# Verified examples Worked examples from published sources, solved in Rischio: the source's answers beside the engine's, and where they differ, why. Each one is a worked example from a published source, built as a Rischio model with its data and solved by the same engine as the studio. Each has its own page, where you can open it in the studio. The same examples are tests in the engine’s code. - [ Retaining walls `das-pfe9-17-1` Example 17.1 · Cantilever wall Das & Sivakugan (2017), Principles of Foundation Engineering, SI edition, 9th ed. Overturning 2.98 · 2.98 Sliding 2.73 · 2.73 Bearing capacity 3.0 · 2.93 ](https://rischio.io/docs/examples/das-pfe9-17-1/) - [ Retaining walls `das-pfe9-17-3` Example 17.3 · Gravity wall Das & Sivakugan (2017), Principles of Foundation Engineering, SI edition, 9th ed. Overturning 3.04 · 3.04 Sliding 3.05 · 3.04 Maximum contact pressure 174.24 · 174.13 kPa Minimum contact pressure 42.86 · 42.89 kPa ](https://rischio.io/docs/examples/das-pfe9-17-3/) - [ Footings `das-pfe9-6-3` Example 6.3 · Strip footing Das & Sivakugan (2017), Principles of Foundation Engineering, SI edition, 9th ed. Allowable load per metre, FS 3 621 · 622 kN/m ](https://rischio.io/docs/examples/das-pfe9-6-3/) - [ Footings `das-pfe9-6-4` Example 6.4 · Square footing, water table Das & Sivakugan (2017), Principles of Foundation Engineering, SI edition, 9th ed. Allowable load, FS 3 667.2 · 666.9 kN ](https://rischio.io/docs/examples/das-pfe9-6-4/) - [ Footings `das-pfe9-6-7` Example 6.7 · Eccentric strip footing Das & Sivakugan (2017), Principles of Foundation Engineering, SI edition, 9th ed. Ultimate load per metre 5 260 · 5 261 kN/m ](https://rischio.io/docs/examples/das-pfe9-6-7/) - [ Footings `das-pfe9-9-2` Example 9.2 · Elastic settlement Das & Sivakugan (2017), Principles of Foundation Engineering, SI edition, 9th ed. Settlement at the centre 12.4 · 12.6 mm ](https://rischio.io/docs/examples/das-pfe9-9-2/) - [ Piles `das-pfe9-12-1` Example 12.1 · Driven pile in sand Das & Sivakugan (2017), Principles of Foundation Engineering, SI edition, 9th ed. Toe capacity 829 · 829 kN ](https://rischio.io/docs/examples/das-pfe9-12-1/) - [ Piles `das-pfe9-12-2` Example 12.2 · Driven pile in clay Das & Sivakugan (2017), Principles of Foundation Engineering, SI edition, 9th ed. Toe capacity 132.9 · 132.9 kN ](https://rischio.io/docs/examples/das-pfe9-12-2/) - [ Piles `das-pfe9-12-7` Example 12.7 · α method, layered clay Das & Sivakugan (2017), Principles of Foundation Engineering, SI edition, 9th ed. Shaft capacity 1 050 · 1 050 kN ](https://rischio.io/docs/examples/das-pfe9-12-7/) - [ Piles `das-pfe9-12-22` Example 12.22 · 3 × 4 group in clay Das & Sivakugan (2017), Principles of Foundation Engineering, SI edition, 9th ed. Group capacity 14 297 · 14 297 kN ](https://rischio.io/docs/examples/das-pfe9-12-22/) | Example | Reference | Compared | Source | Rischio | Difference | | --- | --- | --- | --- | --- | --- | | [Example 17.1 · Cantilever wall](https://rischio.io/docs/examples/das-pfe9-17-1/)`das-pfe9-17-1` | Das & Sivakugan (2017), Principles of Foundation Engineering | Overturning | 2.98 | 2.98 | 0.0 % | | Sliding | 2.73 | 2.73 | −0.1 % | | Bearing capacity | 3.0 | 2.93 | −2.3 % | | [Example 17.3 · Gravity wall](https://rischio.io/docs/examples/das-pfe9-17-3/)`das-pfe9-17-3` | Das & Sivakugan (2017), Principles of Foundation Engineering | Overturning | 3.04 | 3.04 | 0.0 % | | Sliding | 3.05 | 3.04 | −0.2 % | | Maximum contact pressure | 174.24 kPa | 174.13 kPa | −0.1 % | | Minimum contact pressure | 42.86 kPa | 42.89 kPa | +0.1 % | | [Example 6.3 · Strip footing](https://rischio.io/docs/examples/das-pfe9-6-3/)`das-pfe9-6-3` | Das & Sivakugan (2017), Principles of Foundation Engineering | Allowable load per metre, FS 3 | 621 kN/m | 622 kN/m | +0.1 % | | [Example 6.4 · Square footing, water table](https://rischio.io/docs/examples/das-pfe9-6-4/)`das-pfe9-6-4` | Das & Sivakugan (2017), Principles of Foundation Engineering | Allowable load, FS 3 | 667.2 kN | 666.9 kN | 0.0 % | | [Example 6.7 · Eccentric strip footing](https://rischio.io/docs/examples/das-pfe9-6-7/)`das-pfe9-6-7` | Das & Sivakugan (2017), Principles of Foundation Engineering | Ultimate load per metre | 5 260 kN/m | 5 261 kN/m | 0.0 % | | [Example 9.2 · Elastic settlement](https://rischio.io/docs/examples/das-pfe9-9-2/)`das-pfe9-9-2` | Das & Sivakugan (2017), Principles of Foundation Engineering | Settlement at the centre | 12.4 mm | 12.6 mm | +1.6 % | | [Example 12.1 · Driven pile in sand](https://rischio.io/docs/examples/das-pfe9-12-1/)`das-pfe9-12-1` | Das & Sivakugan (2017), Principles of Foundation Engineering | Toe capacity | 829 kN | 829 kN | 0.0 % | | [Example 12.2 · Driven pile in clay](https://rischio.io/docs/examples/das-pfe9-12-2/)`das-pfe9-12-2` | Das & Sivakugan (2017), Principles of Foundation Engineering | Toe capacity | 132.9 kN | 132.9 kN | 0.0 % | | [Example 12.7 · α method, layered clay](https://rischio.io/docs/examples/das-pfe9-12-7/)`das-pfe9-12-7` | Das & Sivakugan (2017), Principles of Foundation Engineering | Shaft capacity | 1 050 kN | 1 050 kN | 0.0 % | | [Example 12.22 · 3 × 4 group in clay](https://rischio.io/docs/examples/das-pfe9-12-22/)`das-pfe9-12-22` | Das & Sivakugan (2017), Principles of Foundation Engineering | Group capacity | 14 297 kN | 14 297 kN | 0.0 % | On each row: the source · Rischio ## About these examples Each example cites its source as you’d cite it in a paper (authors or organization, year, title, edition or report number, and the example’s number) so you can check it in your own copy. Each page links to the source: a book to where you can buy it, a report or manual from a public agency to its official PDF. We publish the source’s final answers beside Rischio’s, with the difference, a drawing of our model and, where the two differ, a note in our own words. The problem’s data stays inside the model you open in the studio. We don’t reproduce the source’s text, figures or solution steps, and we use worked examples only, never end-of-chapter problems. No link earns us a commission. Rischio isn’t affiliated with the authors or publishers of these sources. If you hold the rights to one and want an example removed, write to [hello@rischio.io](mailto:hello@rischio.io). --- Source: https://rischio.io/docs/examples/