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Cyclic mobility differs from flow liquefaction in that cyclic mobility involves

  • A.limited strain that accumulates cycle by cycle
  • B.the complete and sudden loss of strength followed by a flow slide of the whole mass
  • C.no accumulation of pore pressure at all during the course of the shaking
  • D.an increase in the shear strength of the deposit as the shaking continues

Answer: A

Denser soils dilate as they shear and regain strength, so deformation builds up in steps rather than running away. Flow liquefaction needs a loose soil in which the static shear stress alone exceeds the residual strength that remains.

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