Smith's Elements of Soil Mechanics. Ian Smith

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C (3 m thick). Permeability tests gave the following values:

       Soil A 3 × 10−1 mm/s

       Soil B 2 × 10−1 mm/s

       Soil C 1 × 10−1 mm/s

       Determine the ratio of the average permeabilities in the horizontal and vertical directions.

      Answer 1.22

      Beneath the deposit there is a gravel layer subjected to artesian pressure, the surface of the deposit coinciding with the groundwater level. Standpipes show that the fall in head across soil A is 150 mm. Determine the value of the water pressure in the gravel.

      Answer 80 kPa

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