osterberg cell world record loadtest review stgec... · 2017. 1. 25. · osterberg cell...
TRANSCRIPT
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Osterberg Cell World Record Loadtest Review
William F. “Bubba’ Knight, P.E.
Business Development Manager
Senior Engineer
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O Cell Word Record ReviewHistory
O Cell Word Record Review
Location Diameter Depth Maximum LoadOhio River Bridge, Kentucky ( 1992 )
1.8m ( 6 ft. ) 36m ( 117 ft. ) 54 MN ( 6,200 tons )
St. Mary’s River, Georgia (1996 )
1.5m ( 5 ft. ) 23m ( 75 ft. ) 65 MN ( 7,300 tons )
Penang, Malaysia( 1996 )
6x1m barrette 91m ( 300 ft. ) 97 MN ( 11,000 tons )
Apalachicola River, Florida ( 1997 )
2.75m ( 9 ft. ) 39m ( 127 ft. ) 133 MN ( 15,000 tons )
Tucson, Arizona( 2001 )
2.4m ( 7.9 ft. ) 41m ( 135 ft. ) 151 MN ( 17,000 tons )( )
Pomeroy - Mason WV, Ohio River
2.4m (8 ft.) 26m (86ft.) 163 MN (18,400 tons)
Incheon 2nd Crossing Korea (2005)
2.4m – 3.0m (8 ft – 10ft )
67m (220ft.) 279 MN (31,350 tons)Korea (2005) (8 ft. 10ft.)
I-70 Mississippi Bridge, St Louis, Missouri (2010)
3.35m (11ft.) 35m (115ft.) 320 MN (36,000 tons)
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O Cell Word Record ReviewHistory
O Cell Word Record Review
Location Diameter Depth Maximum LoadOhio River Bridge, Kentucky ( 1992 )
1.8m ( 6 ft. ) 36m ( 117 ft. ) 54 MN ( 6,200 tons )
St. Mary’s River, Georgia (1996 )
1.5m ( 5 ft. ) 23m ( 75 ft. ) 65 MN ( 7,300 tons )
Penang, Malaysia( 1996 )
6x1m barrette 91m ( 300 ft. ) 97 MN ( 11,000 tons )
Apalachicola River, Florida ( 1997 )
2.75m ( 9 ft. ) 39m ( 127 ft. ) 133 MN ( 15,000 tons )
Tucson, Arizona( 2001 )
2.4m ( 7.9 ft. ) 41m ( 135 ft. ) 151 MN ( 17,000 tons )( )
Pomeroy - Mason WV, Ohio River
2.4m (8 ft.) 26m (86ft.) 163 MN (18,400 tons)
Incheon 2nd Crossing Korea (2005)
2.4m – 3.0m (8 ft – 10ft )
67m (220ft.) 279 MN (31,350 tons)Korea (2005) (8 ft. 10ft.)
I-70 Mississippi Bridge, St Louis, Missouri (2010)
3.35m (11ft.) 35m (115ft.) 320 MN (36,000 tons)
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O Cell Word Record ReviewHistory
O Cell Word Record Review
Location Diameter Depth Maximum LoadOhio River Bridge, Kentucky ( 1992 )
1.8m ( 6 ft. ) 36m ( 117 ft. ) 54 MN ( 6,200 tons )
St. Mary’s River, Georgia (1996 )
1.5m ( 5 ft. ) 23m ( 75 ft. ) 65 MN ( 7,300 tons )
Penang, Malaysia( 1996 )
6x1m barrette 91m ( 300 ft. ) 97 MN ( 11,000 tons )
Apalachicola River, Florida ( 1997 )
2.75m ( 9 ft. ) 39m ( 127 ft. ) 133 MN ( 15,000 tons )
Tucson, Arizona( 2001 )
2.4m ( 7.9 ft. ) 41m ( 135 ft. ) 151 MN ( 17,000 tons )( )
Pomeroy - Mason WV, Ohio River
2.4m (8 ft.) 26m (86ft.) 163 MN (18,400 tons)
Incheon 2nd Crossing Korea (2005)
2.4m – 3.0m (8 ft – 10ft )
67m (220ft.) 279 MN (31,350 tons)Korea (2005) (8 ft. 10ft.)
I-70 Mississippi Bridge, St Louis, Missouri (2010)
3.35m (11ft.) 35m (115ft.) 320 MN (36,000 tons)
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Incheon 2nd Link, KoreaIncheon 2 Link, Korea
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Incheon 2nd Link, Korea
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Incheon 2nd Link, Korea
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Osterberg Cell Load-Movement Curves
50
60
30
40
m)
10
20
acem
ent
( mm
Upward Top of O-cell
-10
0
Dis
pla
Downward Base of O-cell
-30
-20
-400 20 40 60 80 100 120 140 160
O-cell Gross Load ( MN )
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O Cell Word Record ReviewO Cell Word Record ReviewHistory
Location Diameter Depth Maximum LoadOhio River Bridge, Kentucky ( 1992 )
1.8m ( 6 ft. ) 36m ( 117 ft. ) 54 MN ( 6,200 tons )
St. Mary’s River, Georgia (1996 )
1.5m ( 5 ft. ) 23m ( 75 ft. ) 65 MN ( 7,300 tons )
Penang, Malaysia( 1996 )
6x1m barrette 91m ( 300 ft. ) 97 MN ( 11,000 tons )
Apalachicola River, Florida ( 1997 )
2.75m ( 9 ft. ) 39m ( 127 ft. ) 133 MN ( 15,000 tons )
Tucson, Arizona( 2001 )
2.4m ( 7.9 ft. ) 41m ( 135 ft. ) 151 MN ( 17,000 tons )( )
Pomeroy - Mason WV, Ohio River
2.4m (8 ft.) 26m (86ft.) 163 MN (18,400 tons)
Incheon 2nd Crossing Korea (2005)
2.4m – 3.0m (8 ft – 10ft )
67m (220ft.) 279 MN (31,350 tons)Korea (2005) (8 ft. 10ft.)
I-70 Mississippi Bridge, St Louis, Missouri (2010)
3.35m (11ft.) 35m (115ft.) 320 MN (36,000 tons)
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World Record Load Test in Mississippi River in St. Louis, USA
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World record – Rock socket (320MN)
The rock socket was about 7m (23ft) deep and 3350mm (11ft) in diameter in very hard limestone. Four 870mm (34in) O‐cells placed at the base of the shaft were loaded to 150% of their rated capacity to achieve the record load.
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El 297.76700‐7800 psi
EL 248.711000‐14500 psi
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Shaft Volume Shaft Volume ‐‐ SONISONICALIPERCALIPER
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3715
RATIO OF MEASURED TO ESTIMATED ULTIMATE CAPACITY (M/E Ratio)
30AND MEASURED FACTOR OF SAFETY (ASSUMING DESIGN FS=2)
37
M/E=25Many tests revealed extremely conservative designs that may
result in foundations over 4 time as expensive as necessary
105
10431
1020
expensive as necessary
35 5
M/EFSm
624 657
95 75 109 8840
28
127
128 5
38
10
29665
352
Soft to Hard Soils Intermediate Materials Hard Rock
25 4445
46
9574
123
94
75
25
09 88
89
28
1106
2
29
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C l iConclusions• Foundations capacities underutilized• Unused capacity – lost tax $$$• Contractors recognizing value
• ATC, VE, Design Build• The sooner the better for LT results