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为研究地铁盾构分岔隧道问题,采用FLAC3D三维模拟技术以原始隧道经过简化得到计算分析三维模型,分析了不同分岔角度下的应力、变形问题.研究结果表明:分岔隧道的应力、变形随分岔隧道夹角的增大而减小,应力叠加越来越小,当分叉角度较大时,应力集中峰值开始分岔变为两个峰值;通过与现场监测结果对比,现场监测值与数值模拟结果吻合.
In order to study the problem of the bifurcation tunnel in metro shield, the three-dimensional model of the original tunnel was simplified by FLAC3D 3D simulation technology, and the stress and deformation problems under different bifurcation angles were analyzed.The results show that the stress and deformation of bifurcated tunnel With the increase of the included angle of the bifurcated tunnels, the stress stack becomes smaller and smaller. When the bifurcation angle is larger, the peak of stress concentration starts to bifurcate into two peaks. By comparing with the field monitoring results, The numerical simulation results are in good agreement.