Tunnel–framed building interaction: comparison between raft and separate footing foundations

Xu, Jingmin and Franza, Andrea and Marshall, Alec M and Losacco, Nunzio and Boldini, Daniela (2020). Tunnel–framed building interaction: comparison between raft and separate footing foundations. "Géotechnique" ; ISSN 1751-7656. https://doi.org/10.1680/jgeot.19.P.393.

Description

Title: Tunnel–framed building interaction: comparison between raft and separate footing foundations
Author/s:
  • Xu, Jingmin
  • Franza, Andrea
  • Marshall, Alec M
  • Losacco, Nunzio
  • Boldini, Daniela
Item Type: Article
Título de Revista/Publicación: Géotechnique
Date: 2020
ISSN: 1751-7656
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería Civil: Construcción, Infraestructura y Transporte
Creative Commons Licenses: None

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Abstract

In this paper, the influence of the foundation configuration (raft or separate footings) on tunnel–soil–framed building interaction is investigated using geotechnical centrifuge testing. Tunnelling-induced soil movements and deformation fields, framed building displacements and structure shear distortions (with associated modification factors) are illustrated. Framed building stiffness and footing bearing capacity are also evaluated experimentally. Results show that the foundation configuration plays an important role in determining the ground response to tunnelling, affecting soil displacement fields, as well as the distribution of soil shear and volumetric strains. In particular, foundation settlements and differential horizontal displacements are larger for separate footings compared to raft foundations. The effects of building width, weight and eccentricity (with respect to the tunnel) on foundation settlements and structural distortions are quantified for separate footings and contrasted against results for raft foundations. The modification factor of the maximum building shear distortion is linked to the relative soil–building shear stiffness; interestingly, for buildings with similar values of relative stiffness, the level of shear distortion within framed buildings is lower for separate footings than rafts.

Funding Projects

TypeCodeAcronymLeaderTitle
Horizon 2020793715TUBEURBUnspecifiedTunnelling beneath piled structures in urban areas

More information

Item ID: 63714
DC Identifier: http://oa.upm.es/63714/
OAI Identifier: oai:oa.upm.es:63714
DOI: 10.1680/jgeot.19.P.393
Official URL: https://www.icevirtuallibrary.com/doi/pdf/10.1680/jgeot.19.P.393
Deposited by: Dr Andrea Franza
Deposited on: 10 Sep 2020 07:41
Last Modified: 10 Sep 2020 07:41
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