The upstream channel width = 322 ft; depth = 8.6 ft. The discharge is 27,300 cfs and is all contained within the channel. Channel slope = 0.004 (ft/ft) The bridge abutments consist of vertical walls with wing walls, width = 122 ft ; with 3 sets of piers consisting of 3 columns 15 inches in diameter The bed material size: from 0 to 3 ft the D50 is 0.0010 ft and below 3 ft the D50 is 0.0023 ft with a fall velocity of 0.33 ft/sec. Original depth at bridge is estimated as 7.1 ft Determine: The magnitude of the contraction scour depth.
The upstream channel width = 322 ft; depth = 8.6 ft. The discharge is 27,300 cfs and is all contained within the channel. Channel slope = 0.004 (ft/ft) The bridge abutments consist of vertical walls with wing walls, width = 122 ft ; with 3 sets of piers consisting of 3 columns 15 inches in diameter The bed material size: from 0 to 3 ft the D50 is 0.0010 ft and below 3 ft the D50 is 0.0023 ft with a fall velocity of 0.33 ft/sec. Original depth at bridge is estimated as 7.1 ft Determine: The magnitude of the contraction scour depth.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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The upstream channel width = 322 ft; depth = 8.6 ft. The discharge is 27,300 cfs and is all contained within the channel. Channel slope = 0.004 (ft/ft) The bridge abutments consist of vertical walls with wing walls, width = 122 ft ; with 3 sets of piers consisting of 3 columns 15 inches in diameter The bed material size: from 0 to 3 ft the D50 is 0.0010 ft and below 3 ft the D50 is 0.0023 ft with a fall velocity of 0.33 ft/sec. Original depth at bridge is estimated as 7.1 ft Determine: The magnitude of the contraction scour depth.
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