Scientific Quarterly Journal of Iranian Association of Engineering Geology

Scientific Quarterly Journal of Iranian Association of Engineering Geology

ارائه مدل تجربی جدید برای تخمین مدول دگرشکل پذیری توده سنگ (مطالعه موردی: سد خرسان 2)

Document Type : Original Article

Authors
Somaye Karimdoost 1
Hamid Mehrnahad 2
Hamidreza Nejati 3
1 MSc Engineering Geology;Yazd University
2 Associate professor of Civil Engineering;Yazd University
3    Rock Mechanics Division, Tarbiat Modares University, Tehran, Iran, h.nejati@modares.ac.ir
Abstract
Deformability of Rock mass is used in many rock constructions such as foundations and underground excavations. Determining this feature is one of the trending fields in geological engineering. Rock discontinuities have been known as an important factor affecting deformability modulus. Methods for determining deformability modulus are usually expensive and very time-consuming, hence the goal is to estimate deformability module using some indirect methods and many efforts have been done in this area so far.
Mass classification systems have been used for deformability module estimation. In this study, a relationship is presented to estimate deformability module using geomechanical parameters of rock. First, dilatometer tests have been done over 88 samples taken from Khersan dam and Statistical studies carried out on these data. Common statistical indices were used in order to choose a proper regression model. Finally using multivariate regression, an equation including geomechanical parameters of the rock mass and dynamic elastic modulus, with the determination coefficient of as high as 0.865, developed for estimation of deformability modulus.
Keywords
Deformability
Statistical studies
multiple regression
Subjects
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Scientific Quarterly Journal of Iranian Association of Engineering Geology
Volume 10, Number 3 & 4
March 2018
Pages 43-53

  • Receive Date 29 November 2017
  • Revise Date 20 March 2018
  • Accept Date 16 April 2018