کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4728162 1640184 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of input parameters regarding rock mass in analytical solution and numerical modelling
ترجمه فارسی عنوان
مقایسه پارامترهای ورودی توده سنگی در راه حلهای تحلیلی و مدلسازی عددی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
چکیده انگلیسی


• The rock mass properties were determined by using Hoek-Brown failure criterion.
• The elasticity modulus was evaluated by RMR89.
• The rock mass was evaluated by numerical analyses using FDM.
• The results obtained from numerical analyses and analytical methods were compared each other.

Characteristics of stress redistribution around a tunnel excavated in rock are of prime importance for an efficient tunnelling operation and maintaining stability. As it is a well known fact that rock mass properties are the most important factors affecting stability together with in-situ stress field and tunnel geometry. Induced stresses and resultant deformation around a tunnel can be approximated by means of analytical solutions and application of numerical modelling. However, success of these methods depends on assumptions and input parameters which must be representative for the rock mass. However, mechanical properties of intact rock can be found by laboratory testing. The aim of this paper is to demonstrate the importance of proper representation of rock mass properties as input data for analytical solution and numerical modelling. For this purpose, intact rock data were converted into rock mass data by using the Hoek-Brown failure criterion and empirical relations. Stress-deformation analyses together with yield zone thickness determination have been carried out by using analytical solutions and numerical analyses by using FLAC3D programme. Analyses results have indicated that incomplete and incorrect design causes stability and economic problems in the tunnel. For this reason during the tunnel design analytical data and rock mass data should be used together. In addition, this study was carried out to prove theoretically that numerical modelling results should be applied to the tunnel design for the stability and for the economy of the support.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of African Earth Sciences - Volume 124, December 2016, Pages 497–504
نویسندگان
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