Determination of Critical Slip Surface in Loose Rock Slope Stability Analysis | [Proceedings of the Pakistan Academy of Sciences: A. Physical and Computational Sciences • 2024]

Author(s):

1. Zulkifl Ahmed: School of Resource and Civil Engineering, Northeastern University,Shenyang,China

2. Sumra Yousuf: Department of Building and Architectural Engineering, Faculty of Engineering and Technology, Bahauddin Zakariya University,60000 Multan,Pakistan

3. Mahwish Zahra: Department of Architecture Design, National Fertilizer Corporation Institute of Engineering and Technology (NFC-IET),60000 Multan,Pakistan

4. Anum Aleha: Department of Architecture Design, National Fertilizer Corporation Institute of Engineering and Technology (NFC-IET),60000 Multan,Pakistan

5. Abid Latif: Department of Civil Engineering, Faculty of Engineering and Technology, Bahauddin Zakariya University,60000 Multan,Pakistan

6. Tahir Sultan: Department of Civil Engineering, Faculty of Engineering and Technology, Bahauddin Zakariya University,60000 Multan,Pakistan

7. Tanveer Ahmad Khan: Department of Building and Architectural Engineering, Faculty of Engineering and Technology, Bahauddin Zakariya University,60000 Multan,Pakistan

8. Muhammad Yousaf Raza Taseer: Department of Structure and Materials, Faculty of Civil Engineering,Universiti Teknologi Malaysia 81310, UTM, Johar,Malaysia

Abstract:

Determination of representative Critical Slip Surface (CSS) for loose rock slope is one of the most important topics for slope reinforcement design. In this paper, a SLOPE/W software is used to analyze the failure characteristics of CSS considering the spatial variability efect of strength parameters. Initially, the Morgenstern-Price limiting equilibrium method was selected within the framework of SLOPE/W software to examine the failure mechanism of CSS and the corresponding Factor of Safety (FS) for a loose rock slope comprised of two diferent materials. Also, the variability efect of shear strength parameters (cohesion, friction angle) on minimum FS, the maximum depth ( D), sliding arc length (L), distribution range of slip surfaces and slip surface entry point distance (De) were investigated through software. The results showed that all slip surfaces are mostly parallel and the local failure can happen at the top of the slope. Statistically, local failure has entry and exit points situated at the crest and near the toe of the slope, respectively. Shear strength parameters have a remarkable efect on FS, D, L and De of critical slip surface. The distribution range of CSS decreased with an increasing the amount of cohesion and friction angle. These findings can help to locate the actual position of CSS and slip surface entry point distance in case of loose rock slope.

Page(s): 145-152

DOI: 10.53560/PPASA(61-2)867

Published: Journal: Proceedings of the Pakistan Academy of Sciences: A. Physical and Computational Sciences, Volume: 61, Issue: 2, Year: 2024

Keywords:

MorgensternPrice Method , Critical Slip Surface , Failure Mechanism , Entry Point Distance , Loose Rock , FS

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