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Effect of weathering on the geomechanical properties of andesite, Ankara - Turkey
Date
2006-05-01
Author
Orhan, M.
Isik, N. S.
Topal, Tamer
Ozer, M.
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Andesite exposed in different parts of Ankara has different weathering categories varying from fresh to residual soil. The geomechanical properties of the andesite are significantly affected by weathering. Buildings constructed especially in completely weathered and residual soil levels of the andesite have some geotechnical problems. In this study, the variation of the geomechanical properties of the andesite due to weathering is investigated in three selected sites of Ankara, through optical microscope, X-ray diffraction analyses, major element analyses, pressuremeter tests, physicomechanical tests, and seismic refraction method. The data gathered from the field and laboratory studies were used to assess the characteristics of the weathering zones. Based on the data obtained from this study, an idealized weathering profile is assessed. No bearing capacity and consolidation settlement problems exist in the area. However, care should be taken for immediate settlement of the buildings. Slopes with heights less than 8 m are not expected to cause any significant problems for buildings. There exists a ground amplification problem in the study area. The natural period of the building should not match that of the weathered rock. The ground response analyses reveal that the buildings with four to seven stories may be adversely affected from earthquakes due to resonance phenomenon. Therefore, this has to be taken into account when designing new buildings.
Subject Keywords
General Engineering
,
Earth and Planetary Sciences (miscellaneous)
,
Soil Science
,
General Earth and Planetary Sciences
,
Pollution
,
General Environmental Science
,
Water Science and Technology
,
Environmental Chemistry
URI
https://hdl.handle.net/11511/35310
Journal
ENVIRONMENTAL GEOLOGY
DOI
https://doi.org/10.1007/s00254-006-0189-1
Collections
Department of Geological Engineering, Article
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M. Orhan, N. S. Isik, T. Topal, and M. Ozer, “Effect of weathering on the geomechanical properties of andesite, Ankara - Turkey,”
ENVIRONMENTAL GEOLOGY
, pp. 85–100, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35310.