Slope Stability - Revision history

Grichards@gfnet.com at 19:49, 27 August 2024

2024-08-27T19:49:58Z

← Older revision		Revision as of 19:49, 27 August 2024
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	#"slickensides;		#"slickensides;
	#"field evidence relating to slides, earthquake activity, movement along existing faults, and tension jointing”.<ref name="Slope Stability"/></br></br>		#"field evidence relating to slides, earthquake activity, movement along existing faults, and tension jointing”.<ref name="Slope Stability"/></br></br>

			==Other Guidance==
			A critical aspect of any [[engineering]] analysis is communication. There are a variety of slope stability modeling approaches and methodologies, and it is important to owners, consultants, and regulators that clear communication is integrated in the process. General guidance and recommendations regarding both pre- and post-modeling communication are provided on this page: [[Modeling Communication]]. Items specific to slope stability analysis that should be considered in advance of any modeling effort are summarized here: [[Pre-Modeling Communication: Slope Stability Model Considerations]].

	==Examples==		==Examples==

DamPros@damtoolbox.org at 05:31, 7 September 2023

2023-09-07T05:31:01Z

← Older revision		Revision as of 05:31, 7 September 2023
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	“Evaluation of slope stability requires establishing the conditions, called ‘design conditions’ or ‘[[Loading Conditions\|loading conditions]],’ to which the slope may be subjected during its life, and performing analyses of stability for each of these conditions. There are four design conditions that must be considered for dams:		“Evaluation of slope stability requires establishing the conditions, called ‘design conditions’ or ‘[[Loading Conditions\|loading conditions]],’ to which the slope may be subjected during its life, and performing analyses of stability for each of these conditions. There are four design conditions that must be considered for dams:
	#[[Stability During and at the End of Construction\|During and at the end of construction]],		#[[Stability During and at the End of Construction\|During and at the end of construction]],
	#[[Stability During Steady State Seepage Conditions\|Steady state seepage]],		#[[Stability During Steady State Seepage Conditions\|Steady state seepage]] (both normal and [[Flood Conditions\|flood conditions]]),
	#[[Stability During Sudden Drawdown\|Sudden drawdown]], and		#[[Stability During Sudden Drawdown\|Sudden drawdown]], and
	#[[Stability During an Earthquake\|Earthquake loading]].		#[[Stability During an Earthquake\|Earthquake loading]].

Mpollei@gfnet.com at 20:07, 18 July 2023

2023-07-18T20:07:04Z

← Older revision		Revision as of 20:07, 18 July 2023
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	\|caption=		\|caption=
	<!-- Add picture caption -->		<!-- Add picture caption -->
	Example of a slope stability analysis. ([https://en.wikipedia.org/wiki/Slope_stability_analysis Wikipedia])		Example of a slope stability analysis.
			(Image Source: [https://en.wikipedia.org/wiki/Slope_stability_analysis Wikipedia])
	}}		}}

Mpollei@gfnet.com at 15:16, 11 July 2023

2023-07-11T15:16:07Z

← Older revision		Revision as of 15:16, 11 July 2023
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	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[Technical Release 210-60: Earth Dams and Reservoirs \| Technical Release 210-60: Earth Dams and Reservoirs, NRCS~~, 2019~~]]		{{Document Icon}} [[Technical Release 210-60: Earth Dams and Reservoirs \| Technical Release 210-60: Earth Dams and Reservoirs, NRCS]]
	{{Document Icon}} [[Design Standards No. 13: Embankment Dams (Ch. 4: Static Stability Analysis) \| Design Standards No. 13: Embankment Dams (Ch. 4: Static Stability Analysis), USBR~~, 2011~~]]		{{Document Icon}} [[Design Standards No. 13: Embankment Dams (Ch. 4: Static Stability Analysis) \| Design Standards No. 13: Embankment Dams (Ch. 4: Static Stability Analysis), USBR]]
	{{Document Icon}} [[Engineering Guidelines for the Evaluation of Hydropower Projects: Chapter 4- Embankment Dams \| Engineering Guidelines for the Evaluation of Hydropower Projects: Chapter 4- Embankment Dams, FERC~~, 2004~~]]		{{Document Icon}} [[Engineering Guidelines for the Evaluation of Hydropower Projects: Chapter 4- Embankment Dams \| Engineering Guidelines for the Evaluation of Hydropower Projects: Chapter 4- Embankment Dams, FERC]]
	{{Document Icon}} [[Slope Stability (EM 1110-2-1902) \| Slope Stability (EM 1110-2-1902), USACE~~, 2003~~]]		{{Document Icon}} [[Slope Stability (EM 1110-2-1902) \| Slope Stability (EM 1110-2-1902), USACE]]

	==Trainings==		==Trainings==

Grichards at 21:07, 15 March 2023

2023-03-15T21:07:05Z

← Older revision		Revision as of 21:07, 15 March 2023
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	==Types of Information Needed==		==Types of Information Needed==
	“The stability of dams and slopes must be evaluated utilizing pertinent geologic information and information regarding in situ [[engineering]] properties of soil and rock materials. The geologic information and site characteristics that should be considered include:		The key inputs to any slope stability model are [[Soil/Rock Strength Characterization for Stability Analysis\|unit weights and soil strength parameters]]. “The stability of dams and slopes must be evaluated utilizing pertinent geologic information and information regarding in situ [[engineering]] properties of soil and rock materials. The geologic information and site characteristics that should be considered include:

	#"[[groundwater]] and seepage conditions;		#"[[groundwater]] and seepage conditions;

Grichards at 21:01, 15 March 2023

2023-03-15T21:01:21Z

← Older revision		Revision as of 21:01, 15 March 2023
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	==Loading Conditions==		==Loading Conditions==
	“Evaluation of slope stability requires establishing the conditions, called ‘design conditions’ or ‘[[Loading Conditions\|loading conditions]],’ to which the slope may be subjected during its life, and performing analyses of stability for each of these conditions. There are four design conditions that must be considered for dams:		“Evaluation of slope stability requires establishing the conditions, called ‘design conditions’ or ‘[[Loading Conditions\|loading conditions]],’ to which the slope may be subjected during its life, and performing analyses of stability for each of these conditions. There are four design conditions that must be considered for dams:
	#[[Stability During and at the End of Construction\|~~during~~ and at the end of construction]],		#[[Stability During and at the End of Construction\|During and at the end of construction]],
	#[[Stability During Steady State Seepage Conditions\|~~steady~~ state seepage]],		#[[Stability During Steady State Seepage Conditions\|Steady state seepage]],
	#[[Stability During Sudden Drawdown\|~~sudden~~ drawdown]], and		#[[Stability During Sudden Drawdown\|Sudden drawdown]], and
	#[[Stability During an Earthquake\|~~earthquake~~ loading]].		#[[Stability During an Earthquake\|Earthquake loading]].


	"The first three conditions are static; the fourth involves dynamic loading”.<ref name="Slope Stability" />		"The first three conditions are static; the fourth involves dynamic loading”.<ref name="Slope Stability" />

Grichards at 21:00, 15 March 2023

2023-03-15T21:00:15Z

← Older revision		Revision as of 21:00, 15 March 2023
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	[[Stability]] of the upstream and downstream slopes of an earth embankment dam is essential to the dam’s safe [[operation]]. Unsatisfactory slope performance includes the following categories of slope movement: shear failure, surface sloughing, excessive deformation, liquefaction, and any other types of slope movements <ref name="Slope Stability">[[Slope Stability (EM 1110-2-1902)\| Slope Stability (EM 1110-2-1902), USACE, 2003]]</ref>. Slope movements that do not cause an immediate failure of the dam can require significant maintenance, and if left unrepaired, can lead to an eventual failure. Proper analysis and design of the embankment slopes, coupled with close monitoring and prompt maintenance or repairs to any moved sections of the slope(s) are key to preventing failure or a major incident from occurring.		[[Stability]] of the upstream and downstream slopes of an earth embankment dam is essential to the dam’s safe [[operation]]. Unsatisfactory slope performance includes the following categories of slope movement: shear failure, surface sloughing, excessive deformation, liquefaction, and any other types of slope movements <ref name="Slope Stability">[[Slope Stability (EM 1110-2-1902)\| Slope Stability (EM 1110-2-1902), USACE, 2003]]</ref>. Slope movements that do not cause an immediate failure of the dam can require significant maintenance, and if left unrepaired, can lead to an eventual failure. Proper analysis and design of the embankment slopes, coupled with close monitoring and prompt maintenance or repairs to any moved sections of the slope(s) are key to preventing failure or a major incident from occurring.

			==Loading Conditions==
	“Evaluation of slope stability requires establishing the conditions, called ‘design conditions’ or ‘[[Loading Conditions\|loading conditions]],’ to which the slope may be subjected during its life, and performing analyses of stability for each of these conditions. There are four design conditions that must be considered for dams:		“Evaluation of slope stability requires establishing the conditions, called ‘design conditions’ or ‘[[Loading Conditions\|loading conditions]],’ to which the slope may be subjected during its life, and performing analyses of stability for each of these conditions. There are four design conditions that must be considered for dams:
	#[[Stability During and at the End of Construction\|during and at the end of construction]],		#[[Stability During and at the End of Construction\|during and at the end of construction]],
Line 22:		Line 23:
	#[[Stability During Sudden Drawdown\|sudden drawdown]], and		#[[Stability During Sudden Drawdown\|sudden drawdown]], and
	#[[Stability During an Earthquake\|earthquake loading]].		#[[Stability During an Earthquake\|earthquake loading]].

	"The first three conditions are static; the fourth involves dynamic loading”.<ref name="Slope Stability" />		"The first three conditions are static; the fourth involves dynamic loading”.<ref name="Slope Stability" />

			==Types of Information Needed==
	“The stability of dams and slopes must be evaluated utilizing pertinent geologic information and information regarding in situ [[engineering]] properties of soil and rock materials. The geologic information and site characteristics that should be considered include:		“The stability of dams and slopes must be evaluated utilizing pertinent geologic information and information regarding in situ [[engineering]] properties of soil and rock materials. The geologic information and site characteristics that should be considered include:

Grichards at 20:58, 15 March 2023

2023-03-15T20:58:06Z

← Older revision		Revision as of 20:58, 15 March 2023
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	<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->		<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->
	[[Stability]] of the upstream and downstream slopes of an earth embankment dam is essential to the dam’s safe [[operation]]. Unsatisfactory slope performance includes the following categories of slope movement: shear failure, surface sloughing, excessive deformation, liquefaction, and any other types of slope movements <ref name="Slope Stability">[[Slope Stability (EM 1110-2-1902)\| Slope Stability (EM 1110-2-1902), USACE, 2003]]</ref>. Slope movements that do not cause an immediate failure of the dam can require significant maintenance, and if left unrepaired, can lead to an eventual failure. Proper analysis and design of the embankment slopes, coupled with close monitoring and prompt maintenance or repairs to any moved sections of the slope(s) are key to preventing failure or a major incident from occurring.		[[Stability]] of the upstream and downstream slopes of an earth embankment dam is essential to the dam’s safe [[operation]]. Unsatisfactory slope performance includes the following categories of slope movement: shear failure, surface sloughing, excessive deformation, liquefaction, and any other types of slope movements <ref name="Slope Stability">[[Slope Stability (EM 1110-2-1902)\| Slope Stability (EM 1110-2-1902), USACE, 2003]]</ref>. Slope movements that do not cause an immediate failure of the dam can require significant maintenance, and if left unrepaired, can lead to an eventual failure. Proper analysis and design of the embankment slopes, coupled with close monitoring and prompt maintenance or repairs to any moved sections of the slope(s) are key to preventing failure or a major incident from occurring.

			“Evaluation of slope stability requires establishing the conditions, called ‘design conditions’ or ‘[[Loading Conditions\|loading conditions]],’ to which the slope may be subjected during its life, and performing analyses of stability for each of these conditions. There are four design conditions that must be considered for dams:
			#[[Stability During and at the End of Construction\|during and at the end of construction]],
			#[[Stability During Steady State Seepage Conditions\|steady state seepage]],
			#[[Stability During Sudden Drawdown\|sudden drawdown]], and
			#[[Stability During an Earthquake\|earthquake loading]].
			"The first three conditions are static; the fourth involves dynamic loading”.<ref name="Slope Stability" />

	“The stability of dams and slopes must be evaluated utilizing pertinent geologic information and information regarding in situ [[engineering]] properties of soil and rock materials. The geologic information and site characteristics that should be considered include:		“The stability of dams and slopes must be evaluated utilizing pertinent geologic information and information regarding in situ [[engineering]] properties of soil and rock materials. The geologic information and site characteristics that should be considered include:
Line 29:		Line 36:
	#"slickensides;		#"slickensides;
	#"field evidence relating to slides, earthquake activity, movement along existing faults, and tension jointing”.<ref name="Slope Stability"/></br></br>		#"field evidence relating to slides, earthquake activity, movement along existing faults, and tension jointing”.<ref name="Slope Stability"/></br></br>

	“Evaluation of slope stability requires: (a) establishing the conditions, called ‘design conditions’ or ‘[[Loading Conditions\|loading conditions]],’ to which the slope may be subjected during its life, and (b) performing analyses of stability for each of these conditions. There are four design conditions that must be considered for dams: (1) during and at the end of [[construction]], (2) steady state seepage, (3) sudden drawdown, and (4) earthquake loading. The first three conditions are static; the fourth involves dynamic loading”.<ref name="Slope Stability" />

	==Examples==		==Examples==

Grichards at 22:29, 21 February 2023

2023-02-21T22:29:38Z

← Older revision		Revision as of 22:29, 21 February 2023
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	{{Video Icon}} [[On-Demand Webinar: Strength Selection for Static Slope Stability Analysis]]		{{Video Icon}} [[On-Demand Webinar: Strength Selection for Static Slope Stability Analysis]]
	{{Video Icon}} [[On-Demand Webinar: Seismic Stability Evaluation of Earth Dams]]		{{Video Icon}} [[On-Demand Webinar: Seismic Stability Evaluation of Earth Dams]]
			{{Website Icon}} [[Technical Seminar: Stability Analysis of Embankment Dams]]

	<!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply enclose the citation as shown <ref> citation </ref> in the location of the in text mention. Citations will automatically populate below-->		<!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply enclose the citation as shown <ref> citation </ref> in the location of the in text mention. Citations will automatically populate below-->

Rmanwaring at 20:16, 20 December 2022

2022-12-20T20:16:20Z

← Older revision		Revision as of 20:16, 20 December 2022
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	<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->		<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed -->
	[[Stability]] of the upstream and downstream slopes of an earth embankment dam is essential to the dam’s safe [[operation]]. Unsatisfactory slope performance includes the following categories of slope movement: shear failure, surface sloughing, excessive deformation, liquefaction, and any other types of slope movements <ref name="Slope Stability">[[Slope Stability (EM 1110-2-1902)\| EM 1110-2-1902 ~~Slope Stability~~, USACE, 2003]]</ref>. Slope movements that do not cause an immediate failure of the dam can require significant maintenance, and if left unrepaired, can lead to an eventual failure. Proper analysis and design of the embankment slopes, coupled with close monitoring and prompt maintenance or repairs to any moved sections of the slope(s) are key to preventing failure or a major incident from occurring.		[[Stability]] of the upstream and downstream slopes of an earth embankment dam is essential to the dam’s safe [[operation]]. Unsatisfactory slope performance includes the following categories of slope movement: shear failure, surface sloughing, excessive deformation, liquefaction, and any other types of slope movements <ref name="Slope Stability">[[Slope Stability (EM 1110-2-1902)\| Slope Stability (EM 1110-2-1902), USACE, 2003]]</ref>. Slope movements that do not cause an immediate failure of the dam can require significant maintenance, and if left unrepaired, can lead to an eventual failure. Proper analysis and design of the embankment slopes, coupled with close monitoring and prompt maintenance or repairs to any moved sections of the slope(s) are key to preventing failure or a major incident from occurring.

	“The stability of dams and slopes must be evaluated utilizing pertinent geologic information and information regarding in situ [[engineering]] properties of soil and rock materials. The geologic information and site characteristics that should be considered include: ~~(1)~~ [[groundwater]] and seepage conditions; ~~(2)~~ lithology, stratigraphy, and geologic details disclosed by borings and geologic interpretations; ~~(3)~~ maximum past overburden at the site as deduced from geologic evidence; ~~(4)~~ structure, including bedding, folding, and faulting; ~~(5)~~ alteration of materials by faulting; ~~(6)~~ joints and joint systems; ~~(7)~~ weathering; ~~(8)~~ cementation; ~~(9)~~ slickensides; ~~(10)~~ field evidence relating to slides, earthquake activity, movement along existing faults, and tension jointing”.<ref name="Slope Stability" />		“The stability of dams and slopes must be evaluated utilizing pertinent geologic information and information regarding in situ [[engineering]] properties of soil and rock materials. The geologic information and site characteristics that should be considered include:

			#"[[groundwater]] and seepage conditions;
			#"lithology, stratigraphy, and geologic details disclosed by borings and geologic interpretations;
			#"maximum past overburden at the site as deduced from geologic evidence;
			#"structure, including bedding, folding, and faulting;
			#"alteration of materials by faulting;
			#"joints and joint systems;
			#"weathering;
			#"cementation;
			#"slickensides;
			#"field evidence relating to slides, earthquake activity, movement along existing faults, and tension jointing”.<ref name="Slope Stability"/></br></br>

	“Evaluation of slope stability requires: (a) establishing the conditions, called ‘design conditions’ or ‘[[Loading Conditions\|loading conditions]],’ to which the slope may be subjected during its life, and (b) performing analyses of stability for each of these conditions. There are four design conditions that must be considered for dams: (1) during and at the end of [[construction]], (2) steady state seepage, (3) sudden drawdown, and (4) earthquake loading. The first three conditions are static; the fourth involves dynamic loading”.<ref name="Slope Stability" />		“Evaluation of slope stability requires: (a) establishing the conditions, called ‘design conditions’ or ‘[[Loading Conditions\|loading conditions]],’ to which the slope may be subjected during its life, and (b) performing analyses of stability for each of these conditions. There are four design conditions that must be considered for dams: (1) during and at the end of [[construction]], (2) steady state seepage, (3) sudden drawdown, and (4) earthquake loading. The first three conditions are static; the fourth involves dynamic loading”.<ref name="Slope Stability" />
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	==Examples==		==Examples==
	{{Website Icon}} [https://damfailures.org/lessons-learned/earth-and-rockfill-embankment-dams-must-be-stable-under-the-full-range-of-anticipated-loading-conditions/ Learn more about the need for stable slopes at earth and rockfill dams (DamFailures.org)]		{{Website Icon}} [https://damfailures.org/lessons-learned/earth-and-rockfill-embankment-dams-must-be-stable-under-the-full-range-of-anticipated-loading-conditions/ Learn more about the need for stable slopes at earth and rockfill dams (DamFailures.org)]

	==Best Practices Resources==		==Best Practices Resources==
	{{Document Icon}} [[~~Slope Stability (EM 1110~~-~~2-1902)~~\|~~Slope Stability (EM 1110~~-~~2-1902) (U.S. Army Corps of Engineers)~~]]		{{Document Icon}} [[Technical Release 210-60: Earth Dams and Reservoirs \| Technical Release 210-60: Earth Dams and Reservoirs, NRCS, 2019]]
	{{Document Icon}} [[Design Standards No. 13: Embankment Dams (Ch. 4: Static Stability Analysis)\|Design Standards No. 13: Embankment Dams (Ch. 4: Static Stability Analysis) ~~(Bureau of Reclamation)~~]]		{{Document Icon}} [[Design Standards No. 13: Embankment Dams (Ch. 4: Static Stability Analysis) \| Design Standards No. 13: Embankment Dams (Ch. 4: Static Stability Analysis), USBR, 2011]]
	{{Document Icon}} [[Engineering Guidelines for the Evaluation of Hydropower Projects: Chapter 4- Embankment Dams\|Engineering Guidelines for the Evaluation of Hydropower Projects: Chapter 4- Embankment Dams ~~(Federal Energy Regulatory Commission)~~]]		{{Document Icon}} [[Engineering Guidelines for the Evaluation of Hydropower Projects: Chapter 4- Embankment Dams \| Engineering Guidelines for the Evaluation of Hydropower Projects: Chapter 4- Embankment Dams, FERC, 2004]]
	{{Document Icon}} [[~~Technical Release 210~~-~~60: Earth Dams and Reservoirs~~\|~~Technical Release 210~~-~~60: Earth Dams and Reservoirs (Natural Resources Conservation Service~~)]]		{{Document Icon}} [[Slope Stability (EM 1110-2-1902) \| Slope Stability (EM 1110-2-1902), USACE, 2003]]

	==Trainings==		==Trainings==
	{{Video Icon}} [[On-Demand Webinar: Strength Selection for Static Slope Stability Analysis]]		{{Video Icon}} [[On-Demand Webinar: Strength Selection for Static Slope Stability Analysis]]

← Older revision		Revision as of 05:31, 7 September 2023
Line 21:		Line 21:
	“Evaluation of slope stability requires establishing the conditions, called ‘design conditions’ or ‘[[Loading Conditions\|loading conditions]],’ to which the slope may be subjected during its life, and performing analyses of stability for each of these conditions. There are four design conditions that must be considered for dams:		“Evaluation of slope stability requires establishing the conditions, called ‘design conditions’ or ‘[[Loading Conditions\|loading conditions]],’ to which the slope may be subjected during its life, and performing analyses of stability for each of these conditions. There are four design conditions that must be considered for dams:
	#[[Stability During and at the End of Construction\|During and at the end of construction]],		#[[Stability During and at the End of Construction\|During and at the end of construction]],
	#[[Stability During Steady State Seepage Conditions\|Steady state seepage]],		#[[Stability During Steady State Seepage Conditions\|Steady state seepage]] (both normal and [[Flood Conditions\|flood conditions]]),
	#[[Stability During Sudden Drawdown\|Sudden drawdown]], and		#[[Stability During Sudden Drawdown\|Sudden drawdown]], and
	#[[Stability During an Earthquake\|Earthquake loading]].		#[[Stability During an Earthquake\|Earthquake loading]].

← Older revision		Revision as of 21:01, 15 March 2023
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	==Loading Conditions==		==Loading Conditions==
	“Evaluation of slope stability requires establishing the conditions, called ‘design conditions’ or ‘[[Loading Conditions\|loading conditions]],’ to which the slope may be subjected during its life, and performing analyses of stability for each of these conditions. There are four design conditions that must be considered for dams:		“Evaluation of slope stability requires establishing the conditions, called ‘design conditions’ or ‘[[Loading Conditions\|loading conditions]],’ to which the slope may be subjected during its life, and performing analyses of stability for each of these conditions. There are four design conditions that must be considered for dams:
	#[[Stability During and at the End of Construction\|~~during~~ and at the end of construction]],		#[[Stability During and at the End of Construction\|During and at the end of construction]],
	#[[Stability During Steady State Seepage Conditions\|~~steady~~ state seepage]],		#[[Stability During Steady State Seepage Conditions\|Steady state seepage]],
	#[[Stability During Sudden Drawdown\|~~sudden~~ drawdown]], and		#[[Stability During Sudden Drawdown\|Sudden drawdown]], and
	#[[Stability During an Earthquake\|~~earthquake~~ loading]].		#[[Stability During an Earthquake\|Earthquake loading]].


	"The first three conditions are static; the fourth involves dynamic loading”.<ref name="Slope Stability" />		"The first three conditions are static; the fourth involves dynamic loading”.<ref name="Slope Stability" />