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GEOL 2207 (204)
B.Ward (130)
Lecture

Factor of Safety.docx

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Department
Geology
Course
GEOL 2207
Professor
B.Ward
Semester
Summer

Description
Factor of Safety (SF) – Relationship of shear strength against driving force(shear stress) Ratio of resisting forces to driving forces  Stable when >1; unstable <1 Cohesion – Capacity of particles to stick together  Pure sand, no cohesion  Sand, silt  cohesion, will help keep it together Slope – has a very strong influence since as the angle gets bigger, the cosine gets smaller, and the sine gets bigger Internal Angle of Friction – the angle of shearing resistance controlled by the frictional forces between individual particles, especially important with interfaces between different material types  Mo
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