ENGINEERING GEODYNAMIC TYPIFICATION OF A TERRITORY PRONE TO DANGEROUS LANDSLIDES ON THE RIGHT BANK OF THE MALY AJALYK LIMAN
Journal Title: Вісник Одеського національного університету. Географічні та геологічні науки - Year 2014, Vol 19, Issue 3
Abstract
The paper presents the method of engineering geodynamic typification of a territory prone to dangerous landslides. It includes the analysis of the structural and material composition of rocks and instrumental observations of deformation processes on landslide slopes. Based on geological drilling and geodetic observations of surface displacements of rock slopes made between 1981 and 2010, we performed engineering geodynamic typification of a landslide-prone spot of the right bank of the Maly Ajalyk liman (the territory of Odessa Port Plant) and identified potentially high-risk areas associated with modern engineering-geological and geodynamic processes.To identify possible higher-risk areas associated with modern engineering-geological and geodynamic processes, following problems were solved: maps are plotted for the surface relief topography of the main deformable horizon (Meotian deposits), as well as maps of vertical and horizontal displacements of rock slope, also, the data analysis of long-term instrumental observations was made, there were identified spatial patterns of formation and development of deformation processes.The main reason for activation of engineering geodynamic risk zones is the hierarchical block structure of the territory, which is characterized by continuous and differentiated movements of geoblocks of various scales.For areas of high geodynamic risk, the diagonal direction is most characteristic, which is typical of the geological structure of the territory. Closer to the bank of the liman, the diagonal network activity is “suppressed” by the meridian-aligned liman, so higher-risk areas are mostly oriented along the coast.The patterns identified on the territory of Odessa Port Plant are characteristic of the whole Odessa region. A significant role in the formation and dynamics of landslide processes is played by micro-block structure of the geological environment. Its main elements are the inter-block zones, the zones of highest engineering geodynamic risk. Extreme velocity gradients and strains associated with differentiated movements of blocks are typical for such zones. It is those areas that create conditions worsening the stability of slopes. Cartographic modeling results should be considered while developing and designing protective structures (landslide, drainage, etc.).
Authors and Affiliations
Ye. A. Cherkez, V. I. Shmuratko, T. V. Kozlova, E. E. Tchujko
Keywords
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