Akademik Veri Yönetim Sistemi
PAMUKKALE UNIVERSITY JOURNAL OF ENGINEERING SCIENCES-PAMUKKALE UNIVERSITESI MUHENDISLIK BILIMLERI DERGISI, cilt.22, sa.6, ss.538-545, 2016 (ESCI)
Oltu-Narman Basin (Erzurum) is a Tertiary depositional area, located on the central segment of the North East Anatolian Fault Zone (NEFZ), one of the most active seismotectonic belt of Eastern Anatolia. The Upper Cretaceous volcano-sedimentary sequence and the Eocene flysch and ophiolitic complex constitute basement of the basin. The basin consists of Oligocene lower upper sedimentary units volcanic rocks and upper sedimentary units. The lower sedimentary unit consists of conglomerate, sandstone, silt-clay layers and gypsum-limestone band. The volcanic unit is generally comprise with pyroclastics, mainly agglomerates, tuff and ignimbrite where emplaced on lower sedimentary unit conformably. The lower sedimentary unit and the upper sedimentary unit shows similar lithological characters. However, this unit has high clay content. In addition, the basin is located in the quaternary alluvial deposits. Oltu (Erzurum) residential area lies parallel to the Oltu River on northeast-southwest direction along both sides of the Oltu River. Oltu Residential areas with continuing constructions have been located on the lower sedimentary unit, the old alluvial deposits and new alluvial deposits. Research area separated four (4) distinct geotechnical zones. The geotechnic parameters of each zone are interpreted and evaluated in terms of urban planning and housing for the purpose of seismic hazard reduction. Nine (9) sampling point, twelve (12) borehole and twenty four (24) research pit was opened on the basis of general geological context of the Oltu (Erzurum) urban and vicinity area. Geotechnical mapping has been drawn by considering on the horizontal and vertical changes of physical and mechanical properties of each soil samples, the hydrogeological conditions, topographic characteristics and the seismicity of the region.