailand
Noppadol Sangiamsak
Department of Civil Engineering, Faculty of Engineering, Mahasarakham University, Maha Sarakham 44150, Thailand
Nopanom Kaewhanam
Department of Civil Engineering, Faculty of Engineering, Mahasarakham University, Maha Sarakham 44150, Thailand
This study investigates the correlation between the California Bearing Ratio (CBR) and the Dynamic Cone Penetrometer (DCP) for subgrade soil analysis. The paper aims to provide practical equations for predicting CBR values from DCP test results, therefore enhancing the efficiency of soil assessments in engineering practice. By analyzing test data and proposing correlations for different soil groups, the study introduces recalibrated correlations that demonstrate high accuracy in predicting CBR values. The newly proposed equations offer reliable predictions with R2 values of 0.89, 0.92, and 0.94 for clean sand, silty sand or sandy silt, and cohesive soil, respectively. These correlations serve as valuable tools for engineers, enabling rapid and accurate CBR estimations for improved decision-making in various engineering projects.
