The influence of tunnelling on adjacent piled foundations

Tunnel constructions in urban area inevitably will affect the behaviour of overlying or adjacent piled foundations. The ground settlements resulting from the tunnel excavation will result in tunnel-pile interaction. However, to date, relevant research on the interaction between a tunnel and piles in Korea has been rather limited. In the current study, the effects of tunnelling on an existing pile constructed in weathered residual soil have been studied by carrying out three-dimensional (3D) elasto-plastic numerical analyses. The numerical modelling considers the effects of pile position with respect to the tunnel location on pile behaviour in terms of ground and pile settlement as well as the shear transfer mechanism. Depending on the pile location, the numerical simulations computed a certain pile settlement and changes in the axial force distribution in the pile. The tunnelling induced an increase in the pile head settlement up to by about 2.15 deltai, where deltai is the pile settlement under an application of a service load prior to the tunnel construction. The maximum green field volume loss was about 0.126%. The pile location can be divided into two zones considering the magnitude of the pile settlement and the changes in the axial force distributions. Based on the results of the numerical simulation, piles should be located at least more than 1.0D laterally from the centre of the tunnel crown to minimise the effects from the tunnelling operation, where D is the tunnel diameter. Some insight into the effects of tunnelling on an adjacent pile obtained from the current study is reported and discussed. (A) This paper was presented at Safety in the underground space - Proceedings of the ITA-AITES 2006 World Tunnel Congress and the 32nd ITA General Assembly, Seoul, Korea, 22-27 April 2006. For the covering abstract see ITRD E129148. "Reprinted with permission from Elsevier".

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08867798
• Authors:
  • LEE, C J
  • JACOBSZ, S W
• Publication Date: 2006-5

Language

• English

Media Info

• Pagination: p430
• Monograph Title: Rock chain 1: A set of codes for the studies of blocks instability inside a tunnel
• Serial:
  • Tunnelling and Underground Space Technology
  • Volume: 21
  • Issue Number: 3-4
  • Publisher: Elsevier
  • ISSN: 0886-7798
  • Serial URL: https://www.sciencedirect.com/journal/tunnelling-and-underground-space-technology

Subject/Index Terms

• TRT Terms: Construction; Mathematical models; Physical distribution; Tunnels; Urban areas
• ITRD Terms: 3655: Construction; 9016: Distribution (gen); 6473: Mathematical model; 3374: Tunnel; 313: Urban area
• Subject Areas: Bridges and other structures; Construction; Freight Transportation; I54: Construction of Tunnels;

Filing Info

• Accession Number: 01032568
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Sep 6 2006 1:57PM