DOI QR코드

DOI QR Code

A case study on the lateral movement of bridge abutment foundation and repair methods

교대의 측방변위와 대책공법에 대한 사례연구

  • Lee, Byung-Suk (Infrastructure civil Engineering Department, Chonbuk University) ;
  • Lee, Jae-Yeol (Construction Quality Testing Center, Co.)
  • Received : 2011.12.15
  • Accepted : 2012.03.08
  • Published : 2012.03.31

Abstract

In the case of using pile foundation to support bridge abutments on soft ground, the soft ground often causes serious troubles such as lateral movement of bridge abutments by lateral surcharges. In this paper, we investigated and measured the amount of strain of a bridge abutment in the south-western part of Korea. To check the stability and possibility of lateral movement of the bridge abutment, we used the four analysis methods and compared those results; lateral movement index, index for decision of lateral movement and infinite element analysis method. We performed soil and ground tests to fine the causes of the strain and lateral movement. After reviwing several types of repair methods, we suggested the anker reinforcement method along with surcharge process method as a proper repair and rehabilitation of the bridge abutment. Our investigation by through the infinite element analysis method confirmed the effectiveness of the anker reinforcement method allong with the surcharge process method.

연약지반 상에 설치하는 교대의 말뚝기초는 편재하중으로 인하여 교대의 측방변위가 발생하는 경우 사례가 자주 있다. 본 연구에서는 측방변위가 발생된 국내 ${\bigcirc}{\bigcirc}$교량의 측방유동에 대하여 측방유동지수(F)에 의한 판정법, 측방유동판정수(I), 수정 I지수($M_I$)법에 의한 판정법과 유한요소법으로 판정하였다. 또한 계측관리를 통하여 측방유동의 진행성과 일련의 지반조사, 토질시험을 통하여 측방유동의 원인을 분석한 결과 설계시 예측하였던 압밀에 의한 전단 강도의 증가가 적어 전단강도의 부족으로 인하여 측방유동이 발생한 것으로 판단되었다. 보강방안으로는 압성토와 앵커보강을 병용하는 방안을 선정하였고 그 효용성을 유한요소법을 이용한 수치해석으로 확인하였다.

Keywords

References

  1. Peck R.B., Hanson,W.E. &Thornburn, T.H., "Foundation Engineering" John Wiley &Son, New York, 1974
  2. De Beer, E & Wallays, M.,"Forces induced in piles by Unsymmetrical Surcharges on the soils around the piles", 5th ECSMFE, McGraw Hill Peck R.B., Hanson,W.E. &Thornburn, T.H., "Foundation Engineering" John Wiley &Son, New York, pp.325-332, 1974
  3. Tschebotarioff, G.P., "Foundation, Retaining and Earth Structures" McGraw Hill Kogaku놈, @nd edition, pp.365-414, 1973
  4. Poulos, H.G., "Analysis of piles soils undergoing Lateral Movement", J.ASCE VOL.99, No.SM5, pp.391-406, 1973
  5. Hong,Won-Pyo․Song, Young-Suk․Yun-Jung-Mann․ Lee-Seung-Joo, "Case study on Lateral Movement of Bridge Abutment on Soft Ground" Journal of the Korean Geotechnical Society, Vol.10, No.4, pp.53-65 1994.
  6. Korea Expressway Corporation, "A study on Protection Method for Lateral Movement of Abutment(II)" 1996
  7. Kimurakou, "A countermeasure against Lateral Movement of Bridge Abutment on Soft Ground" Soil and Foundation, Vol.30, No.5, pp.33-40, 1982
  8. Express Highway Research Foundation of Japan, "The Research Report on Lateral Movement of Bridge Abutment", 1981.
  9. Public Works Research Institute, "Study on Lateral Movement of Bridge Abutment" PWRI Research Materials, No.1804, 1981
  10. Kim, Young-Ho․Kim, Hyoung-Tak․Hoang, In-Bea k․Sin, Yong-Seok, "A study on the Countermeasures of Lateral Movement of Bridge Abutment and Bank on Soft Ground through Causual Analysis" Korea Infrastructure Safety & Technology Corporation, No.23, pp96-113, Autumn, 2006.
  11. Yong-Chai Jang, Young-Cheol Choi, "A study on Application of Discriminent Equations in Korea", Korean Geotechnical Society 96 Fall national conference pp.249-256, 1996
  12. Jin-Hyung Lee, Jung-Ju Suh,Sang-Seom Jeong, Bhum-Soo Jang, "The Behavior of Poled Bridge Abutments Subjucted to Lateral Soil Movements -Design Guidelines-" Journal of the Korean Geotechnical Society, Vol.10, No.4, pp.53-65 1994.