یافته‌های نوین زمین‌شناسی کاربردی

یافته‌های نوین زمین‌شناسی کاربردی

توسعه معادلات تجربی بین مقاومت فشاری تک­ محوری و مقاومت کششی برزیلین برای سنگ‌های مختلف: یک مطالعه مروری

نویسندگان
1 دانشیار گروه زمین‌شناسی، دانشکده علوم، دانشگاه لرستان، خرم‌آباد، ایران
2 گروه زمین‌شناسی مهندسی، مؤسسه فناوری، علم و پایایی، دانشگاه فدراسیون، بالارات 3350، وی آی سی، استرالیا
چکیده
مقاومت فشاری تک­محوری سنگ­ها یکی از پارامترهای حیاتی در طراحی سازه­های ژئوتکنیکی مختلف، مانند ترانشه راه، سد، تونل و نیروگاه است. در مراحل مقدماتی بررسی ساختگاه یک سازه ژئوتکنیکی، معمولاً از روش­های غیرمستقیم برای ارزیابی مقاومت فشاری تک­محوری سنگ­ها استفاده می­شود. یکی از روش­های غیرمستقیم، استفاده از مقاومت کششی برزیلین برای برآورد مقاومت فشاری تک­محوری از طریق معادلات تجربی است. در مقاله فعلی، یک بانک اطلاعاتی جامع با گرد­آوری بیش از 1803 داده مربوط به انواع سنگ­های مختلف آذرین، رسوبی و دگرگونی ایجاد و بر اساس آن معادلات تجربی برآورد کننده مقاومت فشاری تک­محوری از مقاومت کششی برزیلین توسعه داده شده­اند. در ادامه، دقت معادلات تجربی برای انواع سنگ­های مختلف از طریق شاخص­های آماری ضریب همبستگی (R) و ارزش حسابی (VAF) مورد بررسی و مقایسه قرار گرفته­اند. نتایج حاکی از آن است که معادلات تجربی برآورد‌کننده مقاومت فشاری تک­محوری برای سنگ­های آذرین دارای بالاترین دقت هستند و در رتبه­های بعدی، به ترتیب سنگ­های رسوبی و سنگ­های دگرگونی قرار دارند. به‌عنوان تابعی از نوع سنگ، برخی معادلات تجربی دقت بالا و برخی دقت متوسط در برآورد مقاومت فشاری تک­محوری داشته­اند. معادلات تجربی توسعه داده شده در مطالعه حاضر می­توانند به‌عنوان یک منبع جامع برای کارشناسان و مهندسان اجرایی سازه­های ژئوتکنیکی مورد استفاده قرار گیرند. این امر منجر به کاهش زمان و هزینه ارزیابی مقاومت فشاری تک­محوری در مراحل مقدماتی بررسی ساختگاه یک سازه ژئوتکنیکی ­خواهد شد.
کلیدواژه‌ها

عنوان مقاله English

Development of empirical equations between uniaxial compressive strength and Brazilian tensile strength for various rocks: A review study

نویسندگان English

Amin Jamshidi 1
Saeed Aligholi 2
1 Assoc. Prof., Dept. of Geology, Faculty of Sciences, Lorestan University, Khorramabad, Iran
2 Dept. of Engineering Geology, Institute of Innovation, Science and Sustainability, Federation University, Ballarat 3350, VIC, Australia 3350, VIC, Australia
چکیده English

In the present study, a comprehensive database has been created by collecting more than 1803 data related to various rocks types including igneous, sedimentary, and metamorphic, and based on that, empirical equations for predicting the uniaxial compressive strength from Brazilian tensile strength were established. In the following, the accuracy of empirical equations for rocks types were investigated and compared by the statistical indices of correlation coefficient (R) and variance accounted for (VAF). The findings indicate that the predictive empirical equations of the uniaxial compressive strength developed for igneous rocks have the highest accuracy, and sedimentary and metamorphic rocks are in the next ranks, respectively. The empirical equations developed in the present study can be used as a comprehensive database for the experts and executive engineers of geotechnical structures. This will lead to the reduction of time and cost to evaluate the uniaxial compressive strength in the preliminary steps of the investigation site of a geotechnical structure.

کلیدواژه‌ها English

Empirical equations
Prediction
Rock
Brazilian tensile strength
Uniaxial compressive strength
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  • تاریخ دریافت 17 شهریور 1403
  • تاریخ بازنگری 23 آبان 1403
  • تاریخ پذیرش 09 دی 1403