Evaluation Of Bridge Scour Data At Selected Sites In Ohio PDF Download
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Author | : K. S. Jackson |
Publisher | : |
Total Pages | : 102 |
Release | : 1996 |
Genre | : Scour at bridges |
ISBN | : |
Download Evaluation of Bridge-scour Data at Selected Sites in Ohio Book in PDF, ePub and Kindle
Scour data collected during 1989-1994 were evaluated to determine whether pier scour and contraction scour occurred at 22 bridge sites in Ohio. Pier-scour depths computed from selected pier-scour prediction equations were compared with measured pier-scour depths, and the accuracy of the prediction equations were evaluated. Observed pier-scour relations were compared to similar relations developed through laboratory research. Mean streambed elevations were evaluated to determine the depth of contraction scour. Channel stability was assessed by use of mean streambed elevations at the approach section. Ground-penetrating radar was used at all sites to investigate the presence of historical scour.
Author | : K. Scott Jackson |
Publisher | : |
Total Pages | : 0 |
Release | : 1996 |
Genre | : Scour (Hydraulic engineering) |
ISBN | : |
Download Evaluation of Bridge-scour Data at Selected Sites in Ohio Book in PDF, ePub and Kindle
Author | : K. S. Jackson |
Publisher | : |
Total Pages | : 98 |
Release | : 1996 |
Genre | : Scour at bridges |
ISBN | : |
Download Evaluation of Bridge-scour Data at Selected Sites in Ohio Book in PDF, ePub and Kindle
Scour data collected during 1989-1994 were evaluated to determine whether pier scour and contraction scour occurred at 22 bridge sites in Ohio. Pier-scour depths computed from selected pier-scour prediction equations were compared with measured pier-scour depths, and the accuracy of the prediction equations were evaluated. Observed pier-scour relations were compared to similar relations developed through laboratory research. Mean streambed elevations were evaluated to determine the depth of contraction scour. Channel stability was assessed by use of mean streambed elevations at the approach section. Ground-penetrating radar was used at all sites to investigate the presence of historical scour.
Author | : Robert Lyle Miller |
Publisher | : |
Total Pages | : 244 |
Release | : 1996 |
Genre | : Scour at bridges |
ISBN | : |
Download Evaluation of Scour at Selected Bridge Sites in Indiana Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 238 |
Release | : 1997 |
Genre | : Hydrology |
ISBN | : |
Download Water-resources Investigations Report Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 628 |
Release | : 1990 |
Genre | : Stream measurements |
ISBN | : |
Download Water Resources Data Book in PDF, ePub and Kindle
Author | : Ryan L. Fosness |
Publisher | : |
Total Pages | : 260 |
Release | : 2007 |
Genre | : Bridges |
ISBN | : |
Download Evaluation of Similar Methods for Estimating Bridge Scour at Selected Sites in South Dakota Book in PDF, ePub and Kindle
Total estimated bridge scour was estimated at 833 bridges in South Dakota from 2003 to 2006 by the U.S. Geological Survey as required by the U.S. Federal Highway Administration.
Author | : Katherine J. Chase |
Publisher | : |
Total Pages | : 36 |
Release | : 2004 |
Genre | : Bridges |
ISBN | : |
Download Evaluation of Pier-scour Equations for Coarse-bed Streams Book in PDF, ePub and Kindle
Streambed scour at bridge piers is among the leading causes of bridge failure in the United States. Several pier-scour equations have been developed to calculate potential scour depths at existing and proposed bridges. Because many pier-scour equations are based on data from laboratory flumes and from cohesionless silt- and sand-bottomed streams, they tend to overestimate scour for piers in coarse-bed materials. Several equations have been developed to incorporate the mitigating effects of large particle sizes on pier scour, but further investigations are needed to evaluate how accurately pier-scour depths calculated by these equations match measured field data. This report, prepared in cooperation with the Montana Department of Transportation, describes the evaluation of five pier-scour equations for coarse-bed streams. Pier-scour and associated bridge-geometry, bed-material, and streamflow measurement data at bridges over coarse-bed streams in Montana, Alaska, Maryland, Ohio, and Virginia were selected from the Bridge Scour Data Management System. Pier scour calculated using the Simplified Chinese equation, the Froehlich equation, the Froehlich design equation, the HEC-18/Jones equation and the HEC-18/Mueller equation for flood events with approximate recurrence intervals of less than 2 to 100 years were compared to 42 pier-scour measurements. Comparison of results showed that pier-scour depths calculated with the HEC-18/Mueller equation were seldom smaller than measured pier-scour depths. In addition, pier-scour depths calculated using the HEC-18/Mueller equation were closer to measured scour than for the other equations that did not underestimate pier scour. However, more data are needed from coarse-bed streams and from less frequent flood events to further evaluate pier-scour equations.
Author | : |
Publisher | : |
Total Pages | : 92 |
Release | : 1993 |
Genre | : Geological surveys |
ISBN | : |
Download U.S. Geological Survey Open-file Report Book in PDF, ePub and Kindle
Author | : United States. Superintendent of Documents |
Publisher | : |
Total Pages | : 1084 |
Release | : 1993 |
Genre | : Government publications |
ISBN | : |
Download Monthly Catalog of United States Government Publications Book in PDF, ePub and Kindle
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index