Numerical Modeling of Scour at Bridge Foundations on Rock
The present paper presents an application of the Comprehensive Scour Model (CSM) to quarrying and plucking of fractured rock at bridge piers. Numerical modeling of rock block plucking has been performed within the framework of the National Cooperative Highway Research Program Project NCHRP -24-29. A two-phase transient numerical model simulates the potential movements of the block as a function of flow turbulence and stream power in the scour hole around the bridge pier. The hydraulic action on the rock blocks is automatically adapted during formation and growth of the scour hole. Both the ultimate scour depth and the scour threshold flow velocity are determined as a function of the shape, dimensions and protrusion of the rock block, of the average upstream river bed slope and of the angle of the rock joints. The numerical model points out the influence of turbulent eddies and block protrusion on rock block uplift.
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Availability:
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Supplemental Notes:
- © 2010 American Society of Civil Engineers.
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Corporate Authors:
American Society of Civil Engineers
1801 Alexander Bell Drive
Reston, VA United States 20191-4400 -
Authors:
- Bollaert, E F R
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Conference:
- International Conference on Scour and Erosion (ICSE-5) 2010
- Location: San Francisco California, United States
- Date: 2010-11-7 to 2010-11-10
- Publication Date: 2010
Language
- English
Media Info
- Media Type: Web
- Pagination: pp 767-776
- Monograph Title: Scour and Erosion
Subject/Index Terms
- TRT Terms: Bridge foundations; Bridge piers; Eddies; Scour
- Identifier Terms: National Cooperative Highway Research Program
- Subject Areas: Bridges and other structures; Highways; Hydraulics and Hydrology;
Filing Info
- Accession Number: 01940147
- Record Type: Publication
- ISBN: 9780784411476
- Files: TRIS, ASCE
- Created Date: Dec 17 2024 5:09PM