Assessing tunnel-structure interaction effects in London Clay
Assessing tunnel-structure interaction effects in London Clay
In the context of tunnelling in urban areas, the serviceability of existing infrastructure must be guaranteed when these structures are subjected to tunnelling activities in their vicinity. Tunnel construction inevitably causes movements in the tunnel surroundings. It can also lead to potentially differential settlements of existing buildings with associated serviceability problems. To prevent such problems, the accurate prediction of tunnelling-induced building settlements becomes essential. In this paper, the case study of the construction of the Elizabeth line beneath a site in Whitechapel, London, is simulated using 2D finite element (FE) analysis. The investigation considers first the analysis of greenfield conditions, for which field measurements are available. The numerical results are shown to be in very good agreement with field measurements which validates the adopted soil models. The second part of the study involves the analysis of tunnelling beneath a building, where the influence of the building and the characteristics of its foundations on the shape of the settlement trough is evaluated.
J. Liu; Aikaterini Tsiampousi; Agustin Ruiz Lopez; David M. G. Taborda
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
A - New developments on structural design
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