Abstract
AbstractTunneling-induced ground movements can affect the equilibrium state of an existing pile, causing uneven settlement among pile groups and damage to connected structures. This paper presents ...
Highlights
Tunnel construction frequently takes place close to, and in some cases even clashes with, existing piled foundations
The model piles were pushed into the soil at 1 g and 5 N load was applied to the top of the piles during centrifuge spin-up
These results suggest that the radial stress along the pile increased during pile jacking, consistent with previous studies which have illustrated the effect of soil dilation during pile jacking
Summary
Tunnel construction frequently takes place close to, and in some cases even clashes with, existing piled foundations. It is important to understand the influence of tunnelling on pile resistance. For jacked (displacement) piles, as suggested by Boulon and Foray (1986), the pile shaft shearing mechanism during pile jacking is intermediate between constant normal load and constant volume conditions, and can be modelled by a spring normal to the interface, i.e. a constant normal stiffness (CNS) condition. The CNS condition has been widely used in direct shear and ring shear tests to study pile shaft resistance degradation (Kelly, 2001; Evgin and Fakharian, 1997; Tabucanon et al, 1995; Porcino et al, 2003; Mortara et al, 2010; DeJong et al, 2003). Centrifuge tests conducted by Lehane et al (2005) suggested that, for displacement piles, the normal stiffness decreases during shearing. The CNS test can only approximate the pile shaft shearing response
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Geotechnical and Geoenvironmental Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
