Determinación de una correlación entre el valor de CBR y el ensayo DCP para suelos del cantón Cuenca

Abstract

The CBR for its acronym in English (California Bearing Ratio), is an important factor in the design of pavements, and in the evaluation of pavements. However, the execution of the test represents a high cost and time. For the determination of the CBR in situ, the ASTM standard and other authors have established correlations with the field test called DCP by its acronym for Dynamic Cone Penetration Test; allowing to relate the CBR in situ with the DCP value obtained in the field. However, since there is no relationship between these parameters applied to the city of Cuenca, and even to other parts of Ecuador, the use of existing correlations between the two parameters has been stopped. Therefore, the determination of the CBR is considered important, based on a correlation with the DCP test applied to soils in the city of Cuenca, and it is proposed to establish it through a statistical analysis of linear regression and validate it based on existing correlations in the literature. The present work gets two correlations, between the DCP and the CBR in situ with a determination coefficient R2 of 0.911; and between the DCP, the dry field density, and the CBR, obtaining an adjusted coefficient of determination R2 of 0.930. The correlation established between the CBR and DCP was compared with the expressions proposed in the specialized literature, and it was determined that it maintains a similar behavior, establishing that the correlation obtained is valid, and a fast and economical way to obtain the parameter CBR for different soils in our city.