摘要
通过有限元数值模拟软件模拟了浅埋偏压小净距隧道在不同间距和不同埋深条件下的开挖,研究了隧道间距和埋深对隧道围岩变形的影响。结果表明:隧道的最大变形出现在拱顶,但并不在拱顶的正中间,而是中间偏右侧;右侧隧道的拱顶、拱底和侧墙等部位的位移均比左侧隧道的大;随着隧道间距的增大,地表沉降值不断减小,而拱顶下沉累计沉降量先减小后增大;随着隧道埋深的增大,拱顶沉降量增大,地表沉降累计值减小。
The finite element numerical simulation software is used to simulate the excavation of shallow buried tunnel with small spacing under different spacing and different depth, and the influence of tunnel spacing and depth on the deformation of tunnel surrounding rock is studied. The results show that the maximum deformation of the tunnel appears in the vault, but it is on the right side of the center but not in the middle of the vault. The displacement of the arch, arch and side wall of the right tunnel is larger than that of the left tunnel. With the increase of the buried depth of the tunnel, the settlement of the dome increases, while the cumulative value of the surface settlement decreases.
出处
《湖南文理学院学报(自然科学版)》
CAS
2017年第4期45-48,共4页
Journal of Hunan University of Arts and Science(Science and Technology)
关键词
浅埋偏压
小净距隧道
围岩变形
数值模拟
shallow embedded bias
neighborhood tunnels
surrounding rock deformation
numerical simulation