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Research Article

Inspection Report of Internal Tendons Condition Assessment in PSC Girder Bridge

PSC 일반거더교 내부텐던 상태조사 보고

Ki-Hyun Kim1
,
Seok-Goo Youn2
,
Beom-Jin Cha3
,
Jung-Dong Lee4
,
Eun-Jin Kim5
,
Sang-Ah Kim6
,
Hwa-Jun Lee7*
김 기현1
,
윤 석구2
,
차 범진3
,
이 정동4
,
김 은진5
,
김 상아6
,
이 화준7*
1C.E.O, Contek E&C Co., Ltd., SeongNam 13503, Rep. of Korea
2Professor, Department of Civil Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea
3Director Road Facilities Department, Seoul Facilities Corporation, Seoul 04704, Rep. of Korea
4Director Asset Management Innovation, Seoul Facilities Corporation, Seoul 04704, Rep. of Korea
5Team Manager Asset Management Innovation, Seoul Facilities Corporation, Seoul 04704, Rep. of Korea
6Assistant Director Asset Management Innovation, Seoul Facilities Corporation, Seoul 04704, Rep. of Korea
7Manager, Contek E&C Co., Ltd., SeongNam 13503, Rep. of Korea
1컨텍이앤씨(주) 대표이사
2울과학기술대학교 교수
3서울시설공단 도로시설처 처장
4서울시설공단 자산관리혁신처 처장
5서울시설공단 자산관리혁신처 팀장
6서울시설공단 자산관리혁신처 차장
7컨텍이앤씨(주) 과장
*Corresponding Author
31 December 2024. pp. 94-108
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Abstract

In 2020, the internal tendon of Cheongdam 1’st Bridge, a PSC-I bridge, was found to be severely corroded, and an internal tendon condition inspection was conducted on twenty PSC general girder bridges managed by the Seoul Facilities Corporation. This paper describes the background of the internal tendon condition inspection of PSC general girder bridges, the method and procedure of the inspection of the side, spalling, and Anchorage zone, and also presents the inspection method of PSC-Slab bridges. The results of the inspection of PSC general girder bridges conducted for three years from 2021 to 2023 showed major defects, and the defect analysis showed that construction quality control is the most important defect factor. In addition, the need for continuous investigation and improvement of non-destructive testing technology for efficient maintenance of internal tendons was presented, and the repair method for defective parts was presented.

Keywords
PSC girder bridge
Non-destructive Test (NDT)
Internal tendon
Anchorage

2020년 PSC-I형교인 청담1교 내부텐던의 심각한 부식이 발견되어 서울시설공단에서 관리하고 있는 PSC 일반거더교량 20개에 대해 내부텐던 상태조사를 시행하였다. 이 논문에서는 PSC일반거더교 내부텐던 상태조사 추진 경위, 측면, 파취, 정착구 조사 방법 및 절차를 설명하였으며 PSC-Slab교의 조사 방법도 제시하였다. 그리고, 2021년부터 2023년까지 3년간 수행한 PSC 일반거더교량에 대한 조사 결과를 주요 결함 상태를 보였으며 결함 분석을 통해 시공품질관리가 가장 중요한 결함인자임을 제시하였다. 또한, 내부텐던의 효율적인 유지관리를 위해 지속적인 조사 필요성과 비파괴조사기술 향상의 필요성을 제시하였으며, 결함부에 대한 보수방법을 제시하였다.

키워드
PSC일반거더교
비파괴조사
내부텐던
정착구
References
1

Kim, K. H., Yoon, S. B. and Yoon, S. G. (2019) The Corrosion of Post-tension Tendons and Grouting Technology Can be Described as Follows. Journal of the Korea Concrete Institute 31(4), 18-23.

2

Seoul Facilities Corporation (2017) Establishment of a Maintenance Management Plan for Prestressed Concrete Box Girder Bridges in Seoul City. Summary Report, pp. 124-135.

3

Seoul Facilities Corporation (2020) Investigation and Monitoring of Prestressed Concrete Box Girder Bridges on the Naebu Expressway. Interim Report, pp. 168-177.

4

Seoul Facilities Corporation (2021) PSC Box Girder Bridge Internal Tendon Maintenance Improvement Service. First Annual Report, pp. 336-356.

5

Seoul Facilities Corporation (2023) 2023 PSC Girder Bridge Internal Tension Member Micro-Destruction Investigation Servicet. Final Report, pp. 182-192.

6

Seoul Facilities Corporation and Korean Concrete Institute (2023) PT Tendon Grouting Construction Guidelines. Report, pp. 28-32.

7

Theryo, S. T., Hartt, H. W. and Paczkowski, P. (2013) Guidelines for Sampling, Assessing, and Restoring Defective Grout in Prestressed Concrete Bridge Post-Tensioning Ducts. Federal Highway Administration (FHWA), FHWA-HRT-13-028.

8

Woodward, R. J. (1981). Conditions within ducts in post-tensioned prestressed concrete bridge. LR 980, Transport and Road Research Laboratory, Department of Transport, Crowthorne, Berkshire, UK.

9

Youn, S. G. and Kim, E. K. (2006) Deterioration of Bonded Post-Tehsioned Concrete Bridge and Research Topics on The Strength Evaluation in ISARC. Proceedings of JSCE-KECE Joint Seminar on Maintenance and Management Strategy of Infrastructure in Japan and Korea, Shiga, Japan, pp. 49-63.

10

寺田典生 (JPCI) (2016) プレストレストコンクリート橋におけるPCグラウト充塡狀況に着目した維持管理のあり方に關する硏究. 博士論文, 京都大學. 日本.

Information
  • Publisher :Korean Institute of Bridge and Structural Engineers
  • Publisher(Ko) :한국교량및구조공학회
  • Journal Title :Journal of Structure Research and Practice
  • Journal Title(Ko) :한국교량및구조공학회 논문집
  • Volume : 2
  • No :2
  • Pages :94-108
  • Received Date : 2024-05-28
  • Revised Date : 2024-12-19
  • Accepted Date : 2024-12-19
  • DOI :https://doi.org/10.22725/JSRP.2024.2.2.94
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