Study of Behavior of Calcareous Soils and Sediments

سال انتشار: 1383
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,667

فایل این مقاله در 9 صفحه با فرمت PDF قابل دریافت می باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

ICOPMAS06_092

تاریخ نمایه سازی: 5 آذر 1384

چکیده مقاله:

Calcareous sands are accumulations of pieces of carbonate materials, usually derived from reworked shell fragments and skeletal debris of minute life. Several factors affect the qualities of calcareous sediments, such as: grain type and size, cementation, pore spaces, environmental conditions, etc. Although, geotechnical engineers have been conducting extensive research on calcareous materials lately, however, they don’t agree on the appropriate field and laboratory investigation procedures and important parameters necessary to characterize them. The traditional practice successfully used for other types of materials will be ineffective for these deposits. This results in a bad understanding of these materials, leading to many problems in practice. The mechanical behavior of calcareous and carbonaceous soils and sediments mainly differ from those of terrigenous deposits or other types such as quartz sands or siliceous sediments. Experiences show that the application of engineering loads within the normal range causes calcareous soil structures to collapse and grains to crush, when for example, conventional pile design theory and experience rely on data developed from terrestrial sediments where particles are not crushed. The crushing characteristics of calcareous soils are very important in defining foundation resistance. In Addition, overburden has very little influence on offshore calcareous sands in different manner with quartz sands. Therefore, conventional soil mechanics theories should not be directly applied to such cases.The aim of this paper is to illustrate key recommendations for predictions of the behavior of calcareous and carbonaceous soils and sediments when encountered, especially in coastal and offshore areas. This has been achieved by collecting and using valuable results of different tests.

کلیدواژه ها:

نویسندگان

M. Ghazavi

Assistant Professor, Civil Engineering Department, K.N.T. University of Technology, Tehran, Iran

S.A. Haghshenas

MSC in Marine Structural Engineering, Civil Engineering Department, K.N.T. University of Technology, Tehran, Iran

A. Ajamy

MSC in Earthquake Engineering, Civil Engineering Department, K.N.T. University of Technology, Tehran, Iran

مراجع و منابع این مقاله:

لیست زیر مراجع و منابع استفاده شده در این مقاله را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود مقاله لینک شده اند :
  • -place Treatment of Foundation Soils.?* J. Soil Mech. Found. Div., ...
  • Al-Amoudi, O. S. B., and Abduljauwad, S. N. 1995.، _ ...
  • Al-Shafei, K. A., ed. 1999. Proc., 2nd Int. Conf. on ...
  • Alarcon- Guzman, A., Leonards, G. A., and Chameau, J. L. ...
  • Fatigue of Compo sites-fatigue Modulus Concept and Life ن .1986 ...
  • Hyde, A. F. L., and Ward, S. J., 1985., _ ...
  • Ismail, M.A., Joer; H.A., Sim; W.H., and. Randolph, M.F.، Effect ...
  • Jewell, R. J., and Andrews, D. C., eds. 1988. Proc., ...
  • Konrad, J.-M. 1993.، Undrained Response of Loosely Compacted Sands During ...
  • Mohamad, R.., and Dobry, R. 1986.، Undrained Monotonic and Cyclic ...
  • Poulos, S. J., Castro, G., and France, J. W. 1985. ...
  • of Stiffness of Cemented Calcareous Soil in Degradation؛ Sharma, S., ...
  • Sharma, _ and Fahey, M., 2003b, ، Evaluation of Cyclic ...
  • Sladen, J. A., D'Hollander, R. D., and Krahn, J. 1985, ...
  • Wij ewickreme, D., and Vaid, Y. P., 1988., ،4Behavior of ...
  • نمایش کامل مراجع