Elastic analysis of tunnelling beneath capped pile groups

Franza, Andrea and Jimenez, Rafael (2019). Elastic analysis of tunnelling beneath capped pile groups. In: "XVII ECSMGE-2019: Geotechnical Engineering foundation of the future", 1st - 6th of September 2019., Reykjavik, Iceland. https://doi.org/10.32075/17ECSMGE-2019-0529.

Description

Title: Elastic analysis of tunnelling beneath capped pile groups
Author/s:
  • Franza, Andrea
  • Jimenez, Rafael
Item Type: Presentation at Congress or Conference (Article)
Event Title: XVII ECSMGE-2019: Geotechnical Engineering foundation of the future
Event Dates: 1st - 6th of September 2019.
Event Location: Reykjavik, Iceland
Title of Book: Proceedings of the XVII ECSMGE-2019: Geotechnical Engineering foundation of the future
Date: 2019
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería Civil: Construcción, Infraestructura y Transporte
Creative Commons Licenses: Recognition - Share

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Abstract

The response of pile groups to ground movements caused by tunnelling has received little attention by researchers for cases involving capped pile groups and tunnel-pile clashes. In this paper, tunnel- pile group interaction (TPGI) is studied using a linear elastic continuum-based finite element model. In the analysis, piles are modelled as Euler-Bernoulli beams that are either constrained by an elevated cap or have a free-head condition; the soil is modelled as an elastic continuum. In the first part of the paper, two pile groups with a 2 x 2 and a 3 x 3 configuration, respectively, are considered for both the cases of tunnelling adjacent to and beneath the piles. The displacements and internal forces of the piles are evaluated, as well as the foundation response in terms of cap movement for varying tunnel-pile group horizontal offset. The effects of increasing the tunnel depth on the TPGI are also evaluated. In the second part of the paper, the impact of tunnel-pile clash on pile settlements and post-tunnelling forces along the trimmed piles is studied for varying cap stiffness. It is shown that the outcomes of the proposed model compare well with more rigorous numerical analyses, hence suggesting the viability of the model as a reliable preliminary design tool.

Funding Projects

TypeCodeAcronymLeaderTitle
Horizon 2020793715TUBEURBUnspecifiedTunnelling beneath piled structures in urban areas

More information

Item ID: 63717
DC Identifier: http://oa.upm.es/63717/
OAI Identifier: oai:oa.upm.es:63717
DOI: 10.32075/17ECSMGE-2019-0529
Deposited by: Dr Andrea Franza
Deposited on: 10 Sep 2020 08:15
Last Modified: 10 Sep 2020 08:16
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