터널과지하공간 (Tunnel and Underground Space)

  • 제30권5호
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  • Pages.484-495
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  • 2020
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  • 1225-1275(pISSN)
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  • 2287-1748(eISSN)
한국암반공학회 (Korean Society for Rock Mechanics and Rock Engineering)
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개별요소법과 유한차분법 연계 해석을 이용한 EPB TBM 굴진해석 Part I : 모델링

Numerical Analysis of EPB TBM Driving using Coupled DEM-FDM Part I : Modeling

  • 최순욱 (한국건설기술연구원 지하공간안전연구센터) ;
  • 이효범 (고려대학교 건축사회환경공학부) ;
  • 최항석 (고려대학교 건축사회환경공학부) ;
  • 장수호 (한국건설기술연구원 건설산업진흥본부) ;
  • 강태호 (한국건설기술연구원 지하공간안전연구센터) ;
  • 이철호 (한국건설기술연구원 지하공간안전연구센터)
  • Choi, Soon-wook (Underground Space Safety Research Center, Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Hyobum (School of Civil Environmental and Architectural Engineering, Korea University) ;
  • Choi, Hangseok (School of Civil Environmental and Architectural Engineering, Korea University) ;
  • Chang, Soo-Ho (Construction Industry Promotion Department, Korea Institute of Civil Engineering and Building Technology) ;
  • Kang, Tae-Ho (Underground Space Safety Research Center, Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Chulho (Underground Space Safety Research Center, Korea Institute of Civil Engineering and Building Technology)
  • 투고 : 2020.10.23
  • 심사 : 2020.10.27
  • 발행 : 2020.10.31
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⟨ 이전 논문 다음 논문 ⟩

초록

EPB TBM의 굴진을 수치적으로 해석하기 위해 개별요소법(DEM, discrete element method), 유한요소법(FEM, finite element method), 유한차분법(FDM, finite difference method) 등과 같은 다양한 수치해석 기법이 적용되어 왔다. 본 논문에서는 이중 개별요소법과 유한차분법을 연계하는 방식을 채택하여 EPB TBM 굴진해석 모델링 방법을 제시하였다. 제시한 개별요소법-유한차분법 연계 TBM 굴진해석 모델에서 TBM이 굴착하는 굴착부는 개별요소법을 적용하였으며, 입자 접촉 물성치의 경우 일련의 삼축압축시험을 통해 교정하였다. 굴착부 주변지반은 유한차분법을 연계시켜 정지토압계수를 고려하여 굴착부에 수평지중응력을 구현할 수 있도록 하였다. 또한, 이를 통해 소요 입자 개수를 감소시켜 모델의 해석효율을 증대시켰다. 본 논문에서 제시한 수치해석 모델은 TBM의 굴진율, 커터헤드 및 스크류 컨베이어 회전속도 등을 조절할 수 있으며 TBM 굴진 중 토크, 추력, 챔버압, 배토량을 도출해 낼 수 있다.

To numerically simulate the advance of EPB TBM, various type of numerical analysis methods have been adopted including discrete element method (DEM), finite element method (FEM), and finite difference method (FDM). In this paper, an EPB TBM driving model was proposed by using coupled DEM-FDM. In the numerical model, DEM was applied in the TBM excavation area, and contact properties of particles were calibrated by a series of triaxial tests. Since the ground around the excavation area was coupled with FDM, the horizontal stress considering the coefficient of earth pressure at rest could be applied. Also, the number of required particles was reduced and the efficiency of the analysis was increased. The proposed model can control the advance rate and rotational speed of the cutter head and screw conveyor, and derive the torque, thrust force, chamber pressure, and discharging during TBM tunnelling.

키워드

참고문헌

  1. Choi, S-W., Lee, H., Choi, H., Chang, S-H., Kang, T-H., Lee, C., 2019, Study on Driving Simulation of Spoke-type Shield TBM Considering Operation Conditions, Tunnel & Underground Space, 29(6), 456-467. (in Korean) https://doi.org/10.7474/TUS.2019.29.6.456
  2. Choi, S-W., Park, B., Kang, T-H., Chang, S-H., Lee, C., 2018, Numerical Study on Medium-Diameter EPB Shield TBM by Discrete Element Method, Journal of Korean Geosynthetics Society, 17(4), 129-139. (in Korean) https://doi.org/10.12814/JKGSS.2018.17.4.129
  3. Hasanpour, R., 2014, Advance numerical simulation of tunneling by using a double shield TBM. Computers and Geotechnics, 57, 37-52. https://doi.org/10.1016/j.compgeo.2014.01.002
  4. Hu, X., He, C., Lai, X., Walton, G., Fu, W., and Fang, Y., 2020, A DEM-based study of the disturbance in dry sandy ground caused by EPB shield tunneling. Tunnelling and Underground Space Technology, 101, 103410. https://doi.org/10.1016/j.tust.2020.103410
  5. Kim, K., Oh, J., Lee, H., Kim, D., and Choi, H., 2018, Critical face pressure and backfill pressure in shield TBM tunneling on soft ground, Geomechanics and Engineering, 15(3) 823-831. https://doi.org/10.12989/GAE.2018.15.3.823
  6. Itasca, 2019, Particle Flow Code in 3 Dimensions (PFC3D) 6.0 documentation, Minneapolis: Itasca Consulting Group.
  7. Itasca, 2020, Fast Lagrangian Analysis of Continua in 3 Dimensions (FLAC3D) 7.0 documentation, Minneapolis: Itasca Consulting Group.
  8. Lambrughi, A., Rodriguez, L. M., and Castellanza, R., 2012, Development and validation of a 3D numerical model for TBM-EPB mechanised excavations, Computers and Geotechnics, 40, 97-113. https://doi.org/10.1016/j.compgeo.2011.10.004
  9. Lee, C., Chang, S-H., Choi, S-W., Park, B., Kang, T-H., Sim, J. K., 2017a, Numerical Study of Face Plate-Type EPB Shield TBM by Discrete Element Method, Journal of Korean Geosynthetics Society, 16(4), 163-176. (in Korean) https://doi.org/10.12814/JKGSS.2017.16.4.163
  10. Lee, C., Chang, S-H., Choi, S-W., Park, B., Kang, T-H., Sim, J. K., 2017b, Preliminary study on a spoke-type EPB shield TBM by discrete element method, Journal of Korean Tunnelling and Underground Space Association, 19(6), 1029-1044. (in Korean) https://doi.org/10.9711/KTAJ.2017.19.6.1029
  11. Lee, G-J., Kim, H., Kwon, T-H., Cho, G-C., Kang, S-H., 2019a., DEM numerical study for the effect of scraper direction on shield TBM excavation in soil, Journal of Korean Tunnelling and Underground Space Association, 21(5), 689-698. (in Korean) https://doi.org/10.9711/KTAJ.2019.21.5.689
  12. Lee, G-J., Kwon, T-H., Kim, H., 2019b., DEM-based numerical study on discharge behavior of EPB-TBM screw conveyor for rock, Journal of Korean Tunnelling and Underground Space Association, 21(1), 127-136. (in Korean) https://doi.org/10.9711/KTAJ.2019.21.1.127
  13. Maynar, M. J., Rodriguez, L. E., 2005, Discrete numerical model for analysis of earth pressure balance tunnel excavation, Journal of geotechnical and geoenvironmental engineering, 131(10), 1234-1242. https://doi.org/10.1061/(ASCE)1090-0241(2005)131:10(1234)
  14. Nematollahi, M., and Dias, D., 2019, Three-dimensional numerical simulation of pile-twin tunnels interaction-Case of the Shiraz subway line, Tunnelling and Underground Space Technology, 86, 75-88. https://doi.org/10.1016/j.tust.2018.12.002
  15. Qu, T., Wang, S., and Hu, Q., 2019, Coupled discrete element-finite difference method for analysing effects of cohesionless soil conditioning on tunneling behaviour of EPB shield, KSCE Journal of Civil Engineering, 23(10), 4538-4552. https://doi.org/10.1007/s12205-019-0473-8
  16. Wang, J., He, C., and Xu, G., 2019, Face Stability Analysis of EPB Shield Tunnels in Dry Granular Soils Considering Dynamic Excavation Process, Journal of Geotechnical and Geoenvironmental Engineering, 145(11), 04019092. https://doi.org/10.1061/(ASCE)GT.1943-5606.0002150