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运用ANSYS数值模拟手段,对不同埋深、净距、围岩等级的小净距隧道进行三因素四水平的正交试验,通过对不同因素组合下隧道帮部、顶底板应力及位移的综合分析,结果表明:埋深对隧道围岩的应力影响最大;围岩等级对隧道顶底板的位移影响最大;埋深对远离中夹岩柱的帮部位移影响最大,而围岩等级对靠近中夹岩柱处的帮部位移影响最大。
By means of ANSYS numerical simulation, orthogonal test of three factors and four levels for small clear distance tunnel with different buried depth, clear distance and surrounding rock grade is carried out. Based on the comprehensive analysis of stress and displacement of tunnel gang part, roof and floor under different combinations of factors The results show that the burial depth has the greatest influence on the stress of the surrounding rock of the tunnel. The surrounding rock grade has the greatest influence on the displacement of the top and bottom of the tunnel. The burial depth has the greatest influence on the displacement of the gang part away from the middle rock column, Rock pillar Department of the Department of displacement most affected.