Archive Information Extraction for Ground Conditions Assessment
Archive Information Extraction for Ground Conditions Assessment

Author(s): Boyko Ranguelov, Atanas Kisyov, Stefan Dimovski, Nikolai Stoyanov, Maya Tomova, Christian Tzankov, Bojourka Georgieva, Stoyan Christov, Stoyan Christov, Dimcho Solakov, Dragomir Gospodinov, Edelvays Spassov, Bogdana Milenkovich, Orlin Dimitrov
Subject(s): Social Sciences, Library and Information Science, Archiving, Sociology, Human Ecology, Environmental interactions
Published by: Национално издателство за образование и наука „Аз-буки“
Keywords: ground conditions; archive information; methodology
Summary/Abstract: This paper is targeted to the development of methodology, data sources and extraction from the archives of the parameters considering the soil ground conditions. The integral parameter reflecting the properties of the surface ground layers is so called Vs_30. This parameter is an integral characteristic of the ground conditions used in almost all procedures of the seismic hazard mapping software. The Vs_30 means the velocity of the transverse seismic waves to the depths of 30 meters of the ground layers. The transverse seismic waves (S-waves) are the most destructive component of any seismic influence. This parameter depends on many factors such as density and type of rocks and sediments of the surface earth’s strata, surface water level, the strength of the medium, etc. The main task – archive information extracted from old data sources - is solved for different geophysical parameters of the ground – rock composition, depth distribution of the different layers, density, porosity, water saturation and many others characterizing the first 30 meters of depth. The physical properties can be obtained by different geophysical methods, frequently used for completely diverse tasks, not related to the needed physical properties. The data collection can be done by in situ measurements, boreholes sampling, lab tests, etc. Due to the recent complicated densely populated areas in the large communities, very frequently such investigations are not possible due to the complicated conditions – buildings, stock, noisy environment, etc. Thus, the main sources of information are the old archives. Examples of the solutions are presented.

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