The examination of effect of salt water on mechanical properties clay soil around the dam Gotvand using response surface metod (RSM)

  • سال انتشار: 1394
  • محل انتشار: اولین کنگره بین المللی زمین، فضا و انرژی پاک
  • کد COI اختصاصی: ATTITTDE01_238
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 642
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نویسندگان

Mohammad Ajam

1M.Sc. of Civil & Environmental Engineering, K.N.Toosi University of Technology

Mohammad Reza Sabour

2Associate Professor of Civil & Environmental Engineering Faculty, K.N.Toosi University of Technology, Tehran, Iran

Gorban Ali Dezvareh

Ph. D. Candidate of Civil & Environmental Engineering, K.N.Toosi University of Technology, Tehran, Iran

چکیده

Specifying the mechanical characteristics of soil is as one of the major steps in designing the foundation for civil projects, particularly hydraulic structures. This study examines the water salinity effect on engineering characteristics of fine-grained soil in clayey core of Gotvand dam which it is located on the Karun River in Khuzestan province, Iran. For this purpose, three types of salt; sodium chloride, magnesium chloride and calcium sulfate is considered that the last one has the highest concentration in the water of reservoir behind the dam, and then their effect on the mechanical characteristics of clay including density, angel of internal friction, adhesion and open inflation have examined. Therefore, treatments required for testing were provided by combining the mentioned salts considering the weight percentage of salt in the water behind the dam and designing a test using response surface methodology. The results were statistically analyzed by RSM. Results showed that type and amount of soil salinity has no significant impact on the compaction characteristics of soil namely optimum moisture content and the maximum dry density. Eventually, results of open inflation showed that whatever the salt concentration be higher, the rate of sample's open inflation will be lower. Results of changes in the angle of internal friction indicate that at first this parameter decreases and then it increases. Studies on the soil adhesion show that at first this parameter increases but eventually it decreases. In the open inflation test, whatever the salt concentration is higher, the amount of sample's open inflation will be lower.

کلیدواژه ها

Gotvand dam, Water salinity and soil, Density characteristics, triaxial test, RSM

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