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Part 3

Part 3. Behavior of Overconsolidated Clay. Normal versus Overconsolidated clay behavior. Clay retains a “memory” of its load history The effective cohesion of overconsolidated clay can be significant

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Part 3

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  1. Part 3 Behavior of Overconsolidated Clay

  2. Normal versus Overconsolidated clay behavior • Clay retains a “memory” of its load history • The effective cohesion of overconsolidated clay can be significant • The effective cohesion can be lost through subsequent wetting, especially, load cycling with moisture

  3. Mohr Circle plot of a typical overconsolidated clay soil, illustrating the artificially high cohesion engendered by tortuous desiccation. Note the apparent preconsolidation pressure caused by the severe shrinkage.

  4. The fundamental problem with slabs-on-grade on expansive soils is differential swell beneath the corners, sides, and under the center of a uniformly-loaded slab, as sketched here.

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