Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/31365
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dc.contributor.authorBurnham, Benjamin C.-
dc.contributor.authorThomas, Marshall P.-
dc.contributor.authorVaughan, Jane M.-
dc.date.accessioned2019-01-15T20:50:41Z-
dc.date.available2019-01-15T20:50:41Z-
dc.date.issued2018-12-
dc.identifier.govdocERDC/CHL TR-18-18-
dc.identifier.urihttp://hdl.handle.net/11681/31365-
dc.identifier.urihttp://dx.doi.org/10.21079/11681/31365-
dc.descriptionTechnical Report-
dc.description.abstractConcrete degradation issues due to riprap entrainment have been observed in the stilling basin at Foster Joseph Sayers Dam. This entrapment occurs during normal flows. The original stilling basin has experienced excessive degradation, and repairs to restore it to original specifications are needed. A physical model study has been performed to determine the flow characteristics of the stilling basin and to develop a design modification to minimize riprap entrapment. The riprap originates in an area that could be replaced with a concrete pad to prevent further riprap entrainment in the stilling basin. A final stilling basin design modification recommendation is provided.en_US
dc.description.sponsorshipUnited States. Army. Corps of Engineers. Baltimore District.en_US
dc.description.tableofcontentsAbstract .......................................................................................................................................................... ii List of Figures and Tables............................................................................................................................. v Preface ...........................................................................................................................................................vii Unit Conversion Factors ........................................................................................................................... viii 1 Introduction ............................................................................................................................................ 1 1.1 Background .................................................................................................................... 2 1.2 Objective ........................................................................................................................ 3 1.3 Approach ........................................................................................................................ 3 2 Model Description and Modeling Process ....................................................................................... 4 2.1 Foster Joseph Sayers Dam model scale relations ....................................................... 8 2.2 Model description .......................................................................................................... 8 2.2.1 Model description and construction .......................................................................... 8 2.2.2 Elevation markers, point gages, and instrumentation .............................................. 9 3 Model Results ......................................................................................................................................13 3.1 Tests with a fixed bed exit channel ............................................................................. 13 3.1.1 Field discharge tests ................................................................................................. 13 3.1.2 Physical model field discharge test observations ................................................... 15 3.1.3 Summer and winter pool elevation tests observations........................................... 16 3.1.4 Upper approach channel riprap observations ......................................................... 17 3.2 Sayers outlet works riprap design .............................................................................. 18 3.2.1 Upstream riprap protection ...................................................................................... 18 3.2.2 Downstream riprap protection ................................................................................. 19 3.2.3 Riprap for 18 in. thickness ....................................................................................... 19 3.2.4 Riprap for 24 in. thickness ....................................................................................... 19 3.2.5 Riprap for 36 in. blanket thickness .......................................................................... 19 3.2.6 Riprap gradation ....................................................................................................... 20 3.3 Tests with a movable bed exit channel ...................................................................... 22 3.4 Stilling basin modifications ......................................................................................... 30 3.4.1 High-sloping fillet added to basin ............................................................................. 30 3.4.2 Low-sloping fillet added to basin .............................................................................. 31 3.4.3 Inverted V added to parabolic drop .......................................................................... 35 3.4.4 Baffle blocks removed in stilling basin .................................................................... 41 4 Summary and Recommendations ................................................................................................... 43 4.1 Summary of physical model study .............................................................................. 43 4.2 Recommendation ........................................................................................................ 47 References ................................................................................................................................................... 49 Appendix: Testing Notes ............................................................................................................................ 50 Report Documentation Page-
dc.format.extent104 pages / 12.02 Mb-
dc.format.mediumPDF/A-
dc.language.isoen_USen_US
dc.publisherCoastal and Hydraulics Laboratory (U.S.)en_US
dc.publisherEngineer Research and Development Center (U.S.)en_US
dc.relation.ispartofseriesTechnical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/CHL TR-18-18-
dc.rightsApproved for Public Release; Distribution is Unlimited-
dc.sourceThis Digital Resource was created in Microsoft Word and Adobe Acrobat-
dc.subjectConcrete--Deteriorationen_US
dc.subjectFoster Joseph Sayers Dam (Pa.)en_US
dc.subjectHydraulic modelsen_US
dc.subjectHydraulic structureen_US
dc.subjectStilling basinen_US
dc.titlePhysical model analysis of the Foster Joseph Sayers Damen_US
dc.typeReporten_US
Appears in Collections:Technical Report

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