Analytical and Numerical Analysis of Retaining Wall Stability in Soft Soil: A Case Study of the Sakan–Mendawai Drainage Project in Palangka Raya
DOI:
https://doi.org/10.20527/bpi.v8i2.294Keywords:
Retaining wall, soft soil, stability analysis, Rankine theoryAbstract
This study aims to analyze the stability of a counterfort retaining wall constructed on soft cohesive soil at the Sakan–Mendawai drainage project in Palangka Raya. Analytical methods based on Rankine’s earth pressure theory were used to calculate safety factors against overturning, sliding, and bearing failure, resulting in values of 5.644, 4.513, and 10.741, respectively. To complement the analysis, numerical modelling using PLAXIS was applied specifically to estimate the overall stability of the wall–soil system, yielding a safety factor of 1.503. The results confirm that the design meets standard safety criteria under static loading conditions. While the numerical model was limited to overall safety assessment, the combination of analytical and numerical approaches offers a clear and practical evaluation of retaining wall performance in soft soil contexts. Keywords: Retaining wall, soft soil, stability analysis, Rankine theoryReferences
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