GEOTECHNICAL ANALYSIS OF THE LANDSLIDES DEVELOPING IN THE URBAN USAGE AREA: CASE STUDY KIRKDEGIRMENLER (ERZURUM)


ÇAKICI H., TÜDEŞ Ş. , Bulut F.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.27, sa.4, ss.739-751, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 27 Konu: 4
  • Basım Tarihi: 2012
  • Dergi Adı: JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
  • Sayfa Sayıları: ss.739-751

Özet

The mass movements developed at urban settlement areas are substantial georisks for the population by giving way to loss of lives and material damages. For this reason active and passive landslide areas should be defined and necessary measures should be taken by realizing geotechnical analysis and stability analysis of the areas. For landslide-prone areas, construction and housing should not be allowed except for the land-use purposes of open and green space. In this context, the researches and stability analysis have been made in terms of geotechnical points at the potential and active landslide areas at Kirkdegirmenler Mahallesi in Erxurum province. By making engineering geology map in 1/10.000 scale of an area of 20 km(2) at the reasearch area and surrounding it the engeering characteristics of the outcropped units have been defined. Topographical maps in 1/1000 scale of the slopes on which the landslides No. K1, K2, K3 and K4 have been developped and by processing the geological units on the map the geological sections have been made. By laboratory tests that have been made on the samples taken from the land the physical and mechanical characteristics of the slope rubble, effective internal friction angle (phi') 37.5 degrees-42.5 degrees, effective cohesion (c') 0.1-0.38 kg/cm(2), maximum dry unit weight 1.67-2.05 g/cm(3), saturated unit weight 1.90-2.23 g/cm(3), natural unit weight 1.66-2.05 g/cm(3), dry unit weight 1.57-2.0 g/cm(3), specific gravity of solids (gamma(s)) 2.37-2.60 g/cm(3), permeability coefficient 2x10(-4)-3.1x10(-4) cm/s have been defined and grain size distribution tests have been made as well. By way of Fellenius, Bishop, Janbu and Hoek-Bray methods, safety coefficient has been defined by using geotechnical characteristics of the materials according to the testing sliding surfaces and according to the values calculated the slopes no K1, K2 and K4 have been fixed as unstable and the slope no K3 been stable.