ETL 1110-2-563
30 Sep 04
This distribution for mass is shown in Figure C-7. A summary of the statistical parameters used for the
barge impact design of the upper river guide wall is shown in Table C-1.
Figure C-7. Probability distribution of tow mass for Olmsted upper river approach wall (data taken
from Lock 52, located 40 km (25 miles) upstream)
Table C-1
Lognormal Distribution Parameters for Impact Variables, Olmsted Upper River Wall
Approach Wall
Design Structure
Variable
Mean
Standard Deviation
Minimum
Maximum
θ, deg
Upper river guide wall
3.3
2.2
0
17
V0x , ft/sec
1.27
0.62
0
4.8
V0y , ft/sec
0.07
0.092
0
1
b. Winfield Upper Approach Guard Wall, Kanawha River, Winfield, West Virginia (Design Memo-
randum, Winfield Lock and Dam, Huntington District, 1995). The Huntington District completed con-
struction of a new main lock chamber and upper approach guard wall at Winfield Locks in 1997. The new
main lock is 34 m (110 ft) wide by 244 m (800 ft) long. During the construction contract for the new lock,
the contractor prepared a Value Engineering proposal to reduce the number of sheet-pile cells for the
upper approach wall. This made the precast beams that spanned between sheet-pile cells approximately
three times longer than the original contract plans had designed and new barge impact analysis for the
walls was required. The barge impact design of the approach walls followed the method described in
ETL 1110-2-338. The Winfield site is located on the inside of a tight bend in the Kanawha River; thus the
approach angles for the upper guide wall can be expected to have a fairly wide variation. The approach
C-5
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