This menu describes natural factors that influence soils and other factors that may have an effect on seismic resistance of buildings.
1. Engineering-Geological map: Overall information regarding engineering-geological maps is arranged in the following types of files:
2. Hydrogeological Map: The map describes areas where depth of water occurrence lies at 0-2m, 2-5m, 5-10m and 10-20m. Areas which are less examined, the intervals have been set at 0-10m and 10-20m. Data in Hydrogeological map has been compiled in the files of digital code contours of the areas. The areas are represented as graphical objects characterized by the following attributes: depth of water occurrence and the code of sign, which corresponds to the depth of occurrence. Also a legend file is developed, which shows the depth occurrence of underground waters. View screenshot.
3. Seismic Microzoning Map: Seismic microzoning is designed for estimating the seismic influence on buildings and installations. Here it is necessary to estimate the factor of soil properties of buildings' and installations' basements for forecasting the outcomes of scenario earthquakes. The seismic database was developed based on 1:10000 scale map of S. Pirusyan and S. Simonyan. The map shows the areas that have 8, 9 and 10 magnitude seismic resistance and areas not suitable for construction. The 8 magnitude areas are basalts, monolith tuffs with 6-8m+ thickness and sandy loams with less than 2-5m thickness. 9 magnitude areas are gypsiferous colored clay and hrazdan soils, soils that include sandy loams, sands, loams, loose tuffs and coarse waste soils with 2-5m thickness. 10 magnitude areas are subsidence soils, sandy loams, volcanic sands with 6-10 thickness, water-saturated loams and dusty sands. Sandy loam areas having thickness of more than 8m and areas where hazardous processes (taluses, landslides, failures, etc.) occur are considered as not suitable for construction. Areas of dumps, quarries, wastes, natural steep slopes with angle of more than 15. View screenshot.
4. Relief Map: Digital relief map of Yerevan is based on topographic paper map, scale 1:10000 and consists of digital contour lines. Each contour line is presented by array of dots. Each dot is described by two coordinates and its height.
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