Numerical analysis of a tunnel in swelling rockmass by a modified Cam-Clay based model

Xiaodong Liu, Seishiro Matsubara, Shotaro Yamada, Takashi Kyoya

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

Abstract

In the present study, a return mapping algorithm is formulated for an elasto-plastic swell model based on the Modified Cam-Clay(MCC) model, which can show the soft/hard behavior of swelling process by applying the finite element method (FEM). Several simple numerical examples are used to assess the efficiency and convergence of the formulation of the return mapping algorithm. This study is contributed to predicting the nonlinear mechanical response of the tunnel constructed in swelling rockmass, which contains the stress redistribution of the tunnel after excavation and the soft/hard response caused by swelling process. The numerical simulation will show the swell deformation, strain path and stress history of a tunnel which ground masses has occurred the process of water-absorption, aimed at evaluating the stability of a tunnel constructed in swelling rockmass after some years.

Original languageEnglish
Title of host publication5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019
PublisherInternational Society for Rock Mechanics and Rock Engineering
Pages657-661
Number of pages5
ISBN (Electronic)9784907430047
Publication statusPublished - 2019
Event5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019 - Okinawa, Japan
Duration: 2019 Dec 12019 Dec 4

Publication series

Name5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019

Conference

Conference5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future, YSRM 2019
CountryJapan
CityOkinawa
Period19/12/119/12/4

Keywords

  • Modified Cam-Clay
  • Return Mapping
  • Soft/hard Response
  • Swelling Rockmass

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

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