Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
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Assessment of Displacement and Axial Force of Earth Retaining Wall at Each Excavation Step Using Direct Algorithm Back Analysis

직접알고리즘 역해석 기법을 이용한 굴착단계별 흙막이 가시설 변위 및 축력의 적정성 평가

  • So-Ra Kang (Civil Engineering Business Team, Midas IT) ;
  • Je-Seok Jeon (Construction SW Business Department, Midas IT) ;
  • Yeong-Jin Lee (Dept. of Civil and Environment Engineering, Daejin Univ.) ;
  • Jun-Seok Lee (Dept. of Civil and Environment Engineering, Daejin Univ.) ;
  • Kang-Il Lee (Dept. of Smart Construction and Environmental Engineering, Daejin Univ.)
  • Received : 2024.02.06
  • Accepted : 2024.03.05
  • Published : 2024.03.30
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Abstract

In this study, direct algorithm-based back analysis was utilized to perform back analysis on two actual earth retaining wall fields, which was then compared with genetic algorithm-based method to evaluate the suitability of the back analysis. Additionally, in order to propose effective utilization methods of the program, the measurement data, as the input for the back analysis, was varied for each excavation step, and the applicability of the back analysis results(displacement, axial force) was examined. The research findings indicate that both direct algorithm and genetic algorithm show high applicability; however, the optimization for this program is better predicted by the direct algorithm. Moreover, in order to effectively use the back analysis program employing the direct algorithm, it was evaluated that relatively accurate prediction of the earth retaining wall behavior could be achieved by inputting measurement data from the 7th excavation step for fields with final excavation steps ranging from 8 to 11.

본 연구에서는 직접 알고리즘이 적용된 역해석 기법을 이용하여 실제 흙막이 벽체 현장 2개소를 대상으로 역해석을 수행하였으며 이를 유전알고리즘과 비교하여 역해석 기법의 적정성을 평가하였다. 또한, 프로그램의 효과적인 활용방안을 제시하기 위해 역해석 입력값인 계측 데이터를 굴착단계별로 다르게 입력한 후 역해석 결과(변위, 부재력)의 적용성을 검토하였다. 연구 결과, 직접알고리즘과 유전알고리즘 모두 적용성이 높으나 본 프로그램에 대한 최적화는 직접알고리즘이 더 잘 예측되는 것으로 평가되었다. 또한 직접알고리즘이 적용된 역해석 프로그램을 효과적으로 사용하기 위해서는 최종 굴착단계가 8단계~11단계인 현장을 대상으로 7단계 굴착시의 계측데이터를 입력할 경우 비교적 정확한 흙막이 거동을 예측할 수 있는 것으로 평가되었다.

Keywords

References

  1. Akutagawa, S. Meek, J.L. and Brown, E.T. (1991), "The Back Analysis of In-situ Stresses in a Multiple Stage Excavation Problem", Computer Methods and Advances in Geomechanics Balkema, Rotterdam, pp.937-942.
  2. An, J.S.,, Kim, B.C., Moon, H.K., Song, K.I. and Su, G.S. (2016), "DEA optimization for operating tunnel back analysis", Journal of Korean Tunnelling and Underground Space Association, Vol.18, No.2 pp.183-193. https://doi.org/10.9711/KTAJ.2016.18.2.183
  3. Bieniawski, Z.T. (1989), Engineering rock mass classifications, John Wiley & Sons, pp.51-72.
  4. Chang, B.S., Lee, S.H., Kim, J.M. and Kim, S.I. (2003), "Back Analysis of Earth Retaining Wall Using Increment of Sequential Displacement", Journal of Korean Geotechnical Society, Vol.19, No.5 pp.7-14.
  5. Do, J.N., Wrryu, W.R., An, Y.H. and Chun, B.S. (2010), "Field Measurement and Numerical Approach for Lateral Deformation of Retaining Wall", Journal of the Korean Geo-Environmental Society, Vol.11, No.2, pp.61-68.
  6. Finkel, D. (2003), Direct Optimization Algorithm User Guide, North Carolina State University Center for Research in Scientific Computation, Center for Research in Scientific Computation Technical Report, CRSC-TR03-11.
  7. Gioda, G. and Jurina, L. (1981), "Numerical Identification of Soil-Structure Interaction Pressures", International Journal of Numerical Analysis Methods in Geomechanics, Vol.5, pp.33-56.
  8. Gioda, G. and Sakurai, S. (1987), "Back Analysis Procedures for the Interpretation of Field Measurements in Geomechanics",International Journal of Numerical Analysis Methods Geomechanics, Vol.11, pp.555-583.
  9. Holland, J.H. (1975), Adaptation in Natural and Artificial System, The University of Michigan Press.
  10. Jang, C.S. (2002), Application of Genetic Algorithm to the Back Analysis of the Underground Excavation System, Ph.D. Dissertation, Graduate School of Chungang University, Korea.
  11. Jang, C.S. and Kim, S.S. (2002), "Application of genetic Algorithm to the Back Analysis of the Underground Excavation System", Journal of the Korean Geotechnical Society, Vol.2002, pp.109-128.
  12. Kang, S.R., Jeon, J.S., Lee, J.S. and Lee, K.I. (2023), "A Study of Back Analysis on the Retaining Walls Using Direct Algorithm", 2023 Korean Geo-Environmental Society Conference, pp.61-62.
  13. Kim, J.Y., Park, U.Y., Kim, G.H. and Kim, J.K. (2004), "A Study on the Selection Model of Retaining Wall Method Using Case-Based Reasining", Korean Journal of Construction Engineering and Management, Vol.5 No.5, pp.76-83.
  14. Kim, Y.J. and Lee, Y.-J. (2013), "Development of a Back Analysis Program for Reasonable Derivation of Tunnel Design Parameters", Journal of the Korean Tunnelling and Underground Space Association, Vol.15, No.3, pp.357-373.
  15. Kim. G.H., Lee, Y.S., Kim, H.K., Her, N.I., Sa, J.W., Yang, H.L., Kim, B.C. and Bak, J.S. (2003), "Study of Supporting Location Optimization for a Structure under Non-uniform Load Using Genetic Algorithm", Korean Society of Mechanical Engineers 2003 Fall Conference, pp.1322-1327.
  16. Kwon, O.S., Chung, C.K., Kim, J.K., Lee, H.S. and Kim, M.M. (1999), "Development and Application of Construction Control System for Excavation", Journal of Korean Geotechnical Society, Vol.15, No.4 pp.153-166.
  17. Lee, K.J., Lee, S.J. and Yoon, H.S. (2006), "A Verification for Determination of Soil Properties Using Field Measurement and Back Analysis", Journal of the Korean Geo-Environmental Society, Vol.7, No.5, pp.5-11.
  18. Oh, J.H. (2001), Development of Total Management System Using Observational Method for Earth Retaining Structures under Ground Excavation, Graduate School of Kyunghee University, Korea.
  19. Park, H.J. (2014), "A Study on the Displacement Prediction Method using the Inverse Analysis Algorithm", Journal of The Korea Institute of Information and Communication Engineering, Vol.18, No.4, pp.920-926.
  20. Yun, Y.M. (2019), "Development of Site Management System for Temporary Facility Construction Using Back Analysis", Journal of the Society of Disaster Information, Vol.15, No.4, pp.570-577. https://doi.org/10.15683/KOSDI.2019.12.31.570