The Effect of Soil Load Variations on Cone Penetration Results in Shallow Foundation Dimensions: Case Study

The purpose of this study is to determine the variation of load values ​​on shallow foundations applied to short-span bridges in the Kutalimbaru Bridge Project, Deli Serdang Regency and the depth value has been obtained from cone penetration results, and to determine the value of the Kutalimbaru bridge floor plate. The variation of the value indicates per 10% of the actual value until it reaches the limit of the value used. The cone penetration test on this bridge was taken from 2 points with a depth of S-1 3.2 m and S-2 2.2 m. The test results show a Cone Penetration Resistance value of S-1 250 kg / cm2 and a Total Shear Resistance of 720 kg / cm S-2 250 kg / cm2 and a Total Shear Resistance of 420 kg / cm. So, the type of original soil is predominantly rocky sand with a little clay. The results of the analysis show that shallow foundations can withstand loads up to 98, 634 tons, with a foundation soil stress of 3.41 kg / cm2 and a soil allowable stress of 3.33 kg / cm2. The control value of the thickness of the bridge floor slab for K350 concrete quality, and for the permissible punching shear stress is 12.16 kg/cm² and the punching stress that occurs is 2.81 kg/cm which is smaller than the thickness value of the bridge floor slab. Keywords: Shallow foundation, bridge, cone penetration .