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http://dx.doi.org/10.12814/jkgss.2020.19.4.065

Application of Laboratory Pressurized Vane Shear Test and Discrete Element Method for Determination of Foam-conditioned Soil Properties  

Kang, Tae-Ho (Underground Space Safety Research Center, Korea Institute of Civil Engineering and Building Technology)
Lee, Hyobum (School of Civil and Environmental Engineering, Korea Univ.)
Choi, Hangseok (School of Civil and Environmental Engineering, Korea Univ.)
Choi, Soon-Wook (Underground Space Safety Research Center, Korea Institute of Civil Engineering and Building Technology)
Chang, Soo-Ho (Construction Industry Promotion Department, Korea Institute of Civil Engineering and Building Technology)
Lee, Chulho (Underground Space Safety Research Center, Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of the Korean Geosynthetics Society / v.19, no.4, 2020 , pp. 65-74 More about this Journal
Abstract
In earth pressure balance (EPB) shield TBM tunnelling, the application of soil conditioning which improves properties of the excavated muck by additives injection, is generally used for enhancing the performance of TBM. Therefore it is important to apply the soil conditioning in the numerical model which simulates excavation performance of TBM equipment, but related studies on a method that simulates soil conditioning are insufficient to date. Accordingly, in this study, an laboratory pressurized vane test apparatus was devised to evaluate the characteristics of conditioned soil. Using the apparatus, the vane shear tests were performed on foam-conditioned soil with different shear rates, and the test was numerically simulated with discrete element method (DEM). Finally, the contact properties of particles in DEM were determined by comparing the results of test and analysis, and it indicates that the applicability of pressurized vane test and DEM model for reproducing soil conditioning in TBM excavation model with DEM.
Keywords
Discrete element method; EPB shield; Foam; Soil conditioning; TBM; Vane shear test;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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