1. 서론...16 1.1 연구목적...16 1.2 조사범위...16 1.3 조사대상...17 1.4 연구내용...22 1.5 연구수행방법...23 2. 일반현황...26 2.1 기후, 지형 및 지하수 현황...26 2.2 일반지질...29 2.3 절리의 발달...31 2.4 풍화의 발달...34 2.5 암석과 절리의 공학적 성질...36 3. 암반사면의 안정성 분석...39 3.1 일반적인 파괴형태...39 3.2 현장조사방법 및 암반사면안정성 해석법...43 3.3 암괴의 안정성 분석...52 3.3.1 능선바위(1)...56 3.3.2 능선바위(2)...59 3.3.3. 잔바위...68 3.3.4 폭포바위...72 3.3.5 거북바위...76 3.3.6 곰바위...81 3.3.7 병풍바위(Ⅰ)...85 3.3.8 병풍바위(Ⅱ)...94 3.3.9 감자바위(1)...98 3.3.10 감자바위(2)...105 3.3.11 쌍둥이바위...109 3.3.12 개구리바위...113 3.3.13 자라바위...117 3.3.14 칼바위...121 3.3.15 외토리바위...127 3.3.16 송이바위...132 3.3.17 장군바위...135 4. 굴착에 의한 영향...139 5. 토질사면의 안정성 분석...143 5.1 전반적인 토질사면의 안정분석...143 5.2 불안정 토질사면의 안전율계산...148 6. 사면에 대한 종합대책...156 6.1 위험암반에 대한 대책...156 6.2 토질사면에 대한 대책...168 7. 터널안정분석 및 보강대책...171 7.1 지반현황...171 7.2 기존 설계도서 및 시공현황...176 7.3 사고원인 분석...178 8. 측점 No.49 부근 암반 절취면에 대한 분석 및 대책...181 8.1 지반현황...181 8.2 파괴형태 및 안정분석...186 8.3 대책...188 9. 결론...191 ※참고문헌...193 ※부록...203 1. 평사투영법을 이용한 안정해석방법...203 2. 한계평형해석법을 이용한 안정성분석...219 3. 외토리바위 지지암반에 대한 안전율 해석 결과...247 4. 수로 1 상부 불안정 토질사면의 안전율 해석 결과...251 5. 사진...267