상재하중 위치에 따른 보강토 옹벽의 설계

국문 초록 (Abstract)

최근들어 사면보강 및 부지조성을 위한 옹벽구조물 중 보강토 옹벽이 많이 적용되고 있다. 하지만 보강토 옹벽의 붕괴사례가 빈번히 일어나고 있다. 보강토체의 규모와 그리드 길이 및 종류는 대부분 합리적으로 결정되고 있다. 하지만 설계시 상재하중의 반영은 일반적인 차량하중 또는 최소적재하중을 적용하는 반면 시공시 보강토 옹벽 상부에 건물의 시공 및 과다한 화물의 적재에 의하여 붕괴가 발생하고 있다. 또한, 배면토 상부에 작용하는 상재하중은 설계에 반영되지 않으므로 배면토압이 설계시보다 크게 작용하여 붕괴를 유발하기도 한다. 이와 같이 전체 구조물의 안정성에 가장 중요한 작용요소는 상재하중의 크기 및 이격거리이다. 그러므로 이 연구에서는 보강토체 내 파괴면을 중심으로 상재하중의 위치와 크기를 변화시켜 보강토 옹벽의 거동을 분석하고 그 결과를 통하여 설계시 상재하중 적정 위치를 분석하고자 한다.

목차 (Table of Contents)

• 국문초록 ·········································································································· ⅰ
• ABSTRACT ···································································································· ⅲ
• 표 목차 ·············································································································· ⅴ
• 그림 목차 ········································································································· ⅵ
• 1. 서 론 ··········································································································· 1
• 1.1. 연구 배경 및 목적 ········································································· 1
• 1.2. 연구의 내용 및 방법 ···································································· 2
• 1.3. 기존의 연구 ······················································································· 3
• 2. 보강토 옹벽의 설계이론 ································································ 5
• 2.1. 보강토 옹벽의 정의 ········································································· 5
• 2.1.1. 보강토 공법의 기본개념 ····························································· 5
• 2.1.2. 보강토 옹벽의 원리 ······································································ 7
• 2.2. 보강토 옹벽의 설계방법 ································································ 9
• 2.2.1. 보강토 옹벽의 설계 ······································································ 9
• 2.2.2. 안정해석 방법 ·············································································· 22
• 2.3. 보강토 옹벽의 붕괴사례 ······························································ 33
• 2.3.1. 보강토 옹벽 붕괴유형 ······························································· 33
• 3.보강토 옹벽 상재하중의 영향성 분석 ···························· 41
• 3.1. 보강토옹벽 설계사례 분석 ························································· 41
• 3.1.1. 해석단면 및 조건 ········································································ 41
• 3.1.2. 지반조건 ························································································· 42
• 3.1.3 해석단면 결과 ················································································ 42
• 3.2. 상재하중 계획 및 해석 ································································ 44
• 3.2.1. 이격거리에 따른 전체활동에 대한 해석결과 ···················· 45
• 3.2.2. 이격거리에 따른 외ㆍ내적안정해석 결과 ·························· 66
• 3.3. 이격거리에 따른 영향성 분석 ················································· 68
• 3.3.1. 이격거리에 따른 전체활동에 대한 해석결과 분석 ········· 68
• 3.3.2. 이격거리에 대한 외ㆍ내적안정해석 결과분석 ················· 74
• 4. 결론 ·············································································································· 81
• 참고문헌 ·········································································································· 82