Comparison of stability analysis methods for safe design of volcanic rock slope

Authors

  • I Gde Budi Indrawan Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada, Jl. Grafika Bulaksumur, Sleman, Yogyakarta 55284, Indonesia
  • Sunardi Ministry of Public Works and Housing of the Republic of Indonesia, Jl. Pattimura No.20, Jakarta 12110, Indonesia
  • Ardian Baroto Murti Nusantara Adidaya Investama, Jl. Tebet Barat VIII No.10, Tebet, Jakarta 12810, Indonesia
  • Rifki Alfrianto PT Hutama Karya (Persero), HK Tower, Jl. MT Haryono Kav. 8, Cawang, Jakarta 13340, Indonesia

DOI:

https://doi.org/10.15243/jdmlm.2024.121.6651

Keywords:

pseudostatic, slope, stability, static, volcanic

Abstract

The performance of the stability chart (SC), limit equilibrium (LE), and finite element (FE) methods for stability analysis of weathered volcanic rock slopes under static and earthquake loads is not fully understood. This research aimed to evaluate the performance of the SC, LE, and FE methods for slope stability analyses by studying a case of a weathered volcanic rock slope at the Leuwikeris Dam diversion tunnel in Indonesia. Site characterisations were carried out to obtain the input parameters for the static and pseudostatic slope stability analyses. The results showed that using various search methods of failure surface and the suggested optimum number of finite elements, multiple non-circular failure surfaces were predicted from the LE and FE methods that were not anticipated in the initial slope design based on the SC method. The location and shape of the failure surfaces from the LE method agreed with those from the FE method. The difference between the Fs values from the static LE analysis and those from the static FE analyses was less than 14%, but the discrepancy increased up to 78% in the pseudostatic analyses. This study highlights the importance of validating the results from one method with the other methods to prevent slope failures.

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Submitted

11-06-2024

Accepted

03-08-2024

Published

01-10-2024

How to Cite

Indrawan, I. G. B., Sunardi, Murti, A. B., & Alfrianto, R. (2024). Comparison of stability analysis methods for safe design of volcanic rock slope. Journal of Degraded and Mining Lands Management, 12(1), 6651–6664. https://doi.org/10.15243/jdmlm.2024.121.6651

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Section

Research Article