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Unformatted text preview: immediately). (a) (b) Figure Q4.6: distributions of (a) pore water pressure and (b) excess pore water pressure (with hydrostatic or steady state component subtracted) with depth (d) Consider an element of soil of thickness z at a depth z below the excavated surface. The compression of this element is , given by = ( ' v /E' ). z as by definition E' 0 = ' v / v and v = / z Now, E' 0 = (5000 + 4000z) kPa and the eventual increase in vertical effective stress ' v at depth z is equal to the reduction in pore water pressure at the same depth, ' v = 10z (ignoring friction on the sheet piles). Hence the total settlement is given by...
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 Fall '11
 StuartChalk
 Analytical Chemistry

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