research and development inland waterways conference 7 march 2007 improved hydrodynamic...
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![Page 1: Research and Development Inland Waterways Conference 7 March 2007 Improved Hydrodynamic Design/Detection and Evaluation of Scour at Dams John E. Hite,](https://reader035.vdocuments.net/reader035/viewer/2022062722/56649f315503460f94c4d12e/html5/thumbnails/1.jpg)
Research and Development
Inland Waterways Conference 7 March 2007
Improved Hydrodynamic Design/Detection and Evaluation
of Scour at Dams
John E. Hite, Jr.ERDC – Coastal and Hydraulics Laboratory
Navigation Branch
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Research and Development
Hydrodynamic Design of Inland Structures
• PI: Richard Stockstill & Mark Hopkins
• Challenges– Model ice and debris at locks.
– Integration of structural and hydraulic modeling (Ice & debris, tows, guard walls, gates, barge impacts)
• Final Products– Coupled ADH/DEM code to
simulate fluid/structural interaction locks and dams.
• PI: Richard Stockstill & Mark Hopkins
• Challenges– Model ice and debris at locks.
– Integration of structural and hydraulic modeling (Ice & debris, tows, guard walls, gates, barge impacts)
• Final Products– Coupled ADH/DEM code to
simulate fluid/structural interaction locks and dams.
• Benefits: Simulation Tool– Unique ability to model
fluid/structure interactions.
– Placement of emergency lock bulkheads and dam gates. (hydraulic forces during placement).
– Placement of float-in lock components.
• Benefits: Simulation Tool– Unique ability to model
fluid/structure interactions.
– Placement of emergency lock bulkheads and dam gates. (hydraulic forces during placement).
– Placement of float-in lock components.
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Research and Development
Hydrodynamic Design
ADH – ADaptive Hydraulics Numerical Flow Model
Suite of finite element models including
2D shallow-water and 3D Navier Stokes modules
DEM - Discrete Element Model
A computer program that models the dynamics of
a system of discrete particles ie. ice, debris, barges
ADH – ADaptive Hydraulics Numerical Flow Model
Suite of finite element models including
2D shallow-water and 3D Navier Stokes modules
DEM - Discrete Element Model
A computer program that models the dynamics of
a system of discrete particles ie. ice, debris, barges
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Research and Development
Concept Design for Ice Passage Gap in Guard Wall from Coupled ADH and DEM Models
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Research and Development
Concept Design for Vessel Barrier from Coupled ADH and DEM Models
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Research and Development
Concept Design for Vessel Barrier from Coupled ADH and DEM Models
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Research and Development
Detection and Evaluation of Scour Protection
• PI: John Hite• Problem:
– Scour at dams reduces project reliability; Age, extreme flow events, barge accidents can cause scour protection problems; need better tools and guidance for measuring and predicting scour
• Products:– Demo project (Starved Rock Dam) – 07/06– Recommendations for tools/techniques
for scour detection – 09/07• Benefits:
– Process to assess repair needs– Better prediction of maintenance/rehab
costs– Reduced chance of failure
• PI: John Hite• Problem:
– Scour at dams reduces project reliability; Age, extreme flow events, barge accidents can cause scour protection problems; need better tools and guidance for measuring and predicting scour
• Products:– Demo project (Starved Rock Dam) – 07/06– Recommendations for tools/techniques
for scour detection – 09/07• Benefits:
– Process to assess repair needs– Better prediction of maintenance/rehab
costs– Reduced chance of failure
Underwater Imaging
Illinois Waterway Project
Barge Accident- Ohio River
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Research and Development
Causes of ScourCauses of Scour
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Research and Development
Scour Profiles from Periodic Inspections
Dam 2 on the Mississippi River Dam 2 on the Mississippi River
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Research and Development
Water Depths from Hydrographic Surveys
Starved Rock Dam on the Illinois WaterwayStarved Rock Dam on the Illinois Waterway
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Research and Development
Acoustical Camera Demonstration
03.1
/ln22
DC VV
DECE
Tracking Total Station for Position
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Research and Development
Engineering Parameters for Risk Analysis
• Stone Size, D50
• Riprap Stability Coefficient, C
• Stone Weight, ζs
• Unit Discharge, q
• Depth over Basin, d
• Stone Size, D50
• Riprap Stability Coefficient, C
• Stone Weight, ζs
• Unit Discharge, q
• Depth over Basin, d
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Research and Development
Determine Reliability of Scour Protection
03.1
/ln22
DC VV
DECE
Example: Point Estimate Method
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Research and Development
Determine Reliability of Structural Components
• Pile Supports for Stilling Basin
• Stilling Basin Concrete
• Steel Sheet Piling
• Gated Dam
• Pile Supports for Stilling Basin
• Stilling Basin Concrete
• Steel Sheet Piling
• Gated Dam
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Research and Development
Possible Outcomes from Analysis
• Immediate Rehabilitation
• Fix-as-Fail
• Advanced Maintenance
• Immediate Rehabilitation
• Fix-as-Fail
• Advanced Maintenance
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Research and Development
ERDC Points of Contact
• Inland Navigation Focus Area - John Hite (601) 634-2402, [email protected]
• Hydrodynamic Design – Richard Stockstill (601) 634-4251, [email protected]
Mark Hopkins (603) 646-4249, [email protected]
• Inland Navigation Focus Area - John Hite (601) 634-2402, [email protected]
• Hydrodynamic Design – Richard Stockstill (601) 634-4251, [email protected]
Mark Hopkins (603) 646-4249, [email protected]