Monitoring measurement and numerical simulation of Dalian subway tunnel

According to the surface subsidence displacement,convergence displacement of tunnel surrounding,vault settlement etc.of Jiaoshi section of Dalian subway one phase project 208 made process and analysis,made numerical simulation to tunnel step method construction using elastic-plastic analysis method,and compared the surrounding deformation prediction values with the actual measured values,analysed the causes of errors,had important significance to ensure the safety of existing facilities and construction process.