Geomechanics and Engineering

  • 제38권6호
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  • Pages.603-609
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  • 2024
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Efficient recycling strategies for slurry TBM excavated soil

  • Sung-Min Nam (Department of Civil., Hyundai Engineering & Construction) ;
  • Joon-Shik Moon (Department of Civil Engineering, Kyungpook National University) ;
  • Junyoung Ko (Department of Civil Engineering, Chungnam National University) ;
  • Hyoungseok Oh (Department of Civil Engineering, Kyungpook National University)
  • 투고 : 2023.11.24
  • 심사 : 2024.02.14
  • 발행 : 2024.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

In downtown subway project most of excavated soil is discarded externally, whereas in road construction excavated soil is used as filling material and management of surplus soil becomes important factor for success of the project. Excavated materials from slurry shield TBM are discharged through discharge pipe to slurry treatment plant and excavated soil mixed with bentonite are separated in separation plant by grain size. Fine material has been discarded together in filter cake without recycling. Its volume can vary according to geologic condition but statistically fine material as filter cake is about 5%~30% out of overall excavated volume. However, filter cake is non-toxic and can be recycled when mixed in the appropriate proportions with coarse aggregate. Therefore, in this study, utilization of excavated soil from a slurry shield TBM were examined and lab tests were conducted to find the proper way for mixing filter cake and aggregate to be recycled as fill material for road construction.

키워드

과제정보

This work is supported by the Korea Agency for Infrastructure Technology Advancement (KAIA) grant funded by the Ministry of Land, Infrastructure and Transport (Grant RS-2023-00251002).

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