Evaluation of Safety Factors for the Stability of Bridge Abutments Using GEO5 on Bored Pile Foundations
DOI:
https://doi.org/10.33474/jice.v7i2.25576Keywords:
Stability Analysis, Critical Slip Surface, Geotechnical Engineering, Limit Equilibrium, Bored Pile FoundationsAbstract
Bridge abutments are essential substructure components that transfer loads from the superstructure to the foundation and the supporting soil. The stability of abutments must be ensured, as they are subject to various loads, including vertical loads, lateral earth pressure, and traffic loads, which may affect overall structural safety. This study aims to evaluate the global stability safety factor of bridge abutments supported by bored pile foundations using the GEO5 software. The analysis was conducted using numerical modeling based on the Limit Equilibrium Method (LEM), incorporating soil investigation data, including unit weight, cohesion, internal friction angle, and the geometric characteristics of the abutment and foundation system. The analysis results show that the critical slip surface is located around the embankment and the adjacent soil layers surrounding the abutment. The calculated safety factors for five loading combinations range from 4.54 to 4.60, which are significantly higher than the minimum required safety factor of 2.50. Therefore, the abutment with bored pile foundations demonstrates satisfactory global stability and fulfills the required safety criteria against potential slope or soil failure.
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