摘要
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。
In this paper a 3D FEM model is established to simulate the Dayuliang tunnel which is located in the gob area. The vertical and horizontal surface displacements of gob area are obtained in different simulation conditions. By these calculated results the features and key regions of gob surface subsidence are analyzed, and warning line of subsidence basin is determined. In order to control tunnel structural＇s stability its deformation and stress characteristics are also studied to determine stress concentration and supporting position. The analysis results provide a scientific basis and technical guidance for the tunnel construction in gob area.
出处
《公路》
北大核心
2014年第5期30-36,共7页
Highway
关键词
隧道结构
采空区
水平变形
注浆
地表沉降
tunnel structure
gob areal horizontal deformation
grouting
surface subsidence
