Abstract
This work was supported by the Engineering and Physical Sciences Research Council (EPSRC) [EP/K023020/1, 1296878, EP/N509620/1].
Highlights
The development of urban areas has resulted in an increased demand for underground construction that often requires the excavation of tunnels
This paper addresses the problem of tunnel-pile-structure interaction and considers the important role of pile head load variation during tunnel excavation that occurs, for instance, due to load redistribution between adjacent piles caused by the superstructure stiffness
Greenfield ground movements are often used as an input or reference for soil-structure interaction analyses
Summary
The development of urban areas has resulted in an increased demand for underground construction that often requires the excavation of tunnels. If protective measures are not adopted, tunneling can pose a threat to the serviceability and ultimate limit state requirements of nearby structures. Research has shown that structure stiffness tends to decrease tunneling-induced structural distortions with respect to the greenfield case (Mair et al 1996; Dimmock and Mair 2008; Burland et al 2004; Amorosi et al 2014; Fargnoli et al 2015; Farrell et al 2014; Son 2015; Camos and Molins 2015; Finno et al 2005; Losacco et al 2014; Namazi and Mohamad 2013), and that an increase in the structure weight results in an increase of the potential for damage (Giardina et al 2015). It has been shown that deflections are mostly dependent on structural bending stiffness, whereas axial strains depend on structural axial stiffness (Potts and Addenbrooke 1997; Franzius et al 2006)
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