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Arabian Journal for Science and Engineering

, Volume 44, Issue 5, pp 4201–4212 | Cite as

Sealant Performance Test and Stress–Seepage Coupling Model for Tunnel Segment Joints

  • Chenghua Shi
  • Chengyong Cao
  • Mingfeng LeiEmail author
  • Weichao Yang
Research Article - Civil Engineering
  • 16 Downloads

Abstract

Although the sealant performance of segment joints has an important influence on the durability of shield tunnels, it is rarely discussed theoretically. In this study, sealant performance tests of segment joints were designed and conducted on the basis of the stress and deformation characteristics of segment joints of a metro tunnel. The sealant performance of segment joints was obtained at different joint openings and dislocation deformations. A stress–seepage coupling model for segment joints was established, and the corresponding coupling equation for contact interface was deduced. The relevant parameters of the coupling equation were determined using the test results. The coupling model was used to analyse the influence of joint opening and dislocation on the sealant performance of joints. The opening and dislocation deformation of segment joints could considerably reduce the sealant critical pressure of the joints. Consequently, the sealant capability of the joints significantly declined, and the seepage flow velocity rapidly increased.

Keywords

Shield tunnel Segment joint Sealant performance Stress–seepage coupling model 

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Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  • Chenghua Shi
    • 1
  • Chengyong Cao
    • 1
  • Mingfeng Lei
    • 1
    Email author
  • Weichao Yang
    • 1
  1. 1.School of Civil EngineeringCentral South UniversityChangshaChina

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