Slope Stability Analysis of Vertical Unsupported Slopes near West Approaches of Al-Alam Bridge Slope Stability Analysis

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Fatima A. K. Khattab
Farouk M. Muhauwiss

Abstract

There are vertical slopes on the western banks of Tigris near Al-Alam Bridge in Tikrit, Iraq. These slopes are not supported and are located near an important road at Tikrit University. This study aims to find a safety factor (FOS) of the slope to prevent failure, besides its effect on human and financial losses. The study consists of two parts: the first part studied the layers of the slope and found the soil resistance coefficients. The second part analyzed the stability of the natural slope itself under the impact of the water level change of the Tigris River and the external loading. The analysis was done by a program called (PLAXIS 3D), which depends on the finite element method. The finite element method is a numerical approach that searches for approximate solutions and solves problems by dividing the problem into several triangular elements linked to each other by points called (nodes). The results showed that the vertical slope stability at the natural state with no influences indicated was in a semi-stable state with a factor of safety equal to (1.04865). The factor of safety decreased by (0.423%) with rising the river level until it reached (1.04074) at (93 m a.s.l.[1]). As for the applied external loads condition, the factor of safety for imposed (50,150 and 250 kN/m2) decreased by (4.738%), then the soil body failed when the factor of safety was (0.9902). In the critical state, the soil body failure at this stage and the factor of safety became equal to (0.98769) with decreasing by (5.812%).

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References

Huang YH. Slope Stability Analysis by the Limit Equilibrium Method: Fundamentals and Methods. 1 ed: ASCE Press; 2014. DOI: https://doi.org/10.1061/9780784412886

Ogeli Z. Analysis of Slope Stability Using Shear Strength Reduction SSR. Aleppo University; 2011.

Arora KR. Soil Mechanics & Foundation Engineering In Si Units. 6 ed: Standard Publishers Distributors; 2004.

Budhu. Soil mechanics and foundations. 3 ed: John Wiley & Sons; 1999.

Murthy V. Principles and practices of soil mechanics and foundation engineering. New York: Marcek Decker INC 2002.

Rouaiguia A, Dahim MA. Numerical modeling of slope stability analysis. International Journal of Engineering Science and Innovative Technology 2013;2(3):533-542.

Johansson J. Impact of water-level variations on slope stability. Luleå tekniska universitet; 2014.

Meng Q, et al. Numerical analysis of slope stability under reservoir water level fluctuations using a FEM-LEM-combined method. Geofluids 2020;2020. DOI: https://doi.org/10.1155/2020/6683311

Feng X, Li M, Ma P, Li Y. Factorial experiment of slope stability under slope-top loading and heavy rainfall. IOP Conference Series: Earth and Environmental Science: IOP Publishing; 2019. pp. 032065. DOI: https://doi.org/10.1088/1755-1315/330/3/032065

Chen KP, Liu JY, Yuan BX. Environmental safety analysis for slope under the situation with and without load on top surface. Advanced Materials Research: Trans Tech Publ; 2012. pp. 2114-2117. DOI: https://doi.org/10.4028/www.scientific.net/AMR.356-360.2114

Wei W. Three dimensional slope stability analysis and failure mechanism. 2008.

B. Das, "Fundamentals of Geotechnical Engineering, Thomson," USA, 2005.

Carter M, Bentley SP. Correlations of soil properties: Pentech press publishers; 1991.

BR V, Shivananda P, Swathivarma R, Bhaskar M. Some of Limit Equilibrium Method and Finite Element Method based Software are used in Slope Stability Analysis. International Journal of Application or Innovation in Engineering & Management (IJAIEM) 2017;6(9):5.

Griffiths D, Lane P. Slope stability analysis by finite elements. Geotechnique 1999;49(3):387-403. DOI: https://doi.org/10.1680/geot.1999.49.3.387

Plaxis B. PLAXIS 3D 2013 reference manual. PLAXIS BV, Delft 2013.

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