Assessment of Slope Stability of Various Cut Slopes with Effects of Weathering by Using Slope Stability Probability Classification (SSPC)

Date

2017-04-28

Author

Ersöz, Timur
Topal, Tamer

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Rocks containing pore spaces, fractures, joints, bedding planes and faults are prone to weathering due to temperaturedifferences, wetting-drying, chemistry of solutions absorbed, and other physical and chemical agents.Especially cut slopes are very sensitive to weathering activities because of disturbed rock mass and topographicalcondition by excavation. During and right after an excavation process of a cut slope, weathering and erosion mayact on this newly exposed rock material. These acting on the material may degrade and change its properties andthe stability of the cut slope in its engineering lifetime.In this study, the effect of physical and chemical weathering agents on shear strength parameters of the rocks areinvestigated in order to observe the differences between weathered and unweathered rocks. Also, slope stabilityassessment of cut slopes affected by these weathering agents which may disturb the parameters like strength,cohesion, internal friction angle, unit weight, water absorption and porosity are studied. In order to compare thecondition of the rock materials and analyze the slope stability, the parameters of weathered and fresh rock materialsare found with in-situ tests such as Schmidt hammer and laboratory tests like uniaxial compressive strength, pointload and direct shear. Moreover, slake durability and methylene blue tests are applied to investigate the response ofthe rock to weathering and presence of clays in rock materials, respectively. In addition to these studies, both rockstrength parameters and any kind of failure mechanism are determined by probabilistic approach with the help ofSSPC system. With these observations, the performances of the weathered and fresh zones of the cut slopes areevaluated and 2-D slope stability analysis are modeled with further recommendations for the cut slopes.Keywords: 2-D Modeling, Rock Strength, Slope Stability, SSPC, Weathering

URI

https://hdl.handle.net/11511/73059

Conference Name

19th EGU General Assembly (23-28 April 2017)

Collections

Department of Geological Engineering, Conference / Seminar

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Citation Formats

T. Ersöz and T. Topal, “Assessment of Slope Stability of Various Cut Slopes with Effects of Weathering by Using Slope Stability Probability Classification (SSPC),” presented at the 19th EGU General Assembly (23-28 April 2017), Vienna, Austria, 2017, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/73059.