198_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011

198_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011 -...

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Unformatted text preview: SL24 o Sketch equipotential line through midpoint of base of slice (point B) o Assume datum at base midpoint and calculate total head at point A, then pressure head at point B ht=hp+h a where: h, hp ... -('''' ,, , h, H = total head = pressure head = elevation head (with respect to datum) ,, \ ~ I B ... - - _ ...... r I I ,, at point A: h, hp ---I _ ...1 ... ... ... h, at point B: ,\..-~e---4 6.L; h, h, hp = H (equipotential) =0 =H-O=H 'Water Pressure by Pore Pressure Rraa~liiico~,'i'r";-a-= (use for stability charts and computer programs) o . . define pore pressure ratio, ru = Pore Water Pressure Total Overburden Pressure o Usually need an approximate overall average ru, can then investigate sensitivity of FS to ru o 1m H "{sal o Can find ru for slices and then calculate an average r:- =..!. "\1 nL..1 -((;.5 f Q ,;d i,.do.~ J,h)eJ 0., ... I''\? ..... s o Can find the total area of slip circle and area of slip circle under water, ., Ysal =Ym. then r =~~~ ywAw I u 'YSatAT ...
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This note was uploaded on 02/10/2012 for the course CEG 4012 taught by Professor Staff during the Fall '08 term at University of Florida.

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