Assessment of structural sensitivity of Kerman City deposits

Document Type : Research Paper

Authors

1 Department of Geology and Engineering Geology, Ferdowsi University of Mashhad, Mashhad, Iran.

2 Department of Geology and Engineering Geology, Ferdowsi University of Mashhad, Mashhad, Iran

10.7508/GEOP.2015.01.005

Abstract

This research was performed to determine the efficiency effect of sedimentary environment of Kerman City area on soil structure by
comparing natural and reconstituted consolidation curves. In this regard, four different criteria such as sensitivity strength, stress
sensitivity, Schmertman criteria and the result of the uniaxial compression test were used. The base of these criteria is to compare the
results of natural and undisturbed soil consolidation tests. The position of undrained shear strength of Kerman City soils in Iv-Su space
was located on the left side of the intrinsic strength line and this confirms that the stress sensitivity of soils is less than the unit.
Therefore, the soils in the city subzone are mostly over consolidated, and cementation and chemical bonds have not developed. The
swelling sensitivity of fine grained soils based on Schmertman criteria are often less than 2 or slightly larger than 2.5 indicating that the
soils of Kerman City subzones have underdeveloped swelling sensitivity due to poor cementation.

Keywords


Article Title [Persian]

بررسی حساسیت ساختاری نهشته های شهر کرمان

Authors [Persian]

  • محمدرضا امینی زاده 1
  • ایمان آقاملایی 2
  • غلامرضا لشکری پور 2
  • محمد غفوری 2
Amirsoleymani, T., 1994. Deposition and behavior of partially saturated silt.Proc. of 1st International Symposium on
Engineering Characteristics of Arid Soils, London, pp. 207-214.
Amirsoleymani, T., 1995. Influence of deposition on deformation of Unsaturated Soils. .Proc. of the first International
Conference on unsaturated soils, 2: 687-694.
Asghari, A., 2002. Effects of cementation on the shear strength and deformability Tehran coarse grain soils. PhD thesis,
Department of Geology, Faculty of Sciences, Tarbiat Modarres University, 252pp.
Barański, M., 2008. Engineering-geological properties of normally consolidated tills from Płock area. Geologija Vilnius.
50: 40-48.
Boruvka, L., Valla, M., Donatova, H., Nemecek, K., 2002. Vulnerability of soil aggregates in relation to soil properties,
Rostlinna Vyroba, 48: 328-329.
Bujang, B.K., Huat, S.M., Thamer, A.M., 2005. Effect of chemical admixtures on the engineering properties of tropical
peat soils. American Journal of Applied Sciences, 2: 1113-1120.
Burland, J. B., 1990. On the compressibility and shear strength of natural clays Geotechnique, 40: 329-378.
Chandler, R.J., 2000. Clay sediments in depositional basins: the Geotechnical cycle, Quaterly Journal of Engineering
Geology and Hydrology, 33: 7-39.
Cotecchia, F., Chandler, R.J. 1997. The influence of structure on the prefailure behaviour of a natural clay Géotechnique,
47: 523-544.
Cotecchia, F., Chandler, R.J., 2000. A general framework for the mechanical behaviour of clay Géotechnique, 50: 431-
447.
Gens, A., Nova, R., 1993. Conceptual bases for a constitutive model for bonded soils and weak rocks, Proc. Int. Symp. on
Geotech. Engere. of Hard Soils-Soft Rock, the Netherlands, and Balkema, Rotterdam.1: 485-494.
Heidari, M., 2001. The relationship between mechanical properties and structure offine-grained soils of southern Tehran,
PhD thesis, Engineering Geology, Faculty of Sciences, Tarbiat Modarres University, 310pp.
Nihan, S.I., 2009.Estimation of swell index of fine grained soils using regression equations and artificial neural networks,
Scientific Research and Essay. 4: 1047-1056.
Pfleiderer, S., Hofmann, T., Auer, J., 2005. Geological interpretation of geotechnical properties of sediments in Vienna
basin, Geophysical Reserch Abstracts.
Qajar, M.H., Nazemzadeh, M., Azizan, H., Rowshanravan, J., 1996. The history of Kerman Basin during the Neogene and
Quaternary, GSI, Regional Center for S.E. Iran (Kerman), 74 pp.
Schmertmann, J.H., 1969. Swell sensitivity, Geotechnique. 19: 530-533.
Selley, R. C., 1996. Ancient sedimentary environments and their sub-surface diagnosis, 4th ed.
Skempton, A.W., 1970. The consolidation of clays by gravitational compaction. Q. J. Geological Soc. 125: 373-411.
Viton, C., Cotecchia, F., 2010. On the geotechnical characterization of a stiff medium fissured clay from Italy, 21st Alert
Geomaterials Workshop, Aussois, 4-6 October, Technical University of Bari, Italy.