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(사)한국터널지하공간학회

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Vol.21 No.5
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DEM numerical study for the effect of scraper direction on shield TBM excavation in soil

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2019, v.21 no.5, pp.689-698
https://doi.org/10.9711/KTAJ.2019.21.5.689





& (2019). DEM numerical study for the effect of scraper direction on shield TBM excavation in soil. (사)한국터널지하공간학회, 21(5), 689-698, https://doi.org/10.9711/KTAJ.2019.21.5.689
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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, 커터헤드, 스크래퍼, 토사, 굴착

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