Abstract
Nablus-Al Bathan Road which connects Nablus City and Jordan Valley in the West Bank of Palestinian Territories, was widened, reconstructed and rehabilitated in 2009, however, between 2010 and 2012 road defects at several locations were observed. To fix these defects especially at station 2 + 100 of the road, soil replacement in the body of the road and big boulders to support the edge of the road were used. Unfortunately, large settlement occurred in the part of the road under maintenance and more sliding and slope instability occurred in the road at station 2+ 100 during the remedial measures. Studies were carried out to find the causes of this problem. These included surveying of the area, geotechnical studies (making trial pits, performing geophysical seismic exploration and digging out several boreholes), in addition to slope stability analysis. It was found that the main causes of landslides were types of soils at the site, high slopes, groundwater recharged from rainfall and changing of weights (cut and fill). Remedy measures were suggested to overcome sliding problem based on available resources and local technology.
Highlights
Landslides occur in many places around the world, especially the mountainous areas
Large settlement occurred in the part of the road under maintenance and more sliding and slope instability occurred in the road at station 2 + 100 during the remedial measures
The main aim of slope stability analysis is to find the slope that have the minimum factor of safety and the force corresponding to this slope
Summary
Landslides occur in many places around the world, especially the mountainous areas. They cause great danger to structures and people close to them. Slides or slopes failure are usually caused by excavation, by undercutting at the foot of an existing slope, by gradual disintegration of the structure of the soil, by an increase of the pore water pressure, or by vibration or shock. Secondary causes, such as earthquakes and excavations near the slope, may trigger and activate landslides, especially in areas that had old landslides [1] [2] [3]. The first signs of landslide are the appearance of surface cracks at the top of the slope perpendicular to sliding movement These cracks are occasionally filled with water that reduce the strength of the soil and increase lateral pressure that causes sliding [1] [3]. This method was suggested based on the existing local technology and due to lack of resources
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