Fig. 1. Debris flow protection system using buffer-spring
Fig. 2. An example of working load due to debris flow
Fig. 3. Buffer-wire rope
Fig. 4. 3D Modeling
Fig. 5. Load diagram due to debris flow (0.015MPa, free field 250mm)
Fig. 6. Maximum member force diagram (Applied load 0.015MPa, free field 250mm)
Fig. 7. Compare with each case
Fig. 8. Design drawing of wedge
Fig. 9. Wedge produced by milling process
Fig. 10. Combination of spring wire and wedge
Fig. 12. Compare with each case for developed debris flow system
Fig. 11. View of tensile test of new buffer-spring set
Table 1. Impact load and damage of buildings due to debris flow during landslide in Korea
Table 2. Regulation of Materials Used (Korean Industrial Standard (KS))
Table 3. Mechanical properties of steel pipe column
Table 4. Specifications of buffer-spring
Table 5. Material characteristics of anchor bolt
Table 6. Methods of safety review
Table 7. Allowable stress for main materials
Table 8. Test results of main materials
Table 9. Material properties
Table 10. Characteristics of materials in holding steel pipe
Table 11. Values of member forces (Applied load 0.015MPa, spring thread thickness 13.5mm, free field 250mm)
Table 12. Reduction rate of dynamic impact load due to buffer-spring
Table 13. Test results of main materials
Table 14. Comparison table of conventional and developed debris flow system
References
- Cho, S., Yoo, B., Kim, J. and Lee, K. 2016. Performance assessment for debris mitigation structure by using scale model tests, Journal of Korean Society Hazard Mitigation, Vol.16, No.5, pp.247-260. https://doi.org/10.9798/KOSHAM.2016.16.5.247
- Kim, K., Kim, D., Seo, J., Lee, C., Woo, C., Kang, M., Jeong, S. and Lee, D. 2018. Evaluation stability and functionality of hybrid erosion control dam for reducing debris flow damage in forested catchment nearby urban area, Journal of Korean Society of Forest Science, Vol.107, No.1, pp.59-70. https://doi.org/10.14578/JKFS.2018.107.1.59
- Kim, J., Lee, Y. and Park, K. 2010. A study on model experiment for evaluation of debris flow's impact force characteristics, Journal of Korean Geotechnical Engineering, Vol.26, No.11, pp.5-15.
- Lee, E. B., 2018. Performance Evaluation of Wedge-type Buffer Spring in Net-type Debris Flow Protection System Using Numerical Analysis, Master thesis, Kangwon National University (in Korean).
- Ro, K., Jeon, B. and Jeon, K. 2015. Induction wall influence review by debris flow's impact force, Journal of Korean Society Hazard Mitigation, Vol. 15, No.2, pp.159-164. https://doi.org/10.9798/KOSHAM.2015.15.2.159
- Wendeler, C., Volkwein, A., Roth, A., Denk, M. and Wartmann, S. 2007. Field measurements and numerical modelling of flexible debris flow barriers, Debris-Flow Hazards Mitig. Mech. Predict. Assess. Millpress, Rotterdam, pp.681-687.
- Yamamoto, A., Yamamoto, S., Toriihara, M. and Hirama, K. 1998. Impact load on Sabo dam due to debris flow, 砂防學會誌, Vol.51, No.2, pp.22-30 (in Japanese).