A hybrid model for estimation of ground movements due to mechanized tunnel excavation

For prediction of ground movements caused by mechanized tunnel excavation, the authors propose hybrid modeling, which is a new simulation method. The method combines a submodel, comprising a finite element (FE) simulation, with a computationally efficient metamodel, or surrogate model. Hybrid modeling has three levels. In Level 1, a submodel is extracted from the global model; simulations are conducted in this submodel. Level 2 identifies uncertain soil parameters, based on measurements of surface settlement during excavation. In Level 3, tunneling process parameters can be optimized to control excavation-induced ground movements. The hybrid model is tested through a three-dimensional (3D) numerical simulation of the tunnel excavation, with results indicating that the method, with lower computational cost,s gives reliable responses for the ground around the tunnel.

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  • English

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  • Accession Number: 01782854
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 6 2021 3:14PM