Determining the Analysis of the Stability of Embankments against Sliding and Prediction of Sliding and Critical Factor of Safety | Chapter 08 | Novel Perspectives of Engineering Research Vol. 9

 

The ability of sloped soil or rock slopes to endure or undergo movement is referred to as slope stability. In soil mechanics, geotechnical engineering, and engineering geology, slope stability is studied. The goal of most analyses is to figure out what causes slope failure or what circumstances might cause a slope to move, resulting in a landslide. Through mitigation countermeasures, analyses are also aimed at preventing the onset of movement, slowing it down, or stopping it. The stability of slopes is affected by a variety of variables. Soil cohesion, soil friction angle, existing loads, and water surface level are some of these factors. These variables have an impact on the slip surface's shear resistance. One of the oldest approaches for estimating the critical slip surface and minimum factor of safety is the limit equilibrium method (LEM). The impacts of soil material parameters such as soil specific weight (), cohesion (C), angle of internal friction (), geometric slope parameters such as angle with the horizontal (), and slope height (H) on factor of safety (Fs) are studied in this work. Fs is examined in two scenarios: I a slope with dry conditions, and (ii) a steady-state saturated condition with water level drawdown conditions. Furthermore, a slip circle is examined. The SLOPE/W software, which is part of the Geo-Studio software suite, is used to perform these calculations. The data show that reducing the water table level and relieving the slope of hydrostatic pressure reduces the safety factor. Only at near-vertical slopes did the plane failure method give good results when compared to the circular failure method. The results also reveal that each of the three forms of slip happened, however only toe circle slips happened for >. For calculating the slope safety factor, linear and nonlinear regression equations were used.

Author(S) Details

Farzin Salmasi
Department of Water Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.

John Abraham
University of St. Thomas, Minnesota, School of Engineering 2115 Summit Avenue St. Paul, Minnesota 55105, USA.

Bahram Nourani
Department of Water Engineering, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.

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Flooding Speed of Former Lignite Open Pits Regarded as a Determining Factor on the Stability of Final Slopes | Chapter 13 | Emerging Trends in Engineering Research and Technology Vol. 11

 The main exploitation process of lignite in Europe is surface mining. As of 2017, EU output of lignite is somehow stable at approx. 380 million tonnes per year and in Poland, Germany, Greece, the Czech Republic, Romania and Bulgaria, it is a very significant source of electricity. Flooding the remaining gaps of former open pits of lignite is also used internationally, providing opportunities for the use of the lake and the reclaimed land, as well as many benefits, ranging from habitat regeneration to the growth of the local economy. The mechanism of flooding is conditioned by the amounts of water available from natural and/or artificial sources. Flooding may be achieved either by natural methods (inflow of underground water plus water intake from rainfall and superficial drainage), or by natural methods (inflow of underground water plus water intake from rainfall and superficial drainage). Artificial processes, and (water adductions from superficial collectors). Natural flooding has the benefit of lowering costs, unlike artificial flooding, but it is a long-lasting operation. As a result of rising water levels and saturation of rocks from the final slopes, geotechnical phenomena such as landslides can occur, depending on the flooding speed. The purpose of the paper is to create the dependency between the rate of water level rise in the lake and the rock's geotechnical behaviour in the internal dump. Based on this the flooding process needs to be intensified by adductions, as the hydrostatic pressure manifested on the final slopes determines the increase in their reserve of stability.

Author (s) Details

Dr. Eng. Florin Faur
Department of Environmental Engineering and Geology, University of Petrosani, Faculty of Mining, Romania.


Dr. Eng. Izabela Maria Apostu
Department of Environmental Engineering and Geology, University of Petrosani, Faculty of Mining, Romania.


Dr. Eng. Maria Lazăr
Department of Environmental Engineering and Geology, University of Petrosani, Faculty of Mining, Romania.

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