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Analysis of Damage Cases of Reinforced Earth Retaining Walls for Expressways at the Time of Introduction 30 Years

도입 30년 시점에서 고속도로 보강토옹벽의 손상사례 분석

  • Do, Jongnam (Safety&Disaster Prevention Research Division, Korea Expressway Coporation Research Institute) ;
  • Kim, Nagyoung (Safety&Disaster Prevention Research Division, Korea Expressway Coporation Research Institute) ;
  • Kim, Myoungil (Department of Civil and Environmental Engineering, Hanyang University) ;
  • Park, Doohee (Department of Civil and Environmental Engineering, Hanyang University)
  • Received : 2020.10.30
  • Accepted : 2020.11.23
  • Published : 2020.12.01

Abstract

Reinforced earth retaining walls were developed in France in the 1970s and began to be applied in earnest to Korea in the 1990s. And now, about 1,300 reinforced soil retaining walls support the embankment of highways and bridge connections. The reinforced earth retaining wall construction technology has evolved day by day, and in recent years the reinforced earth retaining wall itself has been developed and introduced as a demonstration. However, various damages are constantly occurring in the reinforced earth retaining walls constructed throughout the highway. The cause of this was analyzed as minor defects in the design, construction, and maintenance stages. The solution for this is a change in perception of the importance of each individual process, but this does not form overnight. In this study, 30 years have passed since the introduction of the reinforced soil retaining wall on the highway, the damage cases were analyzed and categorized that have occurred in the reinforced soil retaining wall so far, and attempted to present a confrontation. As a result, the damage occurring on the reinforced soil retaining wall was divided into 10 types, and the causes and countermeasures in the design, construction, and maintenance stages for each were derived.

보강토옹벽은 1970년대 프랑스에서 개발되어 국내에는 1990년대에 본격적으로 적용되기 시작하였다. 그리고, 현재는 1,300여개의 보강토옹벽이 고속도로 성토, 교량 접속부 등을 지탱하고 있다. 보강토옹벽 시공 기술은 나날이 발전하여 최근에는 보강토옹벽 자체를 교대구물화 하는 보강토교대를 개발하고 시범 도입할 정도가 되었다. 하지만, 고속도로 곳곳에 시공된 보강토옹벽에는 다양한 손상이 꾸준히 발생되고 있다. 이에 대한 원인은 설계, 시공, 유지관리 단계에서의 소소한 결함들로 분석이 되었다. 이에 대한 해결 방안은 개별 공정 하나 하나에 대한 중요성 인지하는 인식 변화이지만, 이는 하루아침에 형성되지 않는다. 본 연구에서는 고속도로 보강토옹벽 도입 30년을 맞이하여, 지금까지 보강토옹벽에서 발생된 손상 사례를 분석하여 유형화 하고, 이에 대한 대책을 제시하고자 하였다. 그 결과, 보강토옹벽에 발생하는 손상을 10가지 유형으로 나누었고, 각각에 대한 설계, 시공, 유지관리 단계에서의 원인과 대책을 도출하였다.

Keywords

References

  1. Chae, Y. S., Kim, Y. N. and Chung, K. H. (2004), A study on the behavior of the front wave of vegetation reinforced soil retaining wall through collapse cases, Journal of the Korean Geotechnical Society, Vol. 3, No. 3, pp. 41-46.
  2. Han, J. G., Cho, S. D. and Chung, S. S. (2005), Analysis of the collapse factors of the block-type reinforced soil retaining wall considering the construction environment and a case study of countermeasures, Vol. 4, No. 3, pp. 35-43.
  3. Jin, B. I. and You, Y. G. (1986), Model experiment for reinforced soil retaining wall, Journal of the Korean Geotechnical Society, Vol. 2, No. 1, pp. 45-54.
  4. Kim, H. T., Bang, Y. K. and Cho, Y. K. (2003), Displacement analysis of geotextile reinforced earth retaining wall by temperature controlled constrained tensile test, Journal of the Korean Geotechnical Society, Vol. 19, No. 2, pp. 97-106.
  5. Korea Expressway Corporation (2017), Stability evaluation of reinforced eoil retaining walls and development of repair and reinforcement techniques, Korea Expressway Corporation Research Institute, pp. 54-97.
  6. Ministry of Land, Infrastructure and Transport (2013), Provisional guidelines for design, construction and maintenance of reinforced earth retaining walls for construction, Ministry of Land, Infrastructure and Transport, pp. 20-29.
  7. Ministry of Land, Infrastructure and Transport (2018), Detailed guidelines for safety inspection and precision safety diagnosis, Ministry of Land, Infrastructure and Transport, pp. 11-2-11-46.
  8. Yoo, C. S., Jung, H. S. and Lee, S. W. (2004), A study on the accident cases of reinforced soil retaining walls, Journal of the Korean Geotechnical Society, Vol. 3, No. 2, pp. 49-57.
  9. Yoo, N. J. (1989), Centrifugal model experiment of reinforced earth retaining wall, Proceedings of the Korean Society of Civil Engineers, pp. 423-426.
  10. Yoo, N. J. and Kim, M. G. (1991), A study on the destruction mechanism of reinforced earth retaining wall under target load, Journal of the Korean Geotechnical Society, Vol. 7, No. 4, pp. 35-47.