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Example 6.4 · Square footing, water table

Example 6.4 of Das & Sivakugan (2017), Principles of Foundation Engineering, solved in Rischio: allowable load, FS 3, beside the source's answers.

Source: Das, B. M., & Sivakugan, N. (2017). Principles of Foundation Engineering, SI edition, 9th ed. Cengage Learning. Example 6.4.
ID: das-pfe9-6-4

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The model as the editor draws it, with what governs its result.

Source vs Rischio

	Source	Rischio	Difference
Allowable load, FS 3	667.2 kN	666.9 kN	0.0 %

The book solves for the width that carries 667.2 kN; Rischio checks a given width, so it takes the book's answer, 1.36 m, and gets the load back.

What the engine checks in this model, against Rischio's default limits.

Bearing capacityPasses	$\mathrm{FS} = 21.31$	$\ge 3.0$	Passes
Eccentricity along the widthPasses	$e_B = 0.00\,\mathrm{m}$	$\le 0.227\,\mathrm{m}$	Passes
Eccentricity along the lengthPasses	$e_L = 0.00\,\mathrm{m}$	$\le 0.227\,\mathrm{m}$	Passes

The example's data, element by element, as the model holds it.

FootingFooting · Rectangular

LoadLoad · on the footing

SandStratum

Water tableWater table · depth below ground