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NTIS 바로가기대한토목학회논문집 = Journal of the Korean Society of Civil Engineers, v.34 no.4, 2014년, pp.1227 - 1240
Abandoned mines often cause environmental problems, such as alteration of landscape, metal contamination, and landslides due to a heavy rainfall. Geotechnical and rheological tests were performed on waste materials corrected from Imgi waste rock dump, located in Busan Metropolitan City. Debris flow ...
핵심어 | 질문 | 논문에서 추출한 답변 |
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토석류 예측방법은 지금껏 어떤 방법에 의존해 왔는가? | 지난 20년간 토석류를 사전예측하고 피해를 최소화하기 위한 많은 연구가 있었다(Hunger, 1995; Scotto di Santolo and Evangelista, 2009). 토석류 예측방법은 오랜 시간 토석류 체적-이동거리-사면경사들 간 상호관계에 따른 경험적 방법에 의존하여 왔다(예를 들어, Fahrboschung 해석, Locat and Lee, 2002). 토석류는 토질역학·지반공학 이론으로는 제한된 해석만이 가능하였기에 유체역학에 기초한 수리학적 모델을 개발하고 이를 통한 역해석을 수행하거나 지질공학 이론을 통한 실제 토석류 발생지역의 지형학적 특성만을 고려한 흐름해석을 수행하여 왔다. | |
토석류 거종을 표현하기 위한 부정류-부등류(unsteadynon uniform flow) 수학적 모델을 사용할 때 반드시 필요한 것은? | 이들 모델들은 평균심도를 고려한 수리학적 모델들로 생브낭 방정식(Saint-Venant equation)과 유사하다(Jiang and LeBlonde, 1992, 1993). 이러한 수학적 모델을 사용하여 토석류 해석을 수행하기 위해 반드시 유체거동 입력변수가 필요하다. 하지만 수치해석에 요구되는 입력 변수들은 토석류를 뉴턴유체, 완전소성유체 및 입상체들로 가정하고 과거 발생이력을 가진 토석류에 맞도록 임의적으로 선택하여 사용되고 있다. | |
현재까지 가장 널리 사용되는 유변물성시험장치는? | 유변학적 매개변수를 결정하기 위해 지구환경분야에서 다양한 점도계(viscometer)와 레오미터(rheometer)가 개발되었다. 현재까지 가장 널리 사용되는 유변물성시험장치는 플레이트-플레이트(plate-plate), 콘-플레이트(cone-plate), 동축 실린더(coaxial cylinder) 타입 등이다. 하지만 이들 시험장치들은 점토 혹은 점토보다 작은 균질한 입자크기를 가진 재료에 적합한 시험기로 토석류처럼 입자크기가 크고 다양한 경우에 부적합하다. |
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