Journal: Tunnelling and Underground Space Technology

Abbreviation

Tunn. undergr. space technol.

Publisher

Elsevier

Journal Volumes

ISSN

0886-7798
1878-4364

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Publications 1 - 10 of 34
  • Comments on «Face stability and required support pressure for TBM driven tunnels with ideal face membrane – Drained case» by S. Han Kim and F. Tonon
    Item type: Other Journal Item
    Anagnostou, Georgios; Perazzelli, Paolo; Schuerch, Roberto (2010)
    Tunnelling and Underground Space Technology
  • Response by the authors to C.C. Li’s discussion of the paper «The interaction between yielding supports and squeezing ground»
    Item type: Other Journal Item
    Cantieni, Linard; Anagnostou, Georgios (2009)
    Tunnelling and Underground Space Technology
  • Numerical interpretation of temperature distributions from three ground freezing applications in urban tunnelling
    Item type: Journal Article
    Pimentel, Erich; Papakonstantinou, Spyridon; Anagnostou, Georgios (2012)
    Tunnelling and Underground Space Technology
  • Face stability conditions with earth-pressure-balanced shields
    Item type: Journal Article
    Anagnostou, Georgios; Kovári, Kalman (1996)
    Tunnelling and Underground Space Technology
  • Seismic response of subway station in soft soil: Shaking table testing versus numerical analysis
    Item type: Journal Article
    Wu, Weifeng; Ge, Shiping; Yuan, Yong; et al. (2020)
    Tunnelling and Underground Space Technology
  • Squeezing loading of segmental linings and the effect of backfilling
    Item type: Journal Article
    Ramoni, Marco; Lavdas, N.; Anagnostou, Georgios (2011)
    Tunnelling and Underground Space Technology
  • Scaling laws for shaking table testing of reinforced concrete tunnels accounting for post-cracking lining response
    Item type: Journal Article
    Antoniou, Maria; Nikitas, Nikolaos; Anastasopoulos, Ioannis; et al. (2020)
    Tunnelling and Underground Space Technology
    This paper proposes a new set of scaling laws for the study of the post-cracking behaviour of lightly reinforced concrete tunnel linings during 1g shaking table testing. The post-cracking behaviour scaling laws are formulated using two non-dimensional parameters: the brittleness number s, which governs the fracturing phenomenon for unreinforced concrete elements and , which plays a primary role for the stability of the process of concrete fracture and steel plastic flow in reinforced concrete elements. The proposed laws allow for the development of an “adequate” experimental model and are validated using numerical analyses of a reinforced tunnel in rock, in both prototype and 1:30 model scale. The adopted experimental set-up is inspired by an existing 1g physical testing campaign on the seismic response of a concrete tunnel in rock and the postulated laws are shown to grant satisfactory similitude between the cracking behaviour of the model and prototype tunnel under two examined earthquake records. The potential of using the proposed laws in 1g tests for Class A predictions of evolving crack patterns in reinforced concrete tunnels is highlighted. The proposed laws are examined under three possible boundary conditions, indicating that both rigid and laminar boxes can still change the behaviour significantly compared to an envisaged free field boundary model. The analysis shows though that for larger soil to lining stiffness ratios, boundary artefacts could be greatly reduced. The present study provides useful recommendations for future 1g tests that did not exist to date, while the proposed scaling laws allow for versatility in the design of novel tunnel lining model test materials.
  • History of the sprayed concrete lining method I: Milestones up to the 1960s
    Item type: Journal Article
    Kovári, Kalman (2003)
    Tunnelling and Underground Space Technology
  • On the feasibility of TBM drives in squeezing ground
    Item type: Other Conference Item
    Ramoni, Marco; Anagnostou, Georgios (2006)
    Tunnelling and Underground Space Technology
  • Fault reactivation induced by tunneling activity in clay material: Hints from numerical modeling
    Item type: Journal Article
    Urpi, Luca; Rinaldi, Antonio Pio (2020)
    Tunnelling and Underground Space Technology
    Seismic events with magnitude 3 and above have been associated with the removal of rock mass in mining environment since long-time. On the contrary, little is known about the possible seismic events induced by tunneling, although it presents similarities with mining. One great example is the case of the 57 km long Gotthard Base Tunnel excavation, which has been associated more than hundred seismic events, with the largest one having magnitude of ML 2.4, damaging the tunnel infrastructures (e.g. gallery floor or portal area). Different underground structures will be built probably up to 1000 m below ground for the construction of future deep geological for the storage of nuclear waste. While seismic risk will probably not constitute a liability for the storage site construction, it is important to understand the potential for reactivation of seismogenic features located nearby the future location of emplacement tunnels. Here we present numerical simulations aimed at understanding the potential for fault reactivation during tunnel construction in clay material, a potential host rock for nuclear waste repository. We evaluate the evolution of the stress changes during the simulation of the excavation with FLAC3D numerical solver. A strain-softening friction model is used to simulate the occurrence of a sudden slip on a fault zone when critical conditions for reactivation are satisfied. This constitutes a worst-case scenario, given the low seismogenic potential of clay rocks. We also present a sensitivity analysis on several critical parameters including fault frictional properties, stress conditions, as well as different tunnel sizes at varying distance from a nearby failure plane, with the final purpose of evaluating safety of a potential nuclear repository site on the short- and long-term.
Publications 1 - 10 of 34