DOI QR코드

DOI QR Code

PBD공법이 적용된 연약지반에서 운용 중인 시설물의 잔류침하거동

Residual Settlement Behavior in Soft Ground Improved by PBD during Operating Facilities

  • Kang, Gichun (Dam & Watershed Maintenance Department, K-water) ;
  • Kim, Taehyung (Department of Civil Engineering, Korea Maritime and Ocean University) ;
  • Jeong, Choonggi (Samsung Engineering and Construction Company)
  • 투고 : 2014.04.17
  • 심사 : 2014.05.29
  • 발행 : 2014.08.01

초록

항만 터미널 부두 지역의 연약지반 개량을 위해 PBD가 적용되었다. 본 논문은 PBD가 적용된 연약지반에서 PBD가 설치된 직후부터 상부 구조물 운용 후의 잔류침하거동에 대해서 다루고 있다. 기존의 연구는 개량공법 시공 중에 발생하는 침하, 즉 PBD 개량 효과에 대해 주로 이루어졌다. 실제 시설물의 운용 중에 발생하는 잔류침하는 시설물의 유지 및 운용을 위해서는 아주 중요한 요소이나 이 부분에 대한 연구는 매우 부족한 실정이다. 본 연구에서는 실제로 운용 중에 있는 항만 터미널 부두의 침하량 계측결과를 분석하여 운용 중에 발생한 침하량은 PBD 개량층에서 발생하는 것을 확인하였다. 또한 계측값과 수치해석 값을 비교한 결과 계측값이 수치해석에 의해 예측된 잔류침하량 내에서 수렴하는 것도 확인하였다.

The Plastic Board Drain is used to improve soft soils deposited in container terminal area at a port. This paper describes settlement behavior of soft ground in this area from PBD installation to the time of operating facilities. Previous researches focused on soil improvement effect of PBD, that is, the settlement occurred during ground improvement period. The residual settlement occurred during operating the facility is very important from the maintenance and management point of view. However, the study of this residual settlement has been rarely conducted. In this study, by analyzing the measured settlement data obtained from the container terminal area at the port, it was verified that the residual settlement induced during operating facilities occurred in a layer with PBD improvement. In addition, by comparison the settlement predicted by a numerical analysis with the settlement measured in the field, it was confirmed that the actual settlement is in the range of predicted settlement.

키워드

참고문헌

  1. Balasubramaniam, A. S., Cai, H., Zhu, D., Surarak, C. and Oh, E. Y. N. (2010), Settlements of embankments in soft soils, Geotechnical Engineering Journal of the SEAGS & AGSSEA, Vol. 41, No. 2, pp. 1-19.
  2. Byun, K. J., Lee, B. G., Kim, T. H. and Son, J. H. (2006), A case study on the improvements of soft ground using PBD method in Pusan New Port., The Fall 2006 Geosynthetics Conference, pp. 63-73 (in Korean).
  3. Byun, Y. S., Ahn, B. J. and Chun, B. S. (2009), A study on the soft ground improvement in deep depth by application of PBD method using model test, Journal of Korean Geo-Environmental Society, Vol. 10, No. 6, pp. 69-77 (in Korean).
  4. Han, B. W. (2005), A case study on settlement predictions of marine clay improved by plastic board drain method, Master's thesis, Chungang Univ. pp. 9-14 (in Korean).
  5. Long, P. V. (2005), Existing problems of design criteria for highway embankments on soft ground in Vietnam, Proceeding of The 9th Conference on Science and Technology, Section Civil Engineering, Ho Chi Minh City, pp. 733-738.
  6. Long, P. V., Bergado, D. T., Nguyen, L. V. and Balasubramaniam, A. S. (2013), Design and performance of soft ground improvement using PVD with and without vacuum consolidation, Geotechnical Engineering Journal of the SEAGS & AGSSEA, Vol. 44, No. 4, pp. 36-51.
  7. Mesri, G. (2001), Primary compression and secondary compression, Proc. Soil Behavior and soft Ground construction, Geotech. Spec. Publ. Issue 119, ASCE, pp. 122-166.
  8. Mersri, G. and Castro, A. (1987), Ca/Cc concept and K0 during secondary compression, Journal of Geotechnical Engineering, ASCE Vol. 112, No. 3, pp. 230-247.
  9. Mesri, G. and Vardhanabhuti, B. (2005), Secondary compression, Journal of Geotechnical and Geoenvirinmental Engineering, ASCE, Vol. 131, No. 3, pp. 398-401. https://doi.org/10.1061/(ASCE)1090-0241(2005)131:3(398)
  10. Son, J. H., Kim, J. Y., Byun, K. J., Lee, B. G., You, S. K. and Kim, T. H. (2006), A case study on the improvements of soft ground using PBD method in Pusan New Port, Journal Korean Geosynthetics Society, Vol. 5, No. 4, pp. 1-10 (in Korean).
  11. You, S. K., Hong, W. P. and Yoon, G. L. (2003), Study on consolidation behaviors of soft ground by plastic board drain using model tests, Journal of Korean Geo-Environmental Society, Vol. 4, No. 4, pp. 17-23 (in Korean).