Sliding Stability: Difference between revisions
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[[Category:Global Stability of a Dam]] | |||
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"[[Stability]] must be assessed on selected surfaces within the structure... Sliding safety must also be assessed at/or near the foundation-structure interface. This surface may be either level or sloping. Generally, it may by assumed that a surface that slopes upward (in the direction of possible sliding) will have a beneficial effect, while one that slopes downward will increase the possibility for sliding... Where a shallow weak seam exists below a structure's contact with the foundation, or a structure is imbedded below the top of the foundation, two possible failure modes are present. One mode involves slippage along the weak plane directly under the structure plus slippage along a plane through the foundation above the weak seam (crossbed shear for rock or passive resistance for soil). When the weak seam extends a large distance past the toe of the structure without daylighting, the second mode will usually be critical."<ref name="EM 1110-2-2100">[[Stability Analysis of Concrete Structures (EM 1110-2-2100) | Stability Analysis of Concrete Structures (EM 1110-2-2100), USACE, 2005]]</ref> | |||
==Examples== | ==Examples== | ||
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==Best Practices Resources== | ==Best Practices Resources== | ||
{{Document Icon}} [[Stability Analysis of Concrete Structures (EM 1110-2-2100)|Stability Analysis of Concrete Structures (EM 1110-2-2100) ( | {{Document Icon}} [[Stability Analysis of Concrete Structures (EM 1110-2-2100) | Stability Analysis of Concrete Structures (EM 1110-2-2100), USACE]] | ||
{{Document Icon}} [[Sliding Stability for Concrete Structures (ETL 1110-2-256)|Sliding Stability for Concrete Structures (ETL 1110-2-256) | {{Document Icon}} [[Gravity Dam Design (EM 1110-2-2200) | Gravity Dam Design (EM 1110-2-2200), USACE]] | ||
{{Document Icon}} [[Design of Small Dams | Design of Small Dams, USBR]] | |||
{{Document Icon}} [[Sliding Stability for Concrete Structures (ETL 1110-2-256) | Sliding Stability for Concrete Structures (ETL 1110-2-256), USACE]] | |||
==Trainings== | |||
{{Video Icon}} [[On-Demand Webinar: Stability Evaluations of Concrete Dams]] | |||
{{Video Icon}} [[On-Demand Webinar: Introduction to Concrete Gravity Dams]] | |||
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Latest revision as of 20:48, 11 July 2023
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| Learn from the failure of Bayless Dam due to instability at DamFailures.org |
"Stability must be assessed on selected surfaces within the structure... Sliding safety must also be assessed at/or near the foundation-structure interface. This surface may be either level or sloping. Generally, it may by assumed that a surface that slopes upward (in the direction of possible sliding) will have a beneficial effect, while one that slopes downward will increase the possibility for sliding... Where a shallow weak seam exists below a structure's contact with the foundation, or a structure is imbedded below the top of the foundation, two possible failure modes are present. One mode involves slippage along the weak plane directly under the structure plus slippage along a plane through the foundation above the weak seam (crossbed shear for rock or passive resistance for soil). When the weak seam extends a large distance past the toe of the structure without daylighting, the second mode will usually be critical."[1]
Examples
Learn from the failure of Bayless Dam due to instability (DamFailures.org)
Best Practices Resources
Stability Analysis of Concrete Structures (EM 1110-2-2100), USACE
Gravity Dam Design (EM 1110-2-2200), USACE
Sliding Stability for Concrete Structures (ETL 1110-2-256), USACE
Trainings
On-Demand Webinar: Stability Evaluations of Concrete Dams
On-Demand Webinar: Introduction to Concrete Gravity Dams
Citations:
Revision ID: 7169
Revision Date: 07/11/2023