tunnel and underground excavation

It may avoid stopping transportation and polluting city environment to have excavation in the open replaced by shallow-concealed excavation for large scale underground cable tunnel construction.

采用浅埋暗挖法施工地下电缆隧道取代明沟开挖法，可避免阻断交通、污染城市环境。

However, the excavation of a tunnel through the mountain on the Yu-He Highway has changed the circulation of the local underground water resources and resulted in the losses of water.

渝合高速公路隧道横穿中梁山，破坏了地下水的循环过程，引起泉水和地表水的枯竭。

Based on analytical method of construction mechanics, the simulative computational FEM formulations about multi-stage excavation of underground tunnel and timely shoring are prescribed.

基于施工力学的分析方法，建立了地下隧洞分期开挖、适时支护仿真计算的有限元列式。