Settlement and Collapse of Gypseous Soils
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Abstract
The work in this research presents an experimental, theoretical and field study in order to investigate the settlement of Gypseous soils and the effect of water percolation on collapsibility of this soil. In this research, more than five sites where chosen to extract the gypseous soil samples with different gypsum content; the sites located in different regions in Salah Aldeen Governorate. In order to estimate the settlement and collapse of gypseous soils, field tests consist of standard penetration test for depths (1m to 5m) for each site and plate load test were conducted in dry and soaked cases.
The results show that the settlement of gypseous soils in dry condition is less than the same soils that have low values of gypsum in its formation, the settlement value of lightly gypseous soils can be evaluated from the basic equations depending on data of SPT.
In soaking case with short term flooding, gypseous soils shows compressible and they are sufficiently reliable soil base, while in the case of long term flooding settlement develops due to dissolution of salts and gypsum. The magnitude and the rate of the settlement depend on initial gypsum content, relative amount of leached salts, the mineralogy and type of soil and soil properties and acting load.
The standard penetration test does not use in calculating the settlement for the soils that have gypsum in its formation in soaking condition.
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References
- N. Janbu, L. Bjerrum, and B. Kjaernsli,
"Methods of Determining Elastic Settlement
under Undrained Conditions" NGI
Publication No. 16 Norwegian Geotechnical
Institute, Oslo, 1956.
- J. H. Schmertmann, "Static Cone to
Compute Static Settlement over Sand",
ASCE Journal of Soil Mechanics &
Foundations Division, 96 (3), pp. 1011-
, 1970
- K. Terzaghi, and R.B. Peck, "Soil Mechanics
in Engineering Practice", John Wiley and
Sons, New York, 512p., 1948.
- R. B. Peck and A. Bazarra, Discussion of
"Settlement of Spread Footings on Sands",
by D’Appolonia and Brisette, Journal of Soil
Mechanics and Foundations Division,
ASCE, 95(3), pp. 905–909, 1969.
- G.G. Meyerhof, "Ultimate Bearing Capacity
of Footing on Sand Layer Overlying Clay".
Canadian Geotechnical Journal, vol. 11, pp.
-229, 1974.
- Z. M. Mansour, Z. Chik, and M. R. Taha,
“On Soil Collapse Potential Evaluation”,
Asian Network for Scientific Information,
Journal of Applied Sciences, Vol.8, No.23,
pp. 4434-4438, 2008.
- H. J. Gibbs, "Properties which Divide Loose
and Dense Uncemented Soils", Earth
Laboratory Report EM-658, Bureau of
Reclamation, U.S. Department of the
Interior, Washington, DC., 1961.
- R.W. Day, “Foundation Engineering
Handbook: Design and Construction with
the 2006 International Building Code”,
McGraw-Hill Companies, New York, 820 p.,
- M. Gunaratne, “The Foundation Engineering Handbook”, Taylor & Francis Group, LLC, New York, 609 p., 2006. DOI: https://doi.org/10.1201/9780203484418
- M. Budhu, “Foundation and Earth Retaining Structure”, John Wiley &Sons., 447p., 2008
- V. N. S. Murthy, “Geotechnical Engineering”, Marcel Dekker, Inc, New York 1029 p, 2006.
- B. M. Das, “Shallow Foundations Bearing Capacity and Settlement”, 2nd Edition, Taylor &Francis Group LLC, London, 325p, 2009.
- G. N. Smith, and I. G. N. Smith, “Elements of Soil Mechanic”, 7th Edition, Black Well Science, London, 494p, 1998.
- R. W. Brown, “Practical Foundation Engineering Handbook”, 2nd Edition, McGraw-Hill, New York. 1152p, 2004.
- J. B. Burland, and M. C. Burbidge, "Settlement of Foundation on Sand and Gravel", Proceeding of the Institute of Civil Engineers, part 1, vol. 78, pp. 1325-1381, 1985. DOI: https://doi.org/10.1680/iicep.1985.1058
- B. M. Das and N. Sivakugan, “Settlements of Shallow Foundations on Granular Soil — an Overview”, International Journal of Geotechnical Engineering, Vol.1, pp.19-29, 2007. DOI: https://doi.org/10.3328/IJGE.2007.01.01.19-29
- S. F. Shawket, “Evaluation of Modulus of Deformation of Cohesive Soil Using The Miniature Dynamic Penetrometer Device”, M.Sc. Thesis, Building and Construction Department, University of Technology, Iraq, 2007
- A. F. Barazanji, “Gypsiferous Soils of Iraq”, Ph.D. Thesis, University of Ghent, Belgium, 1973.
- C. H. Trautmann, and F. H. Kulhawy, "CUFAD – Computer Program for Compression and Uplift Foundation Analysis and Design", Rpt EL-4540 CCM (16), electrical Power Research Inst. Palo Alto 148p, 1987.
- B. M. Das, “Shallow Foundation: Bearing Capacity and Settlement”, 1st Edition, CRC Press LLC, USA., 360p, 1999.