Long-term behavior of the tunnel under the loads of consolidation and tunnel temperature

A. Afshani, W. Li, H. Akagi, O. Shigeaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Tunnel excavated in low-permeability soil may experience large deformation and increase in lining load if water drains into the tunnel. Long-term dissipation of tunnelinginduced excess pore pressure into the tunnel consolidates soil around tunnel with low permeability and imposes extra load on the lining. Meanwhile, seasonal temperature can also expand and shrink joint opening between rings and segments and alters the rate of water leakage into the tunnel. The lining deformation can increase under the incremental increase of consolidation load, but it might also show fluctuating pattern because of the seasonal temperature. In this study, combined effect of long-term consolidation load and seasonal temperature load on the joint opening are discussed. An empirical relationship between water discharge into the tunnel and the amount of joint opening is proposed using the field measurements data of an old tunnel. Then, the joint opening under the influence of both consolidation and temperature load are investigated using a soil-water coupled consolidation model and a thermal stress model. The numerical results show that by employment of these numerical models, the behavior of joints between rings can be simulates very close to those of measured ones.

Original languageEnglish
Title of host publicationTunnels and Underground Cities
Subtitle of host publicationEngineering and Innovation meet Archaeology, Architecture and Art- Proceedings of the WTC 2019 ITA-AITES World Tunnel Congress
EditorsGiulia Viggiani, Tarcisio Celestino, Daniele Peila, Giulia Viggiani
PublisherCRC Press/Balkema
Pages5254-5263
Number of pages10
ISBN (Print)9781138388659
DOIs
Publication statusPublished - 2019 Jan 1
EventWorld Tunnel Congress, WTC 2019 and the 45th General Assembly of the International Tunnelling and Underground Space Association, ITA-AITES 2019 - Naples, Italy
Duration: 2019 May 32019 May 9

Publication series

NameTunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art- Proceedings of the WTC 2019 ITA-AITES World Tunnel Congress

Conference

ConferenceWorld Tunnel Congress, WTC 2019 and the 45th General Assembly of the International Tunnelling and Underground Space Association, ITA-AITES 2019
CountryItaly
CityNaples
Period19/5/319/5/9

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology
  • Building and Construction

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  • Cite this

    Afshani, A., Li, W., Akagi, H., & Shigeaki, O. (2019). Long-term behavior of the tunnel under the loads of consolidation and tunnel temperature. In G. Viggiani, T. Celestino, D. Peila, & G. Viggiani (Eds.), Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art- Proceedings of the WTC 2019 ITA-AITES World Tunnel Congress (pp. 5254-5263). (Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art- Proceedings of the WTC 2019 ITA-AITES World Tunnel Congress). CRC Press/Balkema. https://doi.org/10.1201/9780429424441-556