Multiple choice

A double draining clay layer, 6 m thick, settles by 30 mm in three years under the influence of a certain loads. Its final consolidation settlement has been estimated to be 120 mm. If a thin layer of sand having negligible thickness is introduced at a depth of 1.5 m below the top surface, the final consolidation settlement of clay layer will be

  1. 60 mm

  2. 120 mm

  3. 240 mm

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

 Rate of settlement will not affect the final settlement and rate of settlement of clay layer will increase four times but total settlement of the clay layer will remain uneffected, hence 120mm.

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