Identification of Gediminas Hill possible landslides formations zones

Abstract

Active geological processes are still observed on the slopes of Gediminas Hill. These processes lead to shallow landslides which are forming in Holocene technogenic soils (t IV). The history of technogenic soils appearance and their thickness on the Gediminas Hill surface is diverse. The main Gediminas Hill soil formation and surface changes during the Gediminas Upper and Lower castle construction periods are presented in this manuscript. According to currently existing Gediminas Hill engineering geological and geotechnical conditions and data on the constructions investigations the numerical 3D finite element model was prepared. This model includes geological layers and all constructions (including also tunnels). Due to the huge number of finite elements, numerical simulations were realized in a private Vilnius Gediminas Technical University cloud. Cloud services were chosen to quickly respond to changing needs of computing resource which demands calculations capacity up to 1015 GB RAM. According to prepared numerical 3D model the possible shallow landslides areas were found. Identified areas correlate with data on the slopes displacements measurements. Numerical 3D model allows to make a prognosis of possible shallow landslides formation.