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NTIS 바로가기韓國地盤工學會論文集 = Journal of the Korean geotechnical society, v.29 no.1, 2013년, pp.23 - 27
The risks of debris flows caused by climate change have increased significantly around the world. Recently, landslide disaster prevention technology is more focused on the failure and post-failure dynamics to mitigate the hazards in flow-prone area. In particular, we should define the soil strength ...
핵심어 | 질문 | 논문에서 추출한 답변 |
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거석을 다량 함유한 토석류의 위험성이 큰 이유는? | 토석류는 흙, 바위, 물의 혼합체로 거석과 유목 등을 포함하는 경우가 많기 때문에 퇴적부에 있는 사회기반시설에 직간접적인 피해를 초래한다. 특히 거석(boulder)을 다량 함유한 토석류는 제어가 쉽지 않은 흐름속도 때문에 위험성이 클 수 밖에 없다. 소규모 활동을 통한 산사태는 하류로 이동하면서 계상침식을 통해 퇴적토사의 체적이 급격히 증대된다(Hungr, 2005). | |
토석류는 무엇인가? | 토석류(debris flow)는 지질재해의 한 종류로 도심지와 산악지 등에서 발생하고 있으며 적지 않은 인명과 재산 피해를 동반한다. 토석류는 산사태의 한 종류로 슬라이딩(활동)으로 생긴 토사와 계곡부 바닥에 쌓여있던 흙과 암석이 물과 함께 빠른 속도(최대 20~30m/sec)로 흘러내려가는 현상을 말한다(Hungr, 2009; Hungr et al., 2001, 2012). | |
국내에서 사면의 붕괴 시 활동의 시작부 경사도는? | 사면의 붕괴는 원호형 사면붕괴(rotational slope failure) 형태와 퇴행성 사면붕괴(retrogressive slope failure) 거동을 동시에 보이는 경우가 많다. 국내의 경우, 활동의 시작부는 30° 이상의 가파른 경사를 보인다. 토석류는 흙, 바위, 물의 혼합체로 거석과 유목 등을 포함하는 경우가 많기 때문에 퇴적부에 있는 사회기반시설에 직간접적인 피해를 초래한다. |
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