Deformation of framed structures due to tunnelling - a novel assessment approach

摘要

It is common practice to assess the deformation of structures due to tunnelling-induced effects by assuming that foundation movements coincide with greenfield tunnelling movements. This often overestimates the resulting movements and stresses on the structures and may fail to give the correct deformed shape for detailed damage assessment. This paper proposes a novel approach to study the interaction between tunnels and framed structures, based on the translational and rotational stiffness of foundations from the field of seismic engineering. This approach can readily be deployed in routine civil engineering design and tunnelling impact assessment.