Comparative analysis of the stability of the left aboutment of the concrete bridge and the stone on the Karian Dam, Lebak Banten District

Abstract

The abutment of the Karian Dam bridge, which is a gravity type, has a height of 25.5m, so the abutment is at high risk of damage in the form of subsidence, shifting, overturning and so on. Therefore, it is necessary to analyze the stability of the abutments on the Karian Dam bridge by calculating the stability against sliding, overturning, eccentricity and soil bearing capacity so that the abutments can be declared safe. This research aims to determine the safety of the bridge abutments on the Karian Dam and also compare them with the abutment design. stone pairs. The method used to analyze abutment stability in this research is the Coulomb method. The abutment planning stage, such as in retaining wall structures, basically uses a trial and error system by analyzing stability which must meet the safety factors of Bolting≥ 1.5, Shear FK ≥ 1.5, Eccentricity FK≤ 1/6 B, DDT FK ≥ 3. The results of the stability analysis of reinforced concrete abutments state that the abutments can withstand shear, overturning, the bearing capacity of the soil, but the eccentricity is not in the core area (1/6 B), while the abutments of river stone masonry state that the abutments can withstand shear, overturning, soil bearing capacity, and eccentricity.