All Issue

2024 Vol.20, Issue 4 Preview Page

Original Article

Evaluation of the Applicability of Direct Algorithm-Based Back Analysis Method for Retaining Walls

흙막이벽에 대한 직접알고리즘 기반 역해석 기법의 적용성 평가

이준석1ㆍ김봉수2ㆍ이강일3*

Jun-Seok Lee1, Bong-Su Kim2, Kang-Il Lee3*

1Ph.D. Candidate, Department of Civil Engineering and Environment Engineering, Daejin University, Pocheon, Republic of Korea
2Ph.D. Candidate, Department of Civil Engineering and Environment Engineering, Daejin University, Pocheon, Republic of Korea
3Professor, Department of Smart Construction and Environment Engineering, Daejin University, Pocheon, Republic of Korea
31 December 2024. pp. 761-773
PDF Citation
Abstract
Purpose: The purpose of this study is to evaluate the adequacy and field applicability of the back analysis method using the direct algorithm. By predicting the behavior of retaining walls through back analysis, this study aims to verify the effectiveness of the direct algorithm-based back analysis method. Method: Back analysis was performed using a virtual ground model assuming single and multi-layered soil conditions, with measurement values obtained from normal analysis using the elastic-plastic beam theory. Additionally, the field applicability was analyzed by conducting back analysis based on measurement results from three actual sites. Result: The back analysis method demonstrated very high accuracy in predicting ground parameters and wall behavior, particularly showing strong alignment with measurement results during the later stages of excavation. However, in cases where the ground conditions are favorable and wall displacements are minimal, the applicability of the method was found to decrease. Conclusion: The back analysis method using the direct algorithm provides valid results under most conditions, but its application may be limited depending on specific ground conditions. These findings can serve as important reference material for the future application of back analysis methods in the field of geotechnical engineering.
Keywords
Direct Algorithm
Back Analysis
Retaining Wall
Excavation Stages
Elastic-Plastic Beam Theory
연구목적: 직접 알고리즘을 이용한 역해석 기법의 적정성과 현장 적용성을 평가하여 역해석 기법을 통해 흙막이 벽체의 거동을 예측하고 이를 바탕으로 직접 알고리즘 역해석 기법의 실효성을 검증하고자 한다. 연구방법: 단일 및 다층 지반조건을 가정한 가상 지반 모델을 사용하여 역해석을 수행하였으며, 탄소성보법을 통해 얻은 결과를 계측값으로 활용하였다. 또한, 3개의 실제 현장 계측 결과를 바탕으로 역해석을 진행하여 현장 적용성을 분석하였다. 연구결과: 역해석 기법은 지반정수 및 벽체 거동 예측에서 매우 높은 정확도를 보였으며, 특히 굴착 후반 단계의 계측 결과와의 일치도가 높았다. 그러나 지층 조건이 양호하고 벽체 변위가 적은 경우에는 적용성이 떨어지는 것으로 나타났다. 결론: 직접 알고리즘을 활용한 역해석 기법은 대부분의 조건에서 타당한 결과를 제공하지만, 지반 조건에 따라 적용이 제한될 수 있다. 이러한 결과는 지반 공학 분야에서의 역해석 기법 적용 시 중요한 참고자료로 활용될 수 있을 것이다.
키워드
직접 알고리즘
역해석
흙막이 가시설
굴착단계
탄소성보법
References
  1. An, J.-S., Kim, B.-C., Moon, H.-K., Song, K.-I., Su, G.S. (2010). "DEA optimization for operation tunnel back analysis." Journal of Korea Tunnel Underground Space Association, Vol. 18, No. 2, pp. 183-193.10.9711/KTAJ.2016.18.2.183
  2. Finkel, D.E. (2003). Direct Optimization Algorithm User Guide. Center for Research in Scientific Computation, North Carolina State University, Raleigh, NC.
  3. Gioda, G., Sakurai, S. (1987). "Back analysis procedures for the interpretation of field measurements in geomechanics." International Journal for Numerical and Analytical Methods In Geomechanics, Vol. 11, pp. 555-583.10.1002/nag.1610110604
  4. Jang, C.-S., Kim, S.-S. (2002). "Application of genetic algorithm to the back analysis of the underground excavation system." Korean Geotechnical Society Fall 2002 National Conference, Seoul, Korea, pp. 65-84.
  5. Kang, S.-R. Jeon, J.-S., Lee, Y.-J., Lee, J.-S., Lee, K.-I. (2024). "Assessment of displacement and axial force of earth retaining wal at easch excavation step using direct algorithm back analysis." Journal of Korean Geosynthetics Society, Vol. 23, No. 1, pp. 27-37.
  6. Kim, Y.-J., Lee, Y.-J. (2013). "Development of a back analysis program for reasonable derivation of tunnel design parameters." Journal of Korea Tunnel Underground Space Association, Vol. 15, No. 3, pp. 357-373.10.9711/KTAJ.2013.15.3.357
  7. Korean Geotechnical Society (2018). Explanation of Structure Basic Design Standards. CIR, Seoul.
  8. Lee, S.-H., Kim, J.-M., Kim, S.-I., Chang, B.-S. (2002). "Back analysis of the earth wall in multi-layered subgrade." Journal of Korean Geotechnical Society, Vol. 18, No. 1, pp. 71-78.
  9. Lee, D.-G., Kang, K.-N., Song, K.-I. (2023). "Multi-layered ground back analysis of retaining wall using differential evolution algoritm : basic research of digital twin." Journal of the korean Geo-Environmental Society, Vol. 23, No. 1, pp. 25-30.
  10. Park, H.-J. (2014). "A study on the displacement prediction method using the inverse analysis algorithm." Journal of Korea Institute of Information and Communication Engineering, Vol. 18, No. 4, pp. 920-926.10.6109/jkiice.2014.18.4.920
  11. Park, D.-H., Park, E.-S. (2016). "Back analysis for excavation-induced ground movements using a direct search method." Journal of The Korean Society of Mineral and Energy Resources Engineers, Vol. 53, No. 2, pp. 112-121.10.12972/ksmer.2016.53.2.112
  12. Woo, J.-T. (2017). "A study on behavior of the earth retaining structure by field measurement and numerical analysis." Journal of the Society of Disaster Information, Vol. 13, No. 3, pp. 286-295.
Information
  • Publisher :The Korean Society of Disaster Information
  • Publisher(Ko) :한국재난정보학회
  • Journal Title :Journal of the Society of Disaster Information
  • Journal Title(Ko) :한국재난정보학회논문집
  • Volume : 20
  • No :4
  • Pages :761-773
  • DOI :https://doi.org/10.15683/kosdi.2024.12.31.761
Journal Informaiton Journal of the Society of Disaster Information Journal of the Society of Disaster Information
  • NRF
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close