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http://dx.doi.org/10.9711/KTAJ.2019.21.5.689

DEM numerical study for the effect of scraper direction on shield TBM excavation in soil  

Lee, Gi-Jun (Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST))
Kim, Huntae (R&D Center (TBM Technical Team), Head Office, Energy & Machinery Korea)
Kwon, Tae-Hyuk (Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST))
Cho, Gye-Chun (Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST))
Kang, Shin-Hyun (R&D Center, Head Office, Energy & Machinery Korea)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.21, no.5, 2019 , pp. 689-698 More about this Journal
Abstract
In tunnel excavation by TBMs, a cutterhead, which practically excavates the ground, is an important part directly affecting net penetration rate. Most of the researches on the cutterhead design that have been carried out until now are on the cutter arrangement. It is difficult to find a study for the effect of the scraper installation direction on TBM excavation although same cutterheads except for direction of the scraper are used in Korea. Therefore, this paper shows how the direction of scraper installation affects shield-TBM excavation. Discrete element method was used to identify the effect of scraper installation direction on shield-TBM excavation. When the scraper installation direction was outward, the amount of particles per unit time flowed into the cutter head opening was smaller than when the scraper installation direction was inward, and more loads were applied to the cutterhead.
Keywords
TBM; Cutterhead; Scraper; Soil; Excavation;
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Times Cited By KSCI : 3  (Citation Analysis)
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