Countermeasures to Protect Bridge Piers from Scour

Parker, Gary
Toro-Escobar, Carlos
Voigt, Richard L. Jr.
1998-12
Thumbnail Image

View/Download File

pr433.2.pdf (79.73 MB)

Persistent link to this item

https://hdl.handle.net/11299/112993
Statistics
View Statistics

Journal Title

Journal ISSN

Volume Title

Title

Countermeasures to Protect Bridge Piers from Scour

Authors

Published Date

1998-12

Publisher

St. Anthony Falls Laboratory

Type

Report

Abstract

This report is in fulfillment of NCHRP Project 24-7, Countermeasures to Protect Bridge Piers from Scour. The focus of the report concerns alternatives to standard riprap installations as pier scour countermeasures. Two kinds of countermeasures were examined: flow altering countermeasures such as sacrificial piles and armoring countenneasures such as mattresses of cable tied blocks. None of the flow altering countenneasures were found to be overly effective. Under flood conditions in sand bed streams, riprap placed in the absence of a geotextile or granular filter layer was found to gradually settle and lose effectiveness over time even under conditions for which the riprap is never directly mobilized by the flow. This settling is due to defonnation and leaching of sand associated with the passage of bedforms. Riprap performance can be considerably improved with the use of a geotextile, especially if the geotextile is sealed to the pier. Another countenneasure that provides excellent protection is a mattress of cable tied blocks underlain by a geotextile tied to the pier. Design suggestions are provided for a number of annoring countermeasures.

Keywords

Description

Related to

Replaces

License

Collections

Project Reports

Series/Report Number

Project Reports
 433.2

Funding information

University of Auckland; Nanyang Technological University; University of Louisville

Isbn identifier

Doi identifier

Previously Published Citation

Suggested citation

Parker, Gary; Toro-Escobar, Carlos; Voigt, Richard L. Jr.. (1998). Countermeasures to Protect Bridge Piers from Scour. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/112993.

Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.