A new approach to determining the slip surface in tuff to determine the volume of landslide material: A case study on the West Sinjai road section, Sinjai Regency, South Sulawesi, Indonesia

Authors

  • Busthan Busthan Department of Geological Engineering, Faculty of Engineering, Universitas Hasanuddin, Gowa 92171, South Sulawesi, Indonesia
  • Hendra Pachri Department of Geological Engineering, Faculty of Engineering, Universitas Hasanuddin, Gowa 92171, South Sulawesi, Indonesia
  • Ilham Alimuddin Department of Geological Engineering, Faculty of Engineering, Universitas Hasanuddin, Gowa 92171, South Sulawesi, Indonesia
  • Syamsul Bahri PT. Berau Coal, Tanjungredeb, Berau 77311, East Kalimantan, Indonesia
  • Syarifullah Bundang Department of Mining Engineering, Khairun University, Ternate 97711, North Maluku, Indonesia

DOI:

https://doi.org/10.15243/jdmlm.2024.112.5533

Keywords:

landslide material, slip surface, tuff, weathering grade

Abstract

Analysis of landslide slip surface based on the engineering properties of tuff rocks, including shear strength, water content, and infiltration rate on the West Sinjai road section, South Sulawesi, Indonesia. This study aimed to analyze the effect of shear strength, water content infiltration rate, and weathering grade of tufa rocks in the study area. The methods used in this study area included a study of weathered tuff profile characteristics, weathered tuff infiltration testing and residual soil (RS) determination of weathered tuff water content and residual soil, and testing of shear strength of weathered tuff and residual soil. This research used aspects of engineering geology, including shear strength, water content, and infiltration rate, as well as rock weathering grade to determine the slip surface in tuff to determine the volume of landslide material. The results showed that the tuff profile consisted of four grades, namely moderately weathered tuff (MW), highly weathered tuff (HW), completely weathered tuff (CW), and soil residual (RS). The rate of tuff infiltration increases with increasing weathering grade. The water content is more significant with the high degree of weathering of tuff. At the same time, the shear strength decreases with high weathering. Therefore, the research area is prone to landslide events. The slip surface is in a layer of moderately weathered tuff rock (MW), and those that experience landslides are highly weathered tuff rock (HW), completely weathered (CW), and residual soil (RS).

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Submitted

04-10-2023

Accepted

20-12-2023

Published

01-01-2024

How to Cite

Busthan, B., Pachri, H., Alimuddin, I., Bahri, S., & Bundang, S. (2024). A new approach to determining the slip surface in tuff to determine the volume of landslide material: A case study on the West Sinjai road section, Sinjai Regency, South Sulawesi, Indonesia. Journal of Degraded and Mining Lands Management, 11(2), 5533–5538. https://doi.org/10.15243/jdmlm.2024.112.5533

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Section

Research Article

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