Geophysical and Geotechnical Studies for Electric Power Plants Project at the Sakarya River Zone, Turkey
Öz
Geophysical and geotechnical studies were conducted at a proposed hydroelectric power plants facility at a site north of Sakarya river D100(E-5) bridge in Adapazarı town of Sakarya city in Turkey. The study is aimed at evaluating the competence of the near surface formation as foundation materials. Geophysical and geotechnical methods of investigation were adopted. The geophysical investigation involved the Vertical Electrical Sounding (VES) technique using the Schlumberger configuration, seismic refraction and geotechnical investigative methods comprised of boreholes to 40 m depth with Standard Penetrating Testing (SPT) and undisturbed Shelby tube, disturbed Split Spoon soil sampling, triaxial compresssion and consolidation tests.
A total of five Vertical Electrical Soundings (VES) and five seismic refraction profiles from different location within the study area were used for the study. Water content, plasticity, and grain size distribution characteristics are obtained from laboratory testing leading to a classification of soils using the Unified Classification System.
The geophysical results revealed three distinct
geoelectric sequences which comprises of topsoil, weathered and partially
weathered layers. The topsoils composed of clay/silt/sand while the weathered
layer composed of silty sand. The partially weathered layer is formed of silty
clay. The geotechnical results show that the partly weathered layer has
relatively high clay content. Based on the consistency limits of the soils
within the area, the soil generally indicate firm plasticity, hence, the soils
are expected to exhibit medium swelling potential. There is no evident of
geological feature such as fracture/fault within the subsoil in the area.
Anahtar Kelimeler
References
- Akintorinwa OJ, Adeusi FA (2009) Integration of geophysical and geotechnical investigation for a proposed lecture room complex at the Federal University of Technology, Akure, SW, Nigeria, Journal of Applied Science 2(3), 2009. 241-254
- ASTM, American Society for Testing and Material (1985) Annual Book of ASTM Standards Soil and Rock, Building Stones, Section-4, Construction, V.04.08, ASTM Publication, 972, 166–194
- Bozkurt A, Kurtulus C (2009) Integrated geological, geophysical and geotechnical exploration for site characterization in Alikahya region, (NW Turkey), Uygulamali Yerbilimleri Dergisi, sayı, C8, 1-17
- Gibbs HJ, Holtz WG (1957) Identification and Classification of Soils An Appraisal, and Statement of Principles ASTM-STP 113 American Soc. for Test and Mat Philadelphia 3-24, 85-91
- Gutenberg B, Richter CF (1944) Frequency of earthquakes in California. Bull. Seismol. Soc. Amer, 34, 185–188
- Ishomoto, M., Lida, K., 1939. Observations of earthquakes registered with the micro- seismograph constructed recently. Bulletin of the Earthquake Research Institute 17, 443–478.
- Kurtulus C, Bozkurt A, Endes H, Alkan MA (2010) Engineering and physical characteristics of the Akveren formation, NW of Turkey, 14 ECEE, 1, 645
- Leonards GA (1962) Foundation Engineering Mc. Graw-Hill Book Company 11363 NewYork USA 3-24, 85-91
Details
Primary Language
Turkish
Subjects
Geological Sciences and Engineering (Other)
Journal Section
Research Article
Publication Date
December 30, 2017
Submission Date
February 23, 2017
Acceptance Date
May 30, 2017
Published in Issue
Year 2017 Volume: 16 Number: 2