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Understanding Slope Safety and Its Impact on Us

Explore dangerous slopes near school, landslides causes and effects, preventive measures, and maintenance techniques. Fieldwork, maps, videos, and web resources used for teaching.

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Understanding Slope Safety and Its Impact on Us

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Presentation Transcript

  1. Slope Safety and Us To stress the importance of the close relationship between earth science and man

  2. Focus of study: • Where are the dangerous slopes of our school? • When did landslide occur? • Why did slopes collapse? • How did landslide affect us? • What are the measures taken to prevent landslides?

  3. Ways of teaching: • Site visit • Map work and worksheet • Searching info on the internet • Weather map interpretation • Video show

  4. Where are the dangerous slopes of our school? • Background information: • Our school site • http://my.wyk.edu.hk/ • Field work • A map for locating the dangerous slope

  5. When did landslide occur? May 2 1989

  6. What are the causes of landslide? • Video show: Landslides in HK by Civil Engineering Dept • Weather Map

  7. How did landslide affect us? • Safety of students • Safety of school buildings • Traffic • Bus stop and sidewalk

  8. Man’s response to landslides: Short-term measures Long-term maintenance

  9. Short-term response Clearance of mud Plastic cover and temporary barrier Removal of bus stop

  10. Long-term measures Slope stabilization project When? Duration? How? Methods? Why are these methods adopted? How much? How did the slope repair work affect WYK boys?

  11. 1998

  12. shotcrete, stone pitching, drainage pipes

  13. grassing, soil nail, net

  14. retaining wall

  15. open drainage

  16. Limitations? Co-ordination among ED, CED and Building Dept Ownership – school vs. crown land Environmental protection vs economic consideration -costly retaining wall -much of the trees were removed

  17. How can you find out the dangerous slopes near your school? http://hkss.ced.gov.hk/hkss/eng/index.htm

  18. The End

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