Document Type : Research Paper
Authors
1 Scientific Board, Agricultural and Natural Resources Research Center, Mazandaran, Iran
2 MSc Student, Sciences and Researches Unit, Azad Islamic University, Iran
Abstract
In order to assess the stability of slopes of the proposed sites for the construction of a composting plant, field studies, laboratory experiments, analysis of geological engineering and geotechnical data of the site location were performed. Results of studies indicate the existence of the phenomenon of occurrences of old landslides at the site. After collecting data, and analyzing the factors affecting the recurrence of landslide using both limit equilibrium stability analysis and Slope / w software, Factor of Safety (FOS) and probability of occurrences (FOS<1) in various conditions based on Bishop method were calculated. Based on the results, the lowest FOS values under saturated conditions and dynamic loading of the probability of earthquakes was found to be (pseudo static analysis) equal to 0.676 which shows in this situation slope is unconditionally unstable. Highest FOS in static conditions was equivalent to 1.30 where it is applied to drainage would increase to 1.50. Accordingly, construction of deep drains and drainage wells is suggested to collect groundwater and subsurface flows in order to reduce degree of saturation and increase FOS and stability while providing safety would be economically justified.
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