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2024 Vol.26, Issue 5 Preview Page

Research Paper

Case study on slurry performance according to the recycling of slurry TBM filtrate water with coagulant

이수식 TBM의 응집제 사용수 재활용에 따른 슬러리 성능 연구

Han-Byul Kang1
,
Jae-Won Lee2
,
Ju-Hyi Yim3
,
Byung-Cheol Ahn4
,
Young Jin Shin5*
강 한별1
,
이 재원2
,
임 주휘3
,
안 병철4
,
신 영진5*
1Senior Researcher, R&D Department, Hyundai Engineering & Construction
2Senior Researcher, R&D Department, Hyundai Engineering & Construction
3Researcher, R&D Department, Hyundai Engineering & Construction
4Project Manager, Kimpo and Paju Expressway No.400 (Section No.2), Hyundai Engineering & Construction
5Senior Researcher, R&D Department, Hyundai Engineering & Construction
1정회원, 현대건설 기술연구원 책임연구원
2비회원, 현대건설 기술연구원 책임연구원
3비회원, 현대건설 기술연구원 연구원
4정회원, 현대건설 고속국도 제400호선 김포-파주간 건설공사 제2공구 현장소장
5정회원, 현대건설 기술연구원 책임연구원
*Corresponding Author
30 September 2024. pp. 449-461
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Abstract

The use of tunnel boring machine (TBM), a mechanized excavation method with low noise and vibration and high safety compared to NATM method, has increased globally. In particular, slurry shield TBMs are used in subsea and submarine sections because they have an advantage in high pressure compared to EPB (earth pressure balanced) methods. As such, the used water of slurry shield TBMs is discharged through wastewater treatment facilities. In the case of large-scale TBMs, the amount of water used is enormous, so it should be recycled to reduce costs and protect the environment. Various types of additives are used to improve the performance of the slurry treatment plant (STP) and filter press. Among them, coagulants improve the productivity of the filter press by neutralizing the charges on particles. In this study, lab tests were conducted to evaluate the reusability of the used water through the filter press after flocculants were added.

Keywords
Slurry TBM
Bentonite
Coagulant

NATM 공법과 비교하여 소음 및 진동이 적고 안전성이 높은 기계화 굴착공법인 TBM (tunnel boring machine)의 사용이 전 세계적으로 증가하였다. 특히 이수식(slurry shield) TBM의 경우 EPB (earth pressure balanced) 방식에 비해 고수압에 유리하므로 하저 및 해저 구간 등에서 많이 사용된다. 이와 같이 이수식 TBM의 사용수는 오폐수처리시설을 거쳐 방류된다. 대단면 TBM의 경우, 사용되는 물의 양이 막대하기 때문에 재활용을 통해 비용 저감 및 환경 보호가 가능하다. 이수식 TBM에서는 지상의 이수처리시설인 STP (slurry treatment plant)와 필터프레스(filter press)의 성능을 향상시키기 위해 다양한 종류의 첨가제를 사용한다. 이 중 응집제는 버력의 응집도를 높여 필터프레스의 생산성을 향상시킨다. 본 연구에서는 응집제가 투입된 후 필터프레스를 통해 걸러진 사용수에 대한 실내시험을 시행하여 재사용 가능 여부를 평가하였다.

키워드
이수식 TBM
벤토나이트
응집제
References
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Information
  • Publisher :Korean Tunneling and Underground Space Association
  • Publisher(Ko) :한국터널지하공간학회
  • Journal Title :Journal of Korean Tunnelling and Underground Space Association
  • Journal Title(Ko) :한국터널지하공간학회 논문집
  • Volume : 26
  • No :5
  • Pages :449-461
  • Received Date : 2024-07-22
  • Revised Date : 2024-08-16
  • Accepted Date : 2024-08-16
  • DOI :https://doi.org/10.9711/KTAJ.2024.26.5.449
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