1.0 과업의 배경 및 목적...3 1.1 과업의 목적...3 1.2 과업의 범위...3 1.3 과업의 내용...4 2.0 유역의 현황조사...8 2.1 유역의 개황...8 2.1.1 청계천...8 2.1.2 욱천...9 2.1.4 대방천...10 2.2 유역의 일반사항...20 2.2.1 행정구역 및 인문사항...20 2.2.2 토지이용현황...23 2.2.3 임상...24 2.2.4 지질...24 2.3 기상현황...36 2.4 유역의 지형적 특성...38 2.4.1 유역면적 및 유로연장...38 2.4.2 하상경사...38 2.5 풍수해 피해 상황...40 3.0 관련계획조사...44 3.1 욱천 복개 보수 및 실시설계...44 3.2 복개(청계천, 욱천)안전관리시스템 설계에 관한 연구...45 3.3 청계천 복개구조물 안전진단 및 보수공법...46 3.4 청계천 고가도로 안전진단 및 기본계획...48 3.5 서울시 관내 하천제방 안전도 검토 및 치수종합대책 수립...50 4.0 조사내용...54 4.1 조사측량...54 4.1.1 종단측량...54 4.1.2 횡단측량...55 4.1.3 표석매설...55 4.2 토질조사...57 4.2.1 조사목적...57 4.2.2 조사내용...57 4.2.3 조사기간...58 4.2.4 조사결과...61 4.3 구조물 현황 및 이력조사...97 4.3.1 청계천...97 4.3.2 욱천...101 4.3.3 반포천...101 4.3.3 대방천 4.4 수질 및 유해가스 조사...103 4.4.1 측정내용...103 4.4.2 조사기간...104 4.5 콘크리트 강도 조사...113 4.5.1 측정지점 선정...113 4.5.2 측정방법...113 4.5.3 콘크리트 압축강도 측정...115 5.0 하도정비 기본계획수립...123 5.1 수문분석..123 5.1.1 수문관측소 현황...123 5.1.2 확률강우량...124 5.1.3 유효강우량 산정...124 5.1.4 홍수량 산정...133 5.2 홍수위...156 5.2.1 기점홍수위...156 5.2.2 조도계수...156 5.2.3 홍수위 산정...158 5.3 하천시설 능력검토...171 5.3.1 청계천...171 5.3.2 욱천...172 5.3.3 반포천...173 5.3.4 대방천...173 6.0 안전진단 및 분석...177 6.1 외관조사에 의한 구조물 평가...177 6.1.1 조사대상 구간...177 6.1.2 조사방법...178 6.1.3 조사방법...178 6.1.4 현황 평가 기준...179 6.1.5 복개구조물 현황도 작성 방법...186 6.1.6 외관조사...187 6.2 내하력 시험에 의한 구조물 평가...324 6.3 구조해석에 의한 구조물 평가...377 7.0 구조물 노후화 원인 분석...391 7.1 구조물 노후화 일반사항...391 7.2 각 구조체 부재별 손상원인분석...393 7.2.1 청계천...393 7.2.2 욱천...394 7.2.3 반포천...395 7.2.4 대방천...396 7.2.5 결론...397 7.3 수질 및 유해가스에 의한 원인 분석...398 7.3.1 측정결과...398 7.3.2 항목별 수질분석결과...402 7.3.3 분석결과...404 7.3.4. 결론...406 7.3.5 발생가스에 의한 폭발위험분석...407 8.0 유지관리대책 및 개선방안...413 8.1 복개구조물의 안정성에 관련된 일반문제점...413 8.2 개선방안...414 8.3 유지관리대책...422 9.0 기시공 보수·보강의 효과 분석...427 9.1 보수·보강 현황...427 9.2 기시공된 보수·보강 효과 검토...430 9.2.1 FRP 보수공법...430 9.2.2 모르터 공법의 효과 분석...437 9.3 결론...438 9.4 건의사항...439 10.0 기본설계...443 10.1 보수·보강 계획...443 10.1.1 기본개념...443 10.1.2 공법개요...444 10.1.3 보수·보강 공법의 선정...450 10.1.4 보수·보강 계획...464 10.2 하도정비 기본설계...496 10.2 1 청계천...496 10.2.2 욱천...507 10.2.3 반포천...517 10.2.4 대방천...525 10.3 공사비...529 ◎ 별첨 1. 토질조사 2. 기본설계도면 2.1 보수·보강 계획 2.2 하도정비 기본설계