Monitoring of Ground Behavior During the Excavation of an Underground Ramp

Grant Hasan, Alireza Afshani, Hirokazu Akagi, Keiichiro Endou

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

Abstract

In large cities, underground spaces are gradually limited and interaction between new excavation and existing underground structure becomes a very important problem. The excavation of several underground ramps was launched in Tokyo to link the aboveground traffic flow with underground tunnels. The ramps approach underground twin tunnels and then connect to them. Detailed monitoring instruments were set on the ground surface and nearby tunnels to monitor ground and nearby structures during excavation. The excavation details of one of the ramps are studied. The ramp has a unique spiral curvature in both vertical and horizontal directions. Ground surface instrumentations and monitoring outputs are discussed along ramp alignment before, during, and after passing of the shield machine through several sections. The transverse and longitudinal ground surface settlement data are mainly discussed and interpreted. Also, a numerical model of one of the ramps was created to investigate various influencing parameters and prospect the behaviour of ground-tunnels systems where field data are not available. The predicted results are also limited to tunnelling-induced ground displacement.

Original languageEnglish
Title of host publicationInformation Technology in Geo-Engineering - Proceedings of the 3rd International Conference ICITG 2019
EditorsAntónio Gomes Correia, Joaquim Tinoco, Paulo Cortez, Luís Lamas
PublisherSpringer
Pages718-729
Number of pages12
ISBN (Print)9783030320287
DOIs
Publication statusPublished - 2020
Event3rd International Conference on Information Technology in Geo-Engineering, ICITG 2019 - Guimarães, Portugal
Duration: 2019 Sep 292019 Oct 2

Publication series

NameSpringer Series in Geomechanics and Geoengineering
ISSN (Print)1866-8755
ISSN (Electronic)1866-8763

Conference

Conference3rd International Conference on Information Technology in Geo-Engineering, ICITG 2019
CountryPortugal
CityGuimarães
Period19/9/2919/10/2

Keywords

  • Curved alignment
  • Field instrumentation
  • Ground movements
  • Monitoring points
  • Tunnel
  • Underground ramp

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials

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  • Cite this

    Hasan, G., Afshani, A., Akagi, H., & Endou, K. (2020). Monitoring of Ground Behavior During the Excavation of an Underground Ramp. In A. G. Correia, J. Tinoco, P. Cortez, & L. Lamas (Eds.), Information Technology in Geo-Engineering - Proceedings of the 3rd International Conference ICITG 2019 (pp. 718-729). (Springer Series in Geomechanics and Geoengineering). Springer. https://doi.org/10.1007/978-3-030-32029-4_61