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http://dx.doi.org/10.12989/sem.2019.71.1.077

Interaction between two neighboring tunnel using PFC2D  

Sarfarazi, V. (Department of Mining Engineering, Hamedan University of Technology)
Haeri, Hadi (Department of Civil Engineering, Malard Branch, Islamic Azad University)
Safavi, Salman (Department of Civil Engineering, Malard Branch, Islamic Azad University)
Marji, Mohammad Fatehi (Mine Exploitation Engineering Department, Faculty of Mining and Metallurgy, Institution of Engineering, Yazd University)
Zhu, Zheming (MOE Key Laboratory of Deep Underground Science and Engineering, School of Architecture and Environment, Sichuan University)
Publication Information
Structural Engineering and Mechanics / v.71, no.1, 2019 , pp. 77-87 More about this Journal
Abstract
In this paper, the interaction between two neighboring tunnel has been investigated using PFC2D. For this purpose, firstly calibration of PFC was performed using Brazilian experimental test. Secondly, various configuration of two neighboring tunnel was prepared and tested by biaxial test. The maximum and minimum principle stresses were 0.2 and 30 MPa respectively. The modeling results show that in most cases, the tensile cracks are dominant mode of cracks that occurred in the model. With increasing the diameter of internal circle, number of cracks decreases in rock pillar also number of total cracks decreases in the model. The rock pillar was heavily broken when its width was too small. In fixed quarter size of tunnel, the crack initiation stress decreases with increasing the central tunnel diameter. In fixed central tunnel size, the crack initiation stress decreases with increasing the quarter size of tunnel.
Keywords
PFC2D; tunnel; tensile crack;
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Times Cited By KSCI : 18  (Citation Analysis)
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