Research methods: This paper simulatedly calculated with ANSYS software the excavating process of center drifts excavation method , and analyzed the nonlinear numerical model with reasonable parameter and ”dead and live" element method. The weak area was reinforced in time to ensure the surrounding soil in stable condition.
Research results: Through comparing and analyzing the monitoring information with numerical result, this paper approved that the numerical model and parameter selection were rational and the calculation results were right and reasonable.
Research conclusions: The theoretical computation subsidence curve was fundamentally unanimous with the practical monitoring curve. It proved that the numerical simulation was in agreement with practice. The numerical simulation result was valuable in qualitative analysis the stability of the soil, but quantitative analysis was quite difficult. It was necessary that the key parameter (such as deformation modulus etc.)and its sensitivity were discussed and analyzed when the numerical simulation was carried out.
2007, Vol. 24 
