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European Online Journal of Natural and Social Sciences: Proceedings

Geo-mechanical Consideration in Research Project of Constructing Sheikh Besharat Dam in Bijar County with Gamma-Gamma Methods

Hamid Kaykhah

Abstract


Undoubtedly, preliminary geological studies are among the most important and most fundamental principles of designing and constructing big constructions such as dams in different regions. As a comprehensive template, geo-mechanical studies related to geological studies have been able to provide invaluable information regarding surface properties and features of soil such as texture and structure, and permeability. Different methodologies have been exploited in estimating geo-mechanical studies, among most novel of them is gamma-gamma method. This study, in a practical way, conducts a geo-mechanical consideration in research project of constructing Sheikh Besharat Dam in Bijar County with gamma-gamma methods. Results of the study showed that in two tests, a total of 12 experiments has been performed in soil depths ranging from 0.075 m to 35 m which showed that except experiment 9 in test 1 and test 2 in experiment 2 where porosity level is more than other tests, porosity level in other considered tests and regions have been in levels close to one another.  Density level of each of tests taken from 12 points in dam construction lands showed that this has been reported normal for 12 test cases, which is quite similar and close to normal conditions.  Considering Young’s modulus that has been performed based on gamma-gamma methods and data resulting thereof, we showed that the amount of reflection of geo-mechanical properties based on the obtained level of transparency between 550 and 1000 has been identified to be appropriate.


Keywords


dam, gamma-gamma, density, geo-mechanical properties, porosity level

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