THE INFLUENCE OF BUILDING WEIGHT ON TUNNELLING-INDUCED GROUND AND BUILDING DEFORMATION

摘要

The authors would like to thank Augarde, Burd and Houlsby for their interest in the paper. Their discussion concentrates on three points and these are addressed below. The first point highlights that research by the Oxford group, of which Augarde, Burd and Houlsby are part of, has also investigated the influence of building weight on tunnel induced building movement (Liu et al., 2001). This work is indeed a valuable contribution to the literature and, as pointed out in the discussion, comes to simular conclusions to those presented in our paper. However, there are significant differences between the two pieces of research. In our paper the building, modelled as an elastic beam, represents a multi-storey building in which significant stiffness is derived from the floor slabs, whereas in Liu et al. (2001) a single masonry facade, ignoring any contribution from floor stabs and without a foundation, is modelled. In addition, and perhaps more importantly, in our analyses full dissipation (i.e. consolidation) of excess pore water pressures generated due to construction of the building was simulated prior to tunnel excavation which was then performed with the soil modelled as undrained. This resulted in an increase in stiffness and strength of the soil, due to the application of building weight, prior to tunnel construction.