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비개착 강관압입공법의 지표침하 예측방법 연구

A Study on Surface Settlement Prediction Method of Trenchless Technology Pipe Jacking Method

  • Chung, Jeeseung (Department of Construction Engineering, Dongyang University) ;
  • Lee, Gyuyoung (Department of Construction Engineering, Dongyang University)
  • 투고 : 2015.09.09
  • 심사 : 2015.10.20
  • 발행 : 2015.11.01

초록

최근 급격한 도시화로 인한 신도시, 택지개발지구 등의 증가로 기존 구조물 하부를 통과하는 비개착 강관압입공법의 적용이 증가하는 추세이다. 비개착공법은 시공 중 기존구조물의 정상적인 운영 안정성이 확보되어야 하므로 강관압입에 의한 지표침하의 정밀한 예측이 필수적으로 필요한 공법이다. 강관압입 시 침하를 발생시키는 원인은 강관 선단과 강관과의 직경차에 의한 공극, 원활한 강관압입을 위한 과굴착, 강관과 지반과의 마찰에 의한 공극 발생 등이 있으며, 이는 Shield TBM 시공 시 발생하는 침하 원인과 유사하다. 본 연구에서는 Shield TBM의 침하 예측방법인 Gap Parameter Method와 Volume Loss Method를 이용하여 강관압입 시 침하를 예측하였으며, 현장시험을 통하여 예측방법에 대한 비교 분석을 수행하였다. 그 결과 Volume Loss 예측방법이 현장시험과 가장 유사한 결과로 나타났으나, 추후 예측방법의 Factor 결정 및 비개착공법 전체 침하예측을 위한 적용성 등 추가적인 연구가 필요할 것으로 판단된다.

Non-excavation method is needed to secure the stability of existing structures during construction. Therefore, prediction of ground settlement is essential. Causes of settlement when using steel pipe indentation method are leading pipe-steel pipe gap, excessive excavation and soil-steel pipe friction etc. Also they are similar to the causes of settlement when using Shield TBM during construction. In this study, ground settlement during steel pipe indentation is predicted by the Gap Parameter Method and Volume Loss Method which are kinds of Shield TBM prediction Method. and compared with those of prediction methods by conducting field test. As a result, Volume Loss Prediction Method is the most similar to the field tests. However, It is needed to additional studies, such as decision of the factors and adaptability for total settlement predictions of non-excavation method.

키워드

참고문헌

  1. 신종호 (2002), 터널의 수치해석에 적용하는 하중분담율을 결정하는 방법, 한국지반공학회지, 제18권, 제2호, pp. 83-88.
  2. 한국도로공사 (2012), 비개착 횡단공사 관리체계 개선방안, 2012년도 고속도로 설계 실무자료집, pp. 18-27.
  3. 한국철도시설공단 (2010), 고속철도 지하횡단구조물 공법기준 정립 및 안정성평가 연구, 한국철도기술연구원 연구보고서, p. 382.
  4. Attewell, P. B. and Woodman, J. P. (1982), Predicting the dynamics of ground settlement and its derivatives caused by tunnelling in soil, Ground Engineering Vol. 15, pp. 13-22.
  5. Attewell, P. B., Yeates, J. and Selby, A. R. (1986), Soil movements induced by tunnelling and their effects in pipelines and structures, Blackie, pp. 325.
  6. Cui, J., Yoon, J. N., Eum, K. Y., Hong, S. N. and Park, S. K. (2011), An experimental study on flexural behavior in framed structure of P.S.T method, Journal of the Korea institute for Structural maintenance and inspection, Vol. 15, No. 2, pp. 144-152 (in Korean). https://doi.org/10.11112/jksmi.2011.15.2.144
  7. Glossop, N. H. and Farmer, I. W. (1979), Settlement associated with removal of compressed air pressure during tunnelling in alluvial clay, Geotechnique, Vol. 29, No. 1, pp. 67-72. https://doi.org/10.1680/geot.1979.29.1.67
  8. Jung, K. H., Jung, S. T., Kim, D. H., Kim, J. S., Hwang, Y. C. and Park, M. G. (2009), The design and construction with the JES method used steel elements for under pass in korea and the practical use of the JES method, 2009 Spring Conference Journal of the Korean Society for Railway, pp. 1498-1508 (in Korean).
  9. Kim, D. Y., Lee, H. S. and Sim, B. K. (2012), Development of trenchless tunneling method using pressurizing support and its field application, Journal of the Korean Geotechnical Society, Vol. 28, No. 7, pp. 17-30 (in Korean). https://doi.org/10.7843/kgs.2012.28.7.17
  10. Lee, H. S., Lee, J. S., Bang, C. S. and Kim, Y. T. (2004), A numerical study on reinforced effect of the railway tunnel by umbrella arch method, 2004 Spring Conference Journal of the Korean Society for Railway, pp. 164-169 (in Korean).
  11. Lee, K. M., Rowe, R. K., and Lo, K. Y. (1992), Subsidence owing to tunnelling. I. Estimating the gap parameter, Canadian Geotechnical Journal, Vol. 29, No. 6, pp. 929-940. https://doi.org/10.1139/t92-104
  12. Peck, R. B. (1969), Deep excavations and tunnels in soft ground, Proceedings of the 7th International Conference on Soil Mechanics and Foundation Engineering, Mexico City, State of the Art Volume pp. 225-290.
  13. Um, K. Y., Jung, H. C. and Kim, J. H. (2001), The analysis of ground behavior on the crossing construction under railroad using in-door model experiment, 2001 Autumn Conference Journal of the Korean Society for Railway, pp. 540-545 (in Korean).