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建立了位于采空区的大雨亮隧道三维有限元模型,计算了不同工况下地表水平和竖直位移。分析了地表沉陷盆地特征,划分了地表沉陷关键部位,圈定了地表安全预警范围。同时对隧道变形和应力特征进行了研究,通过分析结构应力集中部位确定了隧道支护部位,使得施工中隧道的稳定性得到了很好地控制。研究成果能够很好地为采空区隧道施工提供理论依据和技术指导。
A three-dimensional finite element model of heavy rain tunnel located in the goaf was established, and the horizontal and vertical displacement of the ground surface under different conditions were calculated. The characteristics of surface subsidence basin are analyzed, the key parts of surface subsidence are divided, and the precautionary range of surface safety is defined. At the same time, the deformation and stress characteristics of the tunnel are studied. The location of the tunnel support is determined by analyzing the stress concentration of the structure, so that the stability of the tunnel during construction is well controlled. The research results can well provide theoretical basis and technical guidance for tunnel construction in goaf.