On the influence zones induced by shallow tunnelling in soft soils

M.N. Vu, Wout Broere, Johan Bosch

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

The extent of the influence zone affected by tunnelling depends on the amount
of over-excavation and stress changes induced in the soil, normally represented as a value of volume loss. This study combines upper and lower estimates of volume loss for different soil conditions and ground movement analysis for various cover-to-diameter ratios C/D in order to identify the zones around the tunnel affected by shallow tunnelling. These zones are combined with risk categories of damage to existing buildings to identify whether mitigating
methods or additional control measures during tunnelling would be needed for a safe and damage-free tunnel construction. The boundaries of these influence zones have been derived both for surface and subsurface analyses. Although there is only a small number of available case studies, they show good agreement between the analysis and observed data. The influence of soil parameters on the influence zones is also investigated. This study shows that by
improving soil properties, the boundaries of influence zones can be controlled. The results in this paper are also the first theoretical basis for estimating the requirements for mitigating measures in shallow tunnelling in soft soils.
Original languageEnglish
Title of host publicationEURO:TUN 2017 Proceedings of the IV International Conference on Computational Methods in Tunneling and Subsurface Engineering
EditorsGünter Hofstetter , Konrad Bergmeister, Günther Meschke, Helmut Schweiger
Number of pages8
Publication statusPublished - 2017
EventEURO:TUN 2017: 4th International Conference on Computational Methods in Tunneling and Subsurface Engineering - Innsbruck, Austria
Duration: 18 Apr 201720 Apr 2017
Conference number: 4
http://www.eurotun2017.com

Conference

ConferenceEURO:TUN 2017: 4th International Conference on Computational Methods in Tunneling and Subsurface Engineering
Abbreviated titleEURO:TUN 2017
CountryAustria
CityInnsbruck
Period18/04/1720/04/17
Internet address

Fingerprint Dive into the research topics of 'On the influence zones induced by shallow tunnelling in soft soils'. Together they form a unique fingerprint.

  • Cite this

    Vu, M. N., Broere, W., & Bosch, J. (2017). On the influence zones induced by shallow tunnelling in soft soils. In G. Hofstetter , K. Bergmeister, G. Meschke, & H. Schweiger (Eds.), EURO:TUN 2017 Proceedings of the IV International Conference on Computational Methods in Tunneling and Subsurface Engineering