ABSTRACT
Tunnel Boring Machines (TBMs) are widely employed for tunneling in urban areas. TBM-induced ground deformations, particularly surface settlements, are significant concern as they can adversely affect adjacent structures. This study covers modern three dimensional (3D) finite element modelling for estimation of surface settlements caused by TBM operations in layered soils. Detailed 3D modelling and analysis is done in MIDAS GTS-NX software. The study highlights the sensitivity of key input parameters affecting the tunneling-induced surface settlements for a location in National Capital Region (NCR), India. The analysis findings help in understanding the ground response to the TBM operations in complex geotechnical environments. Detailed and cutting edge 3D modelling techniques used, provides optimized results best suitable for detailed construction stage design. The outcomes contribute to safer and more efficient tunnel design by deepening the understanding of soil-structure interactions, ultimately enhancing risk mitigation and project efficiency in urban tunneling contexts.
