Safety Factor Analysis on the Stability of Slopes and Embankments from Volcanic Ash Stabilization Using Plaxis 2D
Keywords:
Landslide, Plaxis 2d, Safety Factor, Slope Stability, Volcanic Ash StabilizationAbstract
Slope stability analysis has a very important role in civil construction planning, especially in road infrastructure. Slope stability is a crucial aspect in highway construction and maintenance, especially in landslide-prone areas. The level of slope stability is known by calculating and analyzing the value of the safety factor. The safety factor is the ratio between the strength of the slope material and the force acting on the slope. By understanding the safety factors, it can be determined whether the slope is safe to pass on or needs to be repaired. This study aims to analyze the value of safety factors from the slope reviewed using the finite element method to the help of Plaxis 2D software. Case studies were carried out on slopes in sharp bends that often occur in Lamreh, Mesjid Raya District, Aceh Besar Regency. The analysis was carried out on three different conditions, namely the initial condition due to self-weight, the condition due to traffic load, and the condition with soil reinforcement resulting from the stabilization of the volcanic ash mixture. The results obtained in this study were the value of safety factors in three different conditions. In the initial condition due to the weight itself, a safety factor value of 1.068 was obtained, and in the condition due to traffic load, a safety factor value of 1.069 was obtained. After soil reinforcement was carried out with the stabilization method of volcanic ash mixture as much as 15.1%, a safety factor value of 1,582 was obtained. The value of safety factors in the initial condition and due to traffic load from the analysis results showed that the slope was still in a labile state and prone to landslides. After soil reinforcement with volcanic ash stabilization, the safety factor value increased significantly and met the minimum required criteria, which is greater than 1.25. This indicates that the slope becomes more stable and the potential for landslides is lower.
Downloads
References
A. V. Fajarini et al., "Analysis and Improvement, Slope Stability with Reinforcement, Case Study, : Sections, Axis Roads, Sangatta-Rantau Pulung, East Kutai Regency," Journal of Civil Technology, 2023.
Munirwansyah and R. P. Munirwan, "Storie Index and Advanced Analysis of the Causes of National Road Landslides on the Slopes of the Medang Mountains of the Banda Aceh – Meulaboh Section, Aceh Province," in Geotechnic Earthquake Conference, PIT-HATTI Jakarta, 2015.
J.-H. Wang, W.-J. Xu, and X. X. Liu, “A slope stability analysis method considering the rainfall hydrology process,” Eng Geol, vol. 343, p. 107775, 2024.
I. Prasetyo, B. Setiawan, Raden, and H. Dananjaya, "Analysis of Stability of Terraced Slopes with Geotextile Reinforcement Using the Finite Element Method," Journal of Civil Engineering Matrix, 2017.
Wihardi, Munirwansyah, and Sofyan M. Saleh, "Slope Stability Analysis Using Plaxis 8.6 Software with Retaining Wall (Case Study of the Banda Aceh-Medan National Road Section Sta 83+135 Gunung Seulawah)," Journal of Civil Engineering and Planning Archives, vol. 1, no. 3, pp. 76–82, 2018.
R. Ramadhan, Munirwansyah, and M. Sungkar, "Safety Factors of Slope Stability under Existing Conditions and After Reinforced Counterfort Type Soil Retaining Wall with Plaxis Program," Reka Buana: Scientific Journal of Civil Engineering and Chemical Engineering, vol. 5, no. 1, p. 1, 2019.
Bowles, J. E., “Physical and Geotechnical Properties of Soil”, translation by J.K. Hainim (2nd edition), Erlangga Publishers, 1993.
National Standardization Agency, "Indonesian National Standards Geotechnical Design Requirements," 2017.
I. N. Hamdhan and D. S. Pratiwi, "Analysis of Slope Stability in Handling Avalanches on the Cipularang Toll Road Km. 91+200 and Km. 92+600 Using the Element Up Method (FEM)," 2017.
F. Imran, “Abstract Analysis Of Slope Stability And Handling Methods On The Sandy Clay (In Case : Sta 208+00 Double Track Train Martapura-Baturaja),” 2019.
G. Mizuno, E. Sompie, O. B. A. Sompie, and S. Rondonuwu, "Analysis of Soil Stability with Mohr Coulomb and Soft Soil Material Models," Journal of Static Civil Studies, vol. 6, no. 10, pp. 783–792, 2018.
D. O. Latif, A. I. Rifa'i, and K. B. Suryolelono, "Improvement of Mechanical Properties of Expansive Clay Soils Using Sinabung and Limestone Volcanic Ash," 2017.
T. Zahara and Munirwansyah, "Soil Stabilization of Lhokseumawe City Roads with Volcanic Ash on Soil Plasticity Index," Syiah Kuala University Jalan Syech Abdurrauf, vol. 4, no. 3, 2022.
Munirwansyah and R. P. Munirwan, “Stabilization On Expansive Soil For Road-Subgrade For Geotechnic Disaster Approach Article in International Journal of Disaster Management ·,” 2017.
A. Suni, Munirwansyah, and B. Chairullah, "The Effect of Volcanic Ash Mixture on the Value of Shear Strength Parameters of Clay Soil," Journal of The Civil Engineering Student, vol. 5, no. 1, pp. 190–196, 2023.
Suwandi, Munirwansyah, and H. Yunita, “Comparative Analysis of Soil Shear Strength Stabilization of Paya Tumpi Soft Clay with Burni Telong Volcanic Ash – Wih Pesam,” in E3S Web of Conferences, EDP Sciences, Jan. 2024.
Downloads
Published
Issue
Section
License
Copyright (c) 2025 Munirwansyah, Devi Sundary, Thaariq Ziad Mardhatillah (Author)
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
