Document Type : Original Research Paper
Authors
Building and Housing Research Center, Dept. of Geotechnic,Tehran, Iran.
Abstract
This paper describes a multidisciplinary approach for evaluation of statically triggered landslide that occurred in Germi, Ardebil province on 1382. With respect to the evidence, no other mass movement was recorded in the adjacent areas despite the geological and geomorphological homogeneity. Field observations indicate that subsurface water level changes are the most important parameter in triggering the landslide. Hence, the study was focused on an analysis of the role of subsurface water level changes in triggering the landslide. The slope inclines steeply at crown and very gentle towards the toe of landslide. Field data dealing with geomorphology, geophysics (vertical electrical sounding or VES) and geotechnics were acquired and analyzed with the service of Rock Work 2004 and Arc GIS softwares in order to investigate the cause effect relationships between water level changes and mass movement. The geophysical survey detected two buried paths on the flanks of landslide and a three layer internal structures composed of surface deposit, natural bed rock and saturated zones. Based on the results, 21 test pits were located and excavated to the depth of hard layer. Representative material of the study area was selected and tested. Based on the lab tests, the slope was analyzed using Slide Software and remedial measures were recommended.
Keywords
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