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Slide 79
Ice Test by Hydro Quebec IREQ Institute
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2010 Tests
1300 lbs concrete
2 ice blocks
2/10 x 21 inch
Drag distance
6.5 ft / block
Effective Pressure
83,500 lbf/ ft2
Slide 82
Trial 1 – 40-50°F
20 cycles
No damage
Small depression°
Trial 2 – 40-50°F
With sand
10 cycles
No damage
Small scratches°
Trial 3 – 5°F
20 cycles
No damage
Small depression°
Slide 83
Special geomembrane formulation for cold weather
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UPPER BLUE DAM
•Country: United States (Colorado)
•Elevation at crest: 11,742 feet
•Latitude: 39°N
•Dam height: 72 feet
•Type of face: bituminious concrete
•Geocomposite installation completed 2007
•Surface of upstream face: 71,350 sq. feet
•Installation time: 2 months
•Construction of a new plinth: no
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Upper Blue face condition
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First, install tensioning profiles to hold geocomposite
against wind force
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Second, install thick geotextile cushioning layer over rough spots
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Third , install the top seal with geocomposite
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Fourth in rough areas install geogrid to bridge depressions of face.
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Fifth, install thick geotextile over the geogrid
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Sixth, install the PVC geocomposite
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Seven, weld geocomposite sheets (2.1 m wide) together
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Eight, install the top tensioning profile
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Membrane installed but not tensioned on left, on right after tensioning profile installed
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Ninth , install cap strip over tensioning profile
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Tenth, remove the asphalt to expose concrete plinth