Three-dimensional numerical simulation analysis of the influence of pit excavation based on hardening soilsmall strain model for metro tunnel

The parameters of a Hardening soil-small strain model are set up legitimately by means of a laboratory geotechnical test, situ testing, virtual laboratory and database of FEM software Z-Soil. A three-dimensional numerical simulation model is constructed, as well as processing the analysis of fluid-structure interaction. The influence of pit excavation under various construction conditions on the metro tunnel is evaluated and is compared with actual results. The experience of selecting models, setting up parameters and analysis assessment is provided to similar projects.