About activation potential of loess landslide massif
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- Category: Mining mechanics
- Last Updated on Thursday, 16 May 2013 10:11
- Published on Thursday, 15 November 2012 14:46
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Authors:
I.A. Sadovenko, Dr. Sci. (Tech.), Professor, State Higher Educational Institution “National Mining University”, Head of the Department of Hydrogeology and Engineering Geology, Dnipropetrovsk, Ukraine
N.I. Derevyagina, State Higher Educational Institution “National Mining University”, Postgraduate Student of the Department of Hydrogeology and Engineering Geology, Dnipropetrovsk, Ukraine
Abstract:
Purpose. The article deals with quantitative interpretation of boundary where the bond energy of a loess soil is not sufficient to provide the slope stability. It is estimated by energetical and mechanical approaches.
Methodology. Research included a series of triaxial tests carried out for loess soils under different loading conditions. Strength and deformation properties of soils were evaluated based on the results of testing taking into account natural conditions and its physical state. It was established that the loading mode affects deformation modulus value for the same soil up to one order.
Findings. The developed computational scheme takes into account the combination of natural, geological, and geodynamic factors using the complex energy and mechanistic models. The new notion named ‘slope activation potential’ has been proposed as a result of analysis of the field of physical gradients obtained by means of modeling. It was established that the deformation dynamics of a loess slope depends on character of natural geological genesis of sediments and varying geodynamic factors. The proposed technique for modeling of the loess soils stability takes into account the combination of determinants as a finite element discretization of a slope by the equations of deformation continuity and gravity field where anthropogenic and genetic components have been introduced.
Originality. The notion of ‘landslide loess massif activation potential’ required for adequate description of the processes occurring in the loess soils has been formulated.
Practical value. The proposed concept of loess slope activation and its ranges enables distinguishing the different phases of landslides processes. The developed approach has been applied to the site located on the slope of Tunnelna gully in the city of Dnipropetrovsk.
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