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  Volume 3, Number 3, July 2018 , pages 269-288

A new approach to estimate the factor of safety for rooted slopes with an emphasis on the soil property, geometry and vegetated coverage
Pouyan Abbasi Maedeh, Wei Wu, António Viana da Fonseca, Kourosh Ghaffari Irdmoosa, Madhu Sudan Acharya and Ehsan Bodaghi

    180 different 2D numerical analyses have been carried out to estimate the factor of safety (FOS) for rooted slopes. Four different types of vegetated coverage and a variety of slope geometry considering three types of soil have been evaluated in this study. The highly influenced parameters on the slope\'s FOS are determined. They have been chosen as the input parameters for developing a new practical relationship to estimate the FOS with an emphasis on the roots effects. The dependency of sliding mode and shape considering the soil and roots-type has been evaluated by using the numerical finite element model. It is observed that the inclination and height of the slope and the coverage type are the most important effective factors in FOS. While the soil strength parameters and its physical properties would be considered as the second major group that affects the FOS. Achieved results from the developed relationship have shown the acceptable estimation for the roots slope. The extracted R square from the proposed relationship considering nonlinear estimation has been achieved up to 0.85. As a further cross check, the achieved R square from a multi-layer neural network has also been observed to be around 0.92. The numerical verification considering different scenarios has been done in the current evaluation.
Key Words
    rooted slope; numerical; relationship; factor of safety
Pouyan Abbasi Maedeh, Wei Wu, Madhu Sudan Acharya: University of Natural Resources and Life Sciences, Institue of Geotechnical Engineering, Vienna, Austria
António Viana da Fonseca: University of Porto, Faculty of civil engineering, Porto, Portugal
Kourosh Ghaffari Irdmoosa: Kharazmi University, Faculty of engineering, Iran, Tehran
Ehsan Bodaghi:Islamic Azad University, South Branch, Tehran, Iran

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