On the Landslide of Daigala Slope-Kurdistan-Iraq

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2014 by IJETT Journal
Volume-12 Number-10
Year of Publication : 2014
Authors : Assist. Prof. Dr. Hamed M. Jassim , Dr. Zahra’a Noori Rasheed , M.Sc. Bahra Dhahir Ghafour , Dr. Faris Rashied Ahmed
  10.14445/22315381/IJETT-V12P294

Citation 

Assist. Prof. Dr. Hamed M. Jassim , Dr. Zahra’a Noori Rasheed , M.Sc. Bahra Dhahir Ghafour , Dr. Faris Rashied Ahmed. "On the Landslide of Daigala Slope-Kurdistan-Iraq", International Journal of Engineering Trends and Technology (IJETT), V12(10),503-509 June 2014. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract

The strategic two-lane road (Erbil – Koya) is the main link between Erbil and Suleymaniya governorates. It passes through Daigala bridge whose edge from Koya side is adjacent to a curved section which experienced a slope failure (Fig. 1) in the form of rotational sliding which progressed into a slump failure through the mechanism of “progressive failure” after the overburden soil and sediments were fully saturated with water due to some heavy rain storms which happened at the end of January 2013 leading to the loss of cohesive force and triggering that failure which was developed into a progressive failure by the action of additional loading which was imposed by the heavy traffic of big oil tankers which were running on the adjacent paved road. The research team tried to study and analyze this failure by collecting some soil samples (both disturbed and disturbed) from the study area and performing different laboratory tests in addition to some in-situ field tests by using the “Inspection Vane Tester, H – 60” for the purpose of enabling this study and analysis. The location of the study area was described and illustrated by providing a location map and the geological settings were explained. As a theoretical background, the different modes of soil slopes failures and their conditions were presented. At the end, some conclusions of this study were outlined and few recommendations for future remedial measures were eventually made.

References

[1] Said, K. T., A Regional study on Koya District, Unpublished M.Sc. Thesis, University of Koya, Kurdistan-Iraq, 285 p. , 2006.
[2] Al-Kadhimi, J. A. M. , Sissakian, V. K. , Satter, A. F. and Diekran, D. B. , Tectonic map of Iraq, 1:1000,000, 2nd. Edn. , GEOSURV. , Baghdad, Iraq, 1996.
[3] Pezham, M. R., Jafari, M., Shariat, Feiznia, S. , Ahmadi, H. , A Statistical approach for logical modeling of landslide hazard zonation, 8th. International IAEG Congress, Balkema, Rotterdam, pp. 965-969, 1998.
[4] Bellen, V. R. C., Dunnington, H. V. , Wetzel, R. , and Morton, D. M. , Laxique Stratigraphique International, FASC. 10a, Iraq, Paris, 333 p. , 1959.
[5] (Nelson, S. A., Mass wasting and mass wasting processes, http://www.tulane.edu/sanelsone/geol 111/mass wasting.htm , 2002.
[6] Ghafour, D. B., Slope stability analysis along (Kirkuk – Koya) main road, Kurdistan Region-Iraq, M.Sc. Thesis, Koya University, Faculty of Engineering, 158 p. , 2008.
[7] Al-Saadi, S. N. And Al-Jassar, S. H. , Rock slides along Haibat Sultan area, N. Iraq, 3rd. International Conference on case histories in Geotechnical Engineering, St. Louis, Missouri, pp. 443-450, 1993.
[8] Omer, H. M. A., Primary geotechnical assessment of Haibat Sultan Area and its suitability for proposed tunnel construction, M.Sc. Thesis, Koya University/ Faculty of Engineering, 2009 .
[9] Yilmazer, I., Geological and geotechnical review of Haibat Sultan Mountain crossing, AGS. Engineering Construction and Trading Company, 45 p., 2003.
[10] Hoek, E., Bray, J. W., Rock Slope Engineering, Revised Third Edn. , Institution of Mining & Metallurgy, London, 358 p., 1981.
[11] Murthy V. N. S., Geotechnical engineering, principles and practice of soil mechanics and foundation engineering, Marchel Dekker Inc., 2005.
[12] Shenpage R. Kaniraj, Design Aids in Soil Mechanics and Foundation Engineering, McGraw Hill, 2008.
[13] Braja M. Das, Soil Mechanics Laboratory Manual, Sixth Edition, New York, Oxford, Oxford University Press, 2002.

References
Rotational sliding, slump failure, landslide, slope stability, cohesion, angle of internal friction, progressive failure, factor of safety, Atterberg limits.