포항지진 발생 주변지역 지질특성에 따른 저수지 취약성 해석

서지정보

ㆍ발행기관 : 한국지진공학회 ㆍ수록지정보 : Jorunal of the Earthquake Engineering Society of Korea / 22권 / 3호
ㆍ저자명 : 임성근, 송성호, 유재형

목차

A B S T R A C T
1. 서 론
2. 연구지역 현황
2.1 지질학적 특징
2.2 주변 저수지 현황 및 피해 사례
3. 지질재해 취약성 평가요소
3.1 저수지 지질재해 취약성 평가 방법
3.2 저수지 내진성능 평가
3.3 저수지 정밀안전진단 평가
3.4 저수지 지진영향 평가
3.5 저수지 주변 지질구조선 평가
3.6 저수지별 지질재해 종합취약성 평가지수
4. 결과 및 고찰
4.1 저수지 주변 지질구조 특성
4.2 저수지 기초지반 특성
5. 결 론
REFERENCES

영어 초록

A total of 594 reservoirs (17%), which are managed by KRC, equipped with earthquake-resistant facilities whereas remaining ones did not. In addition, reservoirs were placed without the effect of geological structures (i.e., fault and lineament). Therefore, development on technique for alleviating the potential hazards by natural disasters along faults and lineaments has required. In addition, an effective reinforcement guideline related to the geological vulnerabilities around reservoirs has required. The final goal of this study is to suggest the effective maintenance for the safety of earth fill dams. A radius 2 km, based on the center of the reservoir in the study area was set as the range of vulnerability impacts of each reservoir. Seismic design, precise safety diagnosis, seismic influence and geological structure were analyzed for the influence range of each reservoir. To classify the vulnerability of geological disasters according to the fault distribution around the reservoir, evaluation index of seismic performance, precise safety diagnosis, seismic influence and geological structure were also developed for each reservoir, which were a component of the vulnerability assessment of geological disasters. As a result, the reservoir with the highest vulnerability to geological disasters in the pilot district was analyzed as Kidong reservoir with an evaluation index of 0.364. Within the radius of 100km from the epicenter of the Pohang earthquake, the number of agricultural infrastructure facilities subject to urgent inspections were 1,180 including reservoirs, pumping stations and intakes. Four reservoirs were directly damaged by earthquake among 724 agricultural reservoirs. As a result of the precise inspection and electrical resistivity survey of the reservoir after the earthquake, it was reported that cracks on the crest of reservoirs were not a cause of concern. However, we are constantly monitoring the safety of agricultural facilities by Pohang aftershocks.

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