Numerical Analysis of Hollar Landslide   Ali Majidi Department of Civil Engineering, Babol University of Technology, Mazandaran, Iran Asskar Janalizadeh Choobbasti Assistant Professor, Department of Civil Engineering Babol University of Technology, Mazandaran, Iran Email: asskar@nit.ac.ir
			ABSTRACT

The falling and sliding of some of Hollar trenches is a research subject that attracted a group of geological investigators for a time about at least ten years. It is believed that the plastic properties of soil involved in sliding surface, infiltration of water into soil mass, erosion of soil at the toe of the slide and increasing ground water level causes the instability of the slope. In an attempt to make a suggestion for stabilizing the landslide, a complementary study involving field and laboratory investigations has been performed. A detailed geological and geotechnical survey of the site and its surroundings was performed using available geological maps, air photos and published literature. So, finding the response of sliding and suggesting the suitable and economical method, by taking into account the effect of climate, tectonic and geology situation of sliding zone, which is located in Mazandaran, northern part of Iran is the main purpose of this paper. On the basis of this investigation it is concluded that the main reason of the slide is the high precipitation and kind of landslide soil. In accordance with the Hollar numerical analysis using the finite element software, the best method of stabilizing the landslide area is to use drainage method.

Keywords: landslide, heavy rainfall, water table, drainage, stabilization

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