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Storda Bru, Hardangerfjord, Norway
Daily concreting enabled six cycles per week
With its length of 1,076 m, the Storda Bru is the second longest suspension bridge in Norway. It is part of a complete construction project that links three islands and their population of 33,000 people in the Hardanger Fjord, not far from Bergen. The eye-catching feature of the construction is two pylons of 94.50 m and 86.50 m in height that were to be formed 667 m apart.
The pylons consist of double box piers that increasingly taper in height towards the top, whilst the opposite side runs straight up with a constant inclination of 2.097° to the vertical. The ends have a uniform taper from an initial width of 5.60 m to 3.50 m at a height of 42.22 m, after which they remain constant.
External formwork:
VARIO girder wall formwork on four ACS climbing units with two brackets each. These were adjusted for the tapering pier sections by cutting back the formwork panels for successive lifts. All lifts could be raised hydraulically together. The large lifting cylinders of the climbing machines provided a smooth operation and with 0.5 m/min, there were fast lifting times.
Internal formwork:
Two-part VARIO on inner platforms with gravity pivot plates. On the two ends the formwork panels were adjusted to the tapering geometry from lifts 1 to 11 by cutting them back. The longitudinal panels only had to be adjusted on one side. Climbing was made with the crane.
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| PERI Systems In Use |
ACS R Self Climbing System
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The convincing formwork concept was also mirrored in the fast construction time. Daily concreting allowed six lifts with a standard height of 4.07 m to be reliably completed each week. |
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