Implications of volume loss on the seismic response of tunnels in coarse-grained soils

Georgios Kampas (Lead / Corresponding author), Jonathan Knappett, Michael Brown, Ioannis Anastasopoulos, Nikolaos Nikitas, Raul Fuentes

Research output: Contribution to journalArticle

19 Downloads (Pure)

Abstract

This paper examines the seismic response of a “horseshoe–shaped” tunnel, inspired by a recently constructed Metro tunnel in Santiago, Chile. A FE analysis has been conducted, investigating the effect of soil density, apparent cohesion, the interface between the tunnel and the surrounding soil, the intensity of the seismic excitation and the effect of volume loss due to tunnel construction on the seismic behaviour of tunnels. The presence of apparent cohesion leads to a reduction of tunnel distress and to smaller post-earthquake ground settlements over a reduced distance from the tunnel. The consideration of volume loss does not significantly affect the acceleration field around the tunnel, but does beneficially decrease the lining forces. Furthermore, although it leads to an increase of the pre-earthquake settlements, it is found to decrease the co-seismic settlements. Finally, it was found that the most conservative model regarding the design detailing of the tunnel lining would be considering a rough interface, zero cohesion, and negligible volume loss (i.e., an ideally-excavated tunnel).

Original languageEnglish
Article number103127
Pages (from-to)1-14
Number of pages14
JournalTunnelling and Underground Space Technology
Volume95
Early online date10 Oct 2019
DOIs
Publication statusE-pub ahead of print - 10 Oct 2019

Fingerprint

Seismic response
seismic response
Tunnels
tunnel
Soils
soil
cohesion
Earthquakes
Tunnel linings
loss
ground settlement
earthquake
tunnel lining
Linings

Cite this

Kampas, Georgios ; Knappett, Jonathan ; Brown, Michael ; Anastasopoulos, Ioannis ; Nikitas, Nikolaos ; Fuentes, Raul. / Implications of volume loss on the seismic response of tunnels in coarse-grained soils. In: Tunnelling and Underground Space Technology. 2020 ; Vol. 95. pp. 1-14.
@article{7930cb8442324e55a0d638d0af192fc0,
title = "Implications of volume loss on the seismic response of tunnels in coarse-grained soils",
abstract = "This paper examines the seismic response of a “horseshoe–shaped” tunnel, inspired by a recently constructed Metro tunnel in Santiago, Chile. A FE analysis has been conducted, investigating the effect of soil density, apparent cohesion, the interface between the tunnel and the surrounding soil, the intensity of the seismic excitation and the effect of volume loss due to tunnel construction on the seismic behaviour of tunnels. The presence of apparent cohesion leads to a reduction of tunnel distress and to smaller post-earthquake ground settlements over a reduced distance from the tunnel. The consideration of volume loss does not significantly affect the acceleration field around the tunnel, but does beneficially decrease the lining forces. Furthermore, although it leads to an increase of the pre-earthquake settlements, it is found to decrease the co-seismic settlements. Finally, it was found that the most conservative model regarding the design detailing of the tunnel lining would be considering a rough interface, zero cohesion, and negligible volume loss (i.e., an ideally-excavated tunnel).",
author = "Georgios Kampas and Jonathan Knappett and Michael Brown and Ioannis Anastasopoulos and Nikolaos Nikitas and Raul Fuentes",
note = "Open access will be applied for via University of Leeds as this is from an EPSRC Newton Fund: EPSRC, UK & CONICYT Chile: Shaking tunnel vision. Joint project led by University of Leeds (Fuentes, R., Nikitas, N. with Dundee CIs Jonathan Knappett. EP/N03435X/1.",
year = "2019",
month = "10",
day = "10",
doi = "10.1016/j.tust.2019.103127",
language = "English",
volume = "95",
pages = "1--14",
journal = "Tunnelling and Underground Space Technology",
issn = "0886-7798",
publisher = "Elsevier",

}

Implications of volume loss on the seismic response of tunnels in coarse-grained soils. / Kampas, Georgios (Lead / Corresponding author); Knappett, Jonathan; Brown, Michael; Anastasopoulos, Ioannis; Nikitas, Nikolaos; Fuentes, Raul.

In: Tunnelling and Underground Space Technology, Vol. 95, 103127, 01.01.2020, p. 1-14.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Implications of volume loss on the seismic response of tunnels in coarse-grained soils

AU - Kampas, Georgios

AU - Knappett, Jonathan

AU - Brown, Michael

AU - Anastasopoulos, Ioannis

AU - Nikitas, Nikolaos

AU - Fuentes, Raul

N1 - Open access will be applied for via University of Leeds as this is from an EPSRC Newton Fund: EPSRC, UK & CONICYT Chile: Shaking tunnel vision. Joint project led by University of Leeds (Fuentes, R., Nikitas, N. with Dundee CIs Jonathan Knappett. EP/N03435X/1.

PY - 2019/10/10

Y1 - 2019/10/10

N2 - This paper examines the seismic response of a “horseshoe–shaped” tunnel, inspired by a recently constructed Metro tunnel in Santiago, Chile. A FE analysis has been conducted, investigating the effect of soil density, apparent cohesion, the interface between the tunnel and the surrounding soil, the intensity of the seismic excitation and the effect of volume loss due to tunnel construction on the seismic behaviour of tunnels. The presence of apparent cohesion leads to a reduction of tunnel distress and to smaller post-earthquake ground settlements over a reduced distance from the tunnel. The consideration of volume loss does not significantly affect the acceleration field around the tunnel, but does beneficially decrease the lining forces. Furthermore, although it leads to an increase of the pre-earthquake settlements, it is found to decrease the co-seismic settlements. Finally, it was found that the most conservative model regarding the design detailing of the tunnel lining would be considering a rough interface, zero cohesion, and negligible volume loss (i.e., an ideally-excavated tunnel).

AB - This paper examines the seismic response of a “horseshoe–shaped” tunnel, inspired by a recently constructed Metro tunnel in Santiago, Chile. A FE analysis has been conducted, investigating the effect of soil density, apparent cohesion, the interface between the tunnel and the surrounding soil, the intensity of the seismic excitation and the effect of volume loss due to tunnel construction on the seismic behaviour of tunnels. The presence of apparent cohesion leads to a reduction of tunnel distress and to smaller post-earthquake ground settlements over a reduced distance from the tunnel. The consideration of volume loss does not significantly affect the acceleration field around the tunnel, but does beneficially decrease the lining forces. Furthermore, although it leads to an increase of the pre-earthquake settlements, it is found to decrease the co-seismic settlements. Finally, it was found that the most conservative model regarding the design detailing of the tunnel lining would be considering a rough interface, zero cohesion, and negligible volume loss (i.e., an ideally-excavated tunnel).

UR - http://www.scopus.com/inward/record.url?scp=85073011932&partnerID=8YFLogxK

U2 - 10.1016/j.tust.2019.103127

DO - 10.1016/j.tust.2019.103127

M3 - Article

VL - 95

SP - 1

EP - 14

JO - Tunnelling and Underground Space Technology

JF - Tunnelling and Underground Space Technology

SN - 0886-7798

M1 - 103127

ER -