TY - JOUR ID - 958 TI - Effect of Surface Blasting on Subway Tunnels- A Parametric Study JO - روش های تحلیلی و عددی در مهندسی معدن JA - ANM LA - fa SN - 2251-6565 AU - Entezari Zarch, Hossein AU - Barkhordari, Kazem AD - Dept. of Civil, Yazd University, Iran Y1 - 2017 PY - 2017 VL - 6 IS - ویژه نامه انگلیسی SP - 63 EP - 72 KW - Blast Loading KW - Subway Tunnels KW - finite difference method KW - dynamic analysis DO - N2 - During wars and crises, the underground tunnels are used as a safe space. Therefore, the stability and safety of them under a blast is of particular importance. In this paper, the Finite Difference Method has been used to study the influence of the change in geotechnical parameters and depth on surface blasting on subway tunnels. Results showed that increasing the internal friction angle, modulus of elasticity and cohesion of the soil reduced the effects of blast loads on the vertical displacement and bending moment in the center of tunnel crown. Furthermore, the results showed that increasing the depth of the tunnel reduced the effects of blast loading. Comparing all parameters collectively showed that the increase in the modulus of elasticity of the soil and depth of the tunnel is the most effective in reducing the influence of the blast loads on the vertical displacement and bending moment of the tunnel crown, respectively. UR - https://anm.yazd.ac.ir/article_958.html L1 - https://anm.yazd.ac.ir/article_958_a3ae6245cb1ed1f70488e2b4845fbb81.pdf ER -