Scientific Quarterly Journal of Iranian Association of Engineering Geology

Scientific Quarterly Journal of Iranian Association of Engineering Geology

Evaluation of collapsibility of loess deposits of Gharnaveh catchment in north of Kalale, Golestan province

Document Type : Original Article

Authors
Naser Hafezi Moghaddas
Mohammadreza Nikudel 1
Kazem Bahrami 2
1 Assistant professor, Department of Engineering Geology, Tarbiat Modares University, nikudelm@modares.ac.ir
2 . M.Sc. of Engineering Geology from Tarbiat Modares University, Tehran-Iran,
Abstract
In engineering geology, collapsible soils are classified in problematic soil group and could be make serious problems for construction projects, especially in arid and semiarid areas. It also causes intensification of soil erosion and loss of vegetation. One of the major of collapsible soil group is losses deposits which are covered main surface area of Kalale in Golestan Province. This area is undergoing severe erosion in recent years also has experienced several destructive floods. There are a significant number of sinkholes in loess deposits of this area. In this research, to investigate and identify the loess soils characteristics, intact samples were taken and atterberg limits, unit weight, particle-size distribution, specific gravity, and shear strength parameters were determined in laboratory. The collapse potential of these soils was obtained by consolidation test results and based on two criteria of Hindi and Clevenger. The results show that these soils are clay loess with low plasticity index and have a high to medium potential of collapsibility. Also it found that the increased in porosity leading to increasing of collapse, whereas increasing in the activity of clay minerals is leading to decreasing of collaps.
Keywords
Golestan province
Loess
Collapsibility
Consolidation test
Kalale
Subjects
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Scientific Quarterly Journal of Iranian Association of Engineering Geology
Volume 4, Number 1 & 2
September 2011
Pages 39-46

  • Receive Date 26 October 2011
  • Revise Date 19 January 2012
  • Accept Date 22 February 2012