INFLUENCE OF STRUCTURAL-GEOLOGICAL PROPERTIES IN DETERMINATIONOF ENGINEERING-GEOLOGICAL QUASI-HOMOGENEOUS ZONES WITHIN AMONOLITHOLOGICAL ENVIRONMENT AT THE “OTINJA” DAM SITE
DOI:
https://doi.org/10.46763/Keywords:
mapping; discontinuities; cadaster; classification; sclerometer; excavationAbstract
This study presents the results from research of influence of structural-geological properties for defining engineering-geological quasi-homogeneous zones within the monolithological granite environment of the Otinja dam site. For this purpose, a series of field investigations and tests were carried out, which consisted of detailed geological mapping of the foundation pits and core from exploratory boreholes, as well as sclerometer tests of the rock. In addition, cadastres of discontinuities and sclerometer tests were formed. Based on a detailed analysis of obtained data, four quasi-homogeneous zones were distinguished within the granite massif. In addition, the excavation conditions for each of these quasi-homogeneous zones were defined. By preparing engineering-geological maps and profiles, their representation on the surface and in depth was defined. By analyzing fracturing contour diagrams, the influence of dominant fracture systems in different parts of the terrain was determined. It has been concluded that the greatest influence on the fracturing degree is exerted by the faults on the right flank of the dam site, where five different fracturing systems are present. It has also been determined that the degree of fracturing in zones with leucocratic granites is significantly lower.
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