한국지반공학회:학술대회논문집 (Proceedings of the Korean Geotechical Society Conference)
- 한국지반공학회 2008년도 추계 학술발표회
- /
- Pages.893-903
- /
- 2008
강우 시 사면 붕괴 위험도 평가에 관한 제안
A Proposal for Risk Evaluation Method of Slope Failure due to Rainfalls
- Chae, Jong-Gil (Research Center for Urban Safety and Security, Kobe University) ;
-
Jung, Min-Su
(Dept. of Civil Engineering, Kobe University) ;
- Tori, Nobuyaki (Dept. of Civil Engineering, Kobe University) ;
- Okimura, Takashi (Construction Engineering Research Institute Foundation)
- 발행 : 2008.10.10
초록
A method for predicting surface failures which occur during heavy rainfall on mountain slopes is proposed by using the digital land form model that is obtained by reading altitude on a topographical map at 10m grid point space. A depth of a potential failure layer is assumed at each grid point. In the layer, an infiltrated water movement from cell to cell is modeled in the study (cell is a square of the grid). Infiltrated ground water levels which show the three dimensional effects of a topographical factor in an area can be hourly calculated at every cell by the model. The safety factor of every cell is also calculated every hour by the infinite slope stability analysis method with the obtained infiltrated ground water level. Failure potential delineation is defined here as the time when the safety factor becomes less than unity under the assumptions that effective rainfall is 20mm/h and continues 20 hours.