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Bridge Scour Prevention

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Bridge Scour Prevention

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  1. <?xml version="1.0"?><AllQuestions /> <?xml version="1.0"?><AllResponses /> <?xml version="1.0"?><Settings><answerBulletFormat>Numeric</answerBulletFormat><answerNowAutoInsert>No</answerNowAutoInsert><answerNowStyle>Explosion</answerNowStyle><answerNowText>Answer Now</answerNowText><chartColors>Use PowerPoint Color Scheme</chartColors><chartType>Horizontal</chartType><correctAnswerIndicator>Checkmark</correctAnswerIndicator><countdownAutoInsert>No</countdownAutoInsert><countdownSeconds>10</countdownSeconds><countdownSound>TicToc.wav</countdownSound><countdownStyle>Box</countdownStyle><gridAutoInsert>No</gridAutoInsert><gridFillStyle>Answered</gridFillStyle><gridFillColor>255,255,0</gridFillColor><gridOpacity>50%</gridOpacity><gridTextStyle>Keypad #</gridTextStyle><inputSource>Response Devices</inputSource><multipleResponseDivisor># of Responses</multipleResponseDivisor><participantsLeaderBoard>5</participantsLeaderBoard><percentageDecimalPlaces>0</percentageDecimalPlaces><responseCounterAutoInsert>No</responseCounterAutoInsert><responseCounterStyle>Oval</responseCounterStyle><responseCounterDisplayValue># of Votes Received</responseCounterDisplayValue><insertObjectUsingColor>Red</insertObjectUsingColor><showResults>Yes</showResults><teamColors>Use PowerPoint Color Scheme</teamColors><teamIdentificationType>None</teamIdentificationType><teamScoringType>Voting pads only</teamScoringType><teamScoringDecimalPlaces>1</teamScoringDecimalPlaces><teamIdentificationItem></teamIdentificationItem><teamsLeaderBoard>5</teamsLeaderBoard><teamName1></teamName1><teamName2></teamName2><teamName3></teamName3><teamName4></teamName4><teamName5></teamName5><teamName6></teamName6><teamName7></teamName7><teamName8></teamName8><teamName9></teamName9><teamName10></teamName10><showControlBar>All Slides</showControlBar><defaultCorrectPointValue>0</defaultCorrectPointValue><defaultIncorrectPointValue>0</defaultIncorrectPointValue><chartColor1>187,224,227</chartColor1><chartColor2>51,51,153</chartColor2><chartColor3>0,153,153</chartColor3><chartColor4>153,204,0</chartColor4><chartColor5>128,128,128</chartColor5><chartColor6>0,0,0</chartColor6><chartColor7>0,102,204</chartColor7><chartColor8>204,204,255</chartColor8><chartColor9>255,0,0</chartColor9><chartColor10>255,255,0</chartColor10><teamColor1>187,224,227</teamColor1><teamColor2>51,51,153</teamColor2><teamColor3>0,153,153</teamColor3><teamColor4>153,204,0</teamColor4><teamColor5>128,128,128</teamColor5><teamColor6>0,0,0</teamColor6><teamColor7>0,102,204</teamColor7><teamColor8>204,204,255</teamColor8><teamColor9>255,0,0</teamColor9><teamColor10>255,255,0</teamColor10><displayAnswerImagesDuringVote>Yes</displayAnswerImagesDuringVote><displayAnswerImagesWithResponses>Yes</displayAnswerImagesWithResponses><displayAnswerTextDuringVote>Yes</displayAnswerTextDuringVote><displayAnswerTextWithResponses>Yes</displayAnswerTextWithResponses><questionSlideID></questionSlideID><controlBarState>Expanded</controlBarState><isGridColorKnownColor>True</isGridColorKnownColor><gridColorName>Yellow</gridColorName></Settings> <?xml version="1.0"?><AllAnswers /> Bridge Scour Prevention Presentors: Tom Hardinger – Wisconsin DOT Eugene Hietpas – Collins Engineers Inc. This presentation and its contents may not be duplicated or reproduced without the expressed written consent of Collins Engineers, Inc.

  2. NC Region Various Structures – Structures B-37-0187, B-71-0018, B-49-0090 Background Information Design Phase Construction Phase As-Builts

  3. Background Information • Project included 3 bridges over Wisconsin River (Marathon, Portage and Wood Counties in central Wisconsin). • Substructure units are conventional seal, footing and pier walls. • Major flood events 2008, 2010 and 2011. • Post-flood dive inspections revealed major scour issues with streambed and/or substructure undermining. • Project initiated in 2011 and built in late 2012.

  4. B-37-187, STH 34, Knowlton • Built 1969. • Multi-span steel girder spans. • 20-38’ water depth. • 8-10’ streambed degradation during 2008 flood exposed seal-to-rock interface. Mitigated piers 2 and 3.

  5. B-49-90, CTH HH, Stevens Point • Built 1999. • Multi-span pre-stressed girder spans. • 8-15’ water depth. • Pier 4 Seal undermining at upstream nose.

  6. B-49-90 Existing Condition

  7. B-71-18, STH 73, Nekoosa • Built 1962. • Multi-span steel girder spans. • 15-22’ water depth. • Localized scour at piers 2 thru 6.

  8. Design Considerations • Permanent vs. Temporary Repairs. • Alternatives. • Conventional Riprap placement. • Articulated grout mats/grout bags and structural grout. • Traffic disruptions. • Environmental. • Project Inspection - Most work underwater.

  9. Design Challenges • Limited WDOT history/experience (design and construction). • HEC 23 guidelines. • Input from other states: Montana, Iowa, MN. • Input from industry. • Environmental. • Aquatic bed impacts. • Development of Specifications.

  10. Project Detail of Scour Repairs

  11. Project 1009-45-65 • Designed by NCR and BOS. • Let August 14, 2012. • Cost $532,111. • Scour Repair Grout: $4,829/CY (6 CY). • Grout Bags: $482/CY (402 CY). • 4 “ Grout Mats: $837/CY (256 CY). • Contractor: JF Brennan Company, La Crosse.

  12. NC Region Various Structures – Structures B-37-0187, B-71-0018, B-49-0090 • Construction • 3D Imaging • Design Phase/Pre-construction • As-Builts

  13. The Challenge • Can You See Me Now?

  14. Installation/Layout • Issues

  15. As-Builts

  16. As-Builts

  17. As-Builts

  18. Questions Contact: Eugene Hietpas ehietpas@collinsengr.com Tom Hardinger Thomas.hardinger@dot.wi.gov

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