Analisis korelasi nilai cone resistance (QC) terhadap kapasitas dukung aksial fondasi tiang pada bangunan gedung perwakilan mta sragen

The bearing capacity of bored pile foundations is strongly influenced by 
soil characteristics, particularly the cone resistance (qc) value obtained 
from Cone Penetration Test (CPT) investigations. This study aims to 
analyze the correlation between cone resistance (qc) and the axial 
bearing capacity of bored pile foundations at the MTA Representative 
Building Project in Sragen Regency. The research employed a 
quantitative approach using secondary data derived from CPT results 
and geotechnical investigation reports. The axial bearing capacity was 
calculated using the Meyerhof (1963) and Schmertmann-Nottingham 
(1975) methods. Furthermore, a linear regression analysis was conducted 
to evaluate the relationship between qc and the ultimate bearing capacity 
(Qult). The results indicate that the ultimate bearing capacity and 
allowable bearing capacity increase with increasing qc values, pile 
diameter, and foundation depth. Based on the Meyerhof method, the Qult 
values range from 3.956 ton/m² to 179.7002 ton/m², while the 
Schmertmann-Nottingham method produces Qult values ranging from 
44.60 ton/m² to 113.84 ton/m². The regression analysis resulted in the 
equation y = 0.0365x + 32.994 with a coefficient of determination (R²) of 
0.3833, indicating a positive relationship between qc and Qult. The 
findings suggest that cone resistance (qc) can be used as an important 
parameter in estimating the axial bearing capacity of bored pile 
foundations, although other geotechnical parameters should also be 
considered to improve prediction accuracy.