PERBANDINGAN NILAI CALIFORNIA BEARING RASIO (CBR) LAPANGAN DAN LABORATORIUM TERHADAP KUAT GESER TANAH

Abstract

Construction of roads to facilitate land access from one place to another. Adequate road infrastructure has a positive impact, such as reducing traffic jams. When building roads, it is necessary to pay attention to the subgrade, because the subgrade is the main factor in the strength of the structure above it. This research aims to provide data on the carrying capacity and characteristics of the basic soil. The research was conducted on the Mamminasata Bypass Road and Bridge Construction Project Segments I and II, Maros Regency. The data used in this research is primary data in the form of laboratory data related to soil physical properties as well as field data, namely the Dynamic Cone Penetrometer test. In this research, based on the USCS and AASHTO soil classification systems, it shows that the soil in 3 Quarry is sandy and contains clay. Comparison of laboratory CBR with field CBR shows that the field CBR at 3 quarries ranges from 6,32-7,04%, which has a greater value than the laboratory CBR at 3 quarries, ranging from 5,13-5,67%.This data shows that the results of compacting the embankment soil in the field are suitable for use as base soil. This CBR value is closely related to the shear strength value that occurs in the soil, which is around 4,417-4,539 kg/ cm2, where based on the CBR value obtained, it shows that the greater the CBR value, the smaller the shear that occurs in the soil.