GATE Civil Engineering
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Surcharge loading required to be placed on the horizontal backfill of a smooth retaining vertical wall so as to completely eliminate tensile crack is:

  1. $2 \: c$
  2. $2 \: c \: k_a$
  3. $2 c \sqrt{k_a}$
  4. $2 c/ \sqrt{k_a}$
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