Underground excavation leads to surface subsidence. Once the surface deformation value exceeds a certain limit, the railway in surface subsidence area will be seriously damaged.
地下开挖工程导致地表沉陷，一旦地表变形值超过一定界限时，地表沉陷区内的铁路就会受到严重破坏。
2
An estimate of bearing capacity coefficients for a strip footing near an excavation is made by using the kinematical approach of limit analysis in this paper.