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Earth Dam / Levees

PROBLEM

Earth dam failure is an important issue engineers must consider during reservoir filling. Factors such as internal erosion and piping occurrences caused by seepage can lead to dam failure, resulting in a disaster. The initial slope stability of earth dams and levees must also be performed such that the risk of slope failures is minimized.

SOLUTION

The complete solution for the analysis of earth dams and levees involves a number of related numerical analyses. The most prevalent of these are:

  • Slope stability analysis
  • Seepage analysis

SVSLOPE is the most comprehensive tool currently available for the analysis of levee stability. It analyzes slope stability from a stress-based or limit equilibrium approach and implements advanced features such as:

  • 3D analysis of slope stability and seepage
  • Mesh refinement to handle zones of high gradient
  • Advanced probabilistic analysis with the APEM method
  • Combined seepage and slope stability analysis possible using SVSLOPE and SVFLUX
  • Rapid drawdown by the total (Duncan 3-stage), or effective stress method
  • Most advanced representation of the upstream seepage boundary condition

Seepage analyses (SVFLUX) are an important tool for assessing the possibility of seepage failure in dams and studying hydraulic conditions for then calculating the stability of earth dams. SVSLOPE may be used to calculate the stability of levees and earth dams under unsaturated conditions, with fluctuating water tables, and under rapid drawdown scenarios. The stresses (and potential deformations) encountered in earth dams may also be modeled using the SVSOLID software. Finite element scenarios may be evaluated in 2D or 3D.

Please note that most of these models can be downloaded through our SVOffice product suite.

Additional Articles


Bowles95a

Example problem originally published by Bowles in 1984.

Model filename: EarthDams > Bowles95a.svm

Tags: EarthDams,SVFLUX,2D,Steady-State,Water resources management,Earth Dam / Levees,EarthDams,Benchmarking

Attachments:

Bowles95b

Example problem originally published by Bowles in 1984.

Model filename: EarthDams > Bowles95b.svm

Tags: EarthDams,SVFLUX,2D,Steady-State,EarthDams,Water resources management,Earth Dam / Levees

Attachments:

ClayDamNotchedSimple

Typical clay dam representation. Creation time = 14 minutes.

Model filename: EarthDams > ClayDamNotchedSimple.svm

Tags: EarthDams,EarthDams,SVFLUX,2D,Steady-State,Earth Dam / Levees,Water resources management

Attachments:

ComplexDam

This model was created by importing geometry from an AutoCAD DXF file.The purpose of this numerical model is to illustrate the ability of SVFLUX to automatically create a mesh and analyze a very detailed earth dam cross-section.

Model filename: EarthDams > ComplexDam.svm

Tags: EarthDams,SVFLUX,2D,Steady-State,Earth Dam / Levees,Water resources management,EarthDams

Attachments:

Cutoff

The intent of this numerical model is to determine the proper location of flow lines given that there is a cut off wall placed beneath a weir. This model is a very classic numerical model that has been traditionally solved with the use of flow lines and manual construction means. A number of solutions to this model are available using flow nets.

Model filename: EarthDams > Cutoff.svm

Tags: EarthDams,SVFLUX,2D,Steady-State,EarthDams,Earth Dam / Levees,Water resources management,Cutoff Wall,Benchmarking

Attachments:

DamInValley07

Model file demonstrating the use of pinched out surfaces in 3D to model an earth dam structure.

Model filename: EarthDams > DamInValley07.svm

Tags: EarthDams,SVFLUX,3D,Steady-State,EarthDams,Earth Dam / Levees,Water resources management

Attachments:

DamInValleySimple

Illustration of simple dam in a valley.

Model filename: EarthDams > DamInValleySimple.svm

Tags: EarthDams,SVFLUX,3D,Steady-State,Water resources management,Earth Dam / Levees

Attachments:

Earth Dam Core ImperviousFoundation

SoilVision Systems Ltd. is pleased to announce the addition of new distribution models which simulate situations described in the Engineering and Design Manual for Coal Refuse Disposal Facilities which is distributed by the Mine Safety and Health Administration (MSHA). The models were developed in order to facilitate the training of mining companies on the use of the SVOffice software in this industry. The models represent typical situations and design scenarios outlined in the design manual for the construction of earth dams for containment facilities.

Model filename: MSHA > Earth Dam Core ImperviousFoundation.svm

Tags: MSHA,MSHA,Steady-State,2D,Earth Dam / Levees,SVFLUX

Attachments:

Earth Dam DeepPerviousFoundation BlanketDrain

SoilVision Systems Ltd. is pleased to announce the addition of new distribution models which simulate situations described in the Engineering and Design Manual for Coal Refuse Disposal Facilities which is distributed by the Mine Safety and Health Administration (MSHA). The models were developed in order to facilitate the training of mining companies on the use of the SVOffice software in this industry. The models represent typical situations and design scenarios outlined in the design manual for the construction of earth dams for containment facilities.

Model filename: MSHA > Earth Dam DeepPerviousFoundation BlanketDrain.svm

Tags: MSHA,Steady-State,Earth Dam / Levees,MSHA,2D,SVFLUX

Attachments:

Earth Dam DeepPerviousFoundation ChimneyBlanketDrain

SoilVision Systems Ltd. is pleased to announce the addition of new distribution models which simulate situations described in the Engineering and Design Manual for Coal Refuse Disposal Facilities which is distributed by the Mine Safety and Health Administration (MSHA). The models were developed in order to facilitate the training of mining companies on the use of the SVOffice software in this industry. The models represent typical situations and design scenarios outlined in the design manual for the construction of earth dams for containment facilities.

Model filename: MSHA > Earth Dam DeepPerviousFoundation ChimneyBlanketDrain.svm

Tags: MSHA,2D,SVFLUX,Earth Dam / Levees,MSHA,Steady-State

Attachments:

Earth Dam FoundationContact

The earth dam foundation contact model is a classic numerical model which is described in the Engineering and Design Manual for Coal Refuse Disposal Facilities which is distributed by the Mine Safety and Health Administration (MSHA). The numerical model is used to assess the effectiveness of a clay core in dissipating the energy of water.

Model filename: MSHA > Earth Dam FoundationContact.svm

Tags: MSHA,Earth Dam / Levees,MSHA,SVFLUX,Steady-State,2D

Attachments:

EarthDamCutoffFlow

Simple model of an earth dam. English units used. Model creation time = 46 minutes.

Model filename: EarthDams > EarthDamCutoffFlow.svm

Tags: EarthDams,EarthDams,SVFLUX,2D,Steady-State,Earth Dam / Levees,Water resources management

Attachments:

EarthDamLow

This particular numerical model must illustrate the use of seepage software to determine the relative flux, which might occur through an earth dam compared to underneath an earth dam.

Model filename: EarthDams > EarthDamLow.svm

Tags: EarthDams,EarthDams,SVFLUX,2D,Steady-State,Earth Dam / Levees,Water resources management

Attachments:

EarthDamPit

Demonstration of an earth dam containing a pit of tailings. Created using surfaces defined by planes.

Model filename: EarthDams > EarthDamPit.svm

Tags: EarthDams,SVFLUX,3D,Transient,Water Table,Precipitation,Water resources management,Earth Dam / Levees

Attachments:

EarthDamToe

This model creates a simple two-region model in which there is a significantly sized filter at the downstream toe of the earth dam. The purpose is to determine the effect on the resulting water table and how it will impact design of the downstream filter.

Model filename: EarthDams > EarthDamToe.svm

Tags: EarthDams,EarthDams,SVFLUX,2D,Steady-State,Earth Dam / Levees,Water resources management

Attachments:

EarthDam_NoDrainageBlanket

Homogenous earth dam to be used for comparison against EarthDam_WithDrainageBlanket.

Model filename: EarthDams > EarthDam_NoDrainageBlanket.svm

Tags: EarthDams,SVFLUX,2D,Steady-State,Water resources management,Earth Dam / Levees

Attachments:

EarthDam_WithDrainageBlanket

Earth dam that replicates EarthDam_NoDrainageBlanket except with the inclusion of a drainage blanket designed to reduce piping failures.

Model filename: EarthDams > EarthDam_WithDrainageBlanket.svm

Tags: EarthDams,SVFLUX,2D,Steady-State,Water resources management,Earth Dam / Levees

Attachments:

EarthFillDamSto100

This problem will determine the final position of the phreatic surface and the flux rate through an earth fill dam. The model will perform a stochastic analysis. Run 200 points.

Model filename: EarthDams > EarthFillDamSto100.svm

Tags: EarthDams,SVFLUX,2D,Steady-State,EarthDams,Water resources management,Earth Dam / Levees

Attachments:

Earth_Dam

Pentland (2000). This scenario involves the use of a review by pressure calculation of the location of the downstream exit point. This numerical model is intended to be one of the simple forms of creating a flow model for an earth dam. It is a homogenous numerical model in which the boundary conditions and material properties and entire model set up are simplified greatly.

Model filename: EarthDams > Earth_Dam.svm

Tags: EarthDams,SVFLUX,2D,Steady-State,EarthDams,Water resources management,Earth Dam / Levees,Benchmarking

Attachments:

Earth_Fill_Dam

This model will determine the final position of the phreatic surface and the flux rate through an earth fill dam.The earth fill dam example is the classic numerical model.The model is used to assess the effectiveness of a clay core in dissipating the energy of the water.

Model filename: EarthDams > Earth_Fill_Dam.svm

Tags: EarthDams,SVFLUX,2D,Steady-State,Earth Dam / Levees,Water resources management,Benchmarking,EarthDams

Attachments:

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