Abstract
We present the assessment of a landslide that took place in the Erzurum ski-jumping complex constructed for the 2011 Winter Universiade in Turkey. The lower part of the ski jumps collapsed. Three of the jumps were completely destroyed whilst the two larger jumps were severely damaged. To begin with, the collapsed ski-jumping complex was inspected immediately and periodically after the landslide. Thereafter, the related projects and site investigation report were obtained and examined in detail. Since the report for the site was found to be insufficient, additional in-situ and laboratory tests were planned and carried out to better understand the geotechnical characterization of the site and compensate for the absence of data needed for the related geotechnical analyses. Furthermore, the detailed slope stability analyses under different conditions regarding various factors were conducted. All these studies revealed that the landslide was not sudden but went through a creeping process. The collapse of ski-runs in the landslide was due to the inadequate geotechnical investigation and engineering judgment, design and application mistakes and the lack of stability analyses and supervision.
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