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Original Article

Seismic Risk Assessment on Buried Electric Power Tunnels with the Use of Liquefaction Hazard Map in Metropolitan Areas

액상화 재해지도를 이용한 수도권 전력구 매설지반의 지진시 위험도 평가

Woohyun Baek1
,
Jaesoon Choi2*
백 우현1
,
최 재순2*
1Graduate student, Department of civil engineering, Seoul National University of Science and Technology
2Professor, Department of civil and architecture engineering, Seokyeong University
1서울과학기술대학교 토목공학과 박사과정
2서경대학교 토목건축공학과 부교수
*Corresponding Author
31 March 2019. pp. 45-56
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Abstract

In this study, the seismic risk has been evaluated by setting the bedrock acceleration to 0.154g which, was taking into consideration that the earthquake return period for the buried electric power tunnels in the metropolitan area to be 1,000 years. In this case, the risk assessment during the earthquake was carried out in three stages. In the first stage, the site classification was performed based on the site investigation data of the target area. Then, the LPI(Liquefaction Potential Index) was applied using the site amplification factor. After, candidates were selected using a hazard map. In the second stage, risk assessment analysis of seismic response are evaluated thoroughly after the recalculation of the LPI based on the site characteristics from the boring logs around the electric power area that are highly probable to be liquefied in the first stage. The third Stage visited the electric power tunnels that are highly probable of liquefaction in the second stage to compensate for the limitations based on the borehole data. At this time, the risk of liquefaction was finally evaluated based off of the reinforcement method used at the time of construction, the application of seismic design, and the condition of the site.

Keywords
Liquefaction hazard map
Electric power tunnel
Liquefaction potential index
Site response analysis
Risk assessment

본 연구는 수도권 지역의 전력구 매설지반을 대상으로 지진 재현주기 1,000년을 고려한 최대기반암가속도 0.154g로 설정하여 지진시 위험을 평가하였다. 이때, 지진시 위험도 평가는 총 3단계로 진행하였으며 1단계는 대상지역의 지반조사 정보를 기초로 지반분류를 우선 실시한 후, 액상화 발생가능성을 파악할 수 있는 Macro영역 기법인 지반증폭계수를 이용한 액상화 발생가능지수(LPI, Liquefaction Potential Index) 재해지도를 이용하여 후보지를 선정한다. 2단계 위험도 평가는 1단계 평가에서 액상화 발생가능성이 매우 높게 판정된 전력구 주변의 시추주상도를 바탕으로 부지특성을 반영한 지진응답해석을 수행하고 이를 토대로 액상화 발생가능성 지수를 재산정하여 지진시 액상화 위험도를 상세평가 하였다. 3단계는 시추공자료를 기반으로 하는 한계성을 보완하기 위하여 2단계에서 액상화 발생가능성이 높게 평가된 대상 전력구의 현장조사를 실시하여 건설시 보강공법적용, 내진설계적용 및 현장상태 등을 고려하여 최종적으로 액상화 위험도를 평가하였다.

키워드
액상화 재해지도
전력 공동구
액상화발생가능지수
지진응답해석
위험도평가
References
1
Baek, W. H. (2014). Development of Real-Time Liquefaction Hazard map using Metropolitan area site information data. University of Seokyeong. Seoul. Korea.(in Korean)
2
Baek, W. H., Choi, J. S., and Ahn, J. K. (2018). Liquefaction Hazard Map in Pohang Based on Earthquake Scenarios. Journal of Earthquake Engineering Society in Korea. 22(3): 219-224. (in Korean)
10.5000/EESK.2018.22.3.219
3
Choi, J. S., Park, I. J., Hwang, K. M., and Jang, J. B. (2018). A Study on Seismic liquefaction risk map of Electric power utility tunnel in South-East Korea. Journal of the Korean Geo-Environmental Society. 19(10): 13-19. (in Korean)
4
Cho, J. Y., Lee, J. H., Park, Y. B., and Lee, J. B. (2015). Frame for the implementation of a program developed based on the improved seismic performance evaluation techniques of existing structure. Architecture Institute of Korea, Fall conference of the Architecture Institute of Korea. 35: 517-518. (in Korean)
5
European Committee for Standardization. (1998). Eurocode8, Report, European Committee for Standardization. Brussels. Belgium. pp. 33-35.
6
Her, J. H. and Kim. J. H. (2011). Some Thoughts on the seismic performance evaluation procedure of urban railway infrastructures. Korean Society for Railway. KSR2018F002, pp.1539-1543. (in Korean)
7
Idriss, I. M. and Sun, J. I. (1997). User's Manual for SHAKE91, Center for Geotechnical Modeling Department of Civil & Environment Engineering University of California. Davis. C.A. pp. 1-11.
8
Iwasaki, T., Tatsuoka, K., Tokida, F., and Yasuda, S. (1978a). A Practical Method for Assessing Soil Liquefaction Potential Based on Case Studies at Various Sites in Japan. Proceedings of 2nd International Conference on Microzonation. National Science Foundation UNESCO. San Francisco. C.A. 2: 885-896.
PMC414144
9
Iwasaki, T., Tokida, K., Tatsuoka, F., Watanabe, S., Yasuda S., and Sato, H. (1982). Microzonation for soil liquefaction potential using simplified methods. Proceedings of 3rd International Conference on Microzonation. Seattle. pp.1319-1330.
10
Korean Electric Power Cooperation, (2003), Seismic Design Guideline for Electric Power Facilities. (in Korean)
11
Ku, T. J. (2010). Development of Mapping of Liquefaction Hazard Considering Various Ground Condition in Korea. Master's thesis. Seokyeong University. pp. 38-48. (in Korean)
12
Kwak, C. W. (2001). A Study on the Liquefaction Hazard Micro zonation at Reclaimed Ports and Harbors in Koera. Master's thesis. Yonsei University. pp. 20-81 (in Korean)
13
Kwak, M. C., Ku, T. J., and Choi, J. S.(2015), Development of Mapping Method for Liquefaction Hazard in Moderate Seismic Region Considering the Uncertainty of Big Site Investigation Data. J. of the Korean Geo-Environmental Society. 16(1): 17-28. (in Korean)
14
Linda, A. A. and Abrahamson, N. (2010). An improved method for nonstationary spectral matching. Earthquake Spectra 26(3): 601-617.
10.1193/1.3459159
15
Ministry of Construction & Transportation andEarthquake Engineer Society of Korea. (1997). Seismic Design Standard (II). (in Korean)
16
Ministry of Land, Transport and Maritime Affairs & Korea Infrastructure Safety Corporation. (2013). Assessment of existing facilities seismic performance. (in Korean)
17
Park, D. H., Kwak, D. Y., Jeong, C. G., and Park, T. H. (2012). Development of Probabilistic Seismic Site Coefficients of Korea. Soil Dynamics and Earthquake Engineering. 43: 247-260. (in Korean)
10.1016/j.soildyn.2012.07.018
18
Press Releases. (2017.10). https://blog.naver.com/songok4740. (in Korean)
19
Press Releases. (2018.04). http://www.dailyt.co.kr/news/articleView.html?idxno=25997. (in Korean)
20
Seed, H. B. and Idriss, I. M. (1971). Simplified procedure for evaluating soil liquefaction potential. Journal of the Soil Mechanics and Foundations Division. 97(9), 1249-1273.
21
Seed, H. B., Martin, P. P., and Lysmer, J. (1975). The generation and dissipation of pore water pressures during soil liquefaction. EERC 75-29. California.
22
Sun, C. K. (2010), Suggestion of Additional Criteria for Site Categorization in Korea by Quantifying Regional Specific Characteristics on Seismic Response. Journal of Korean Society of Earth and Exploration Geophysicists. KSEG. 13(3): 203-218. (in Korean)
23
Sun, C. K., Jeong, C. K., and Kim, D. S. (2005). A Proposition of Site Coefficients and Site Classification System for Design Ground Motions at Inland of the Korean Peninsula. Journal of Korean Geotechnical Society. KGS. 21(6): 101-115. (in Korean)
24
Yoon, J. K., Kim, D. S., and You, J. N. (2003). Evaluations of Velocity Response Spectrum of Seismic Base and Response Displacement for the seismic Design of Underground Structures. Journal of Korean Geotechnical Society. 19(4): 211-221. (in Korean)

Korean References Translated from the English

1
건설교통부&한국지진공학회 (1997). 내진설계기준 (II).
2
구태진 (2010). 다양한 지반조건을 고려한 국내 액상화 재해도 작성기법 개발. 석사학위 논문. 서경대학교. pp. 38-48.
3
곽민정, 구태진, 최재순 (2015). 빅데이터 지반정보의 불확실성을 고려한 중진지역에서의 액상화 위험도 작성기법 개발. 한국지반환경공학회 논문집. 16(1): 17-28.
4
곽창원 (2001). 국내 연안 매립지역의 액상화 재해도 작성에 관한 연구. 석사학위 논문. 연세대학교. pp. 20-81.
5
백우현 (2014). 광역지역 지반정보를 이용한 실시간 액상화 위험도 개발. 석사학위 논문. 서경대학교.
6
백우현, 최재순, 안재광 (2018). 지진시나리오 기반의 포항지역 액상화위험도 작성 연구. 한국지진공학회 논문집. 22(3): 219-224.
10.5000/EESK.2018.22.3.219
7
선창국 (2010). 지역고유 지진응답 특성 정량화를 통한 국내 부지 분류 기준의 추가 반영 제안, 한국지구물리탐사학회 논문집. KSEG. 13(3) 203-218.
8
선창국, 정충기, 김동수 (2005). 국내 내륙의 설계 기반 운동 결정을 위한 지반 증폭 계수 및 지반 분류 체계 제안. KGS. 21(6): 101-115.
9
윤종구, 김동수, 유제남 (2003). 지중구조물 내진설계를 위한 기반면의 속도 응답스펙트럼 및 응답변위 산정기법에 대한 연구. 19(4): 211-221.
10
조중연, 이중환, 박영빈, 이정배 (2015). 기존구조물의 개선된 내진성능평가기법을 기반으로 프로그램 개발을 위한 프레임 구현. 대한건축학회 추계 학술발표대회 논문집. 35: 517-518.
11
최재순, 박인준, 황경민, 장정범 (2018). 국내 동남권 지역의 전력구 지반에 대한 지진시 액상화 위험도 작성연구. 한국지반공학회. 19(10): 13-19.
12
한국전력공사 (2003). 송·변전설비 내진 설계지침서.
13
허진호, 김진호 (2011). 도시철도 시설물의 내진성능평가체계에 대한 소고. 한국철도학회 학술발표대회논문집. KSR2018F002. 2011(5): 1539-1543.
Information
  • Publisher :Korean Society of Disaster and Security
  • Publisher(Ko) :한국방재안전학회
  • Journal Title :Journal of Korean Society of Disaster and Security
  • Journal Title(Ko) :한국방재안전학회 논문집
  • Volume : 12
  • No :1
  • Pages :45-56
  • Received Date : 2019-03-04
  • Accepted Date : 2019-03-25
  • DOI :https://doi.org/10.21729/ksds.2019.12.1.45
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