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Geo Geum Bridges, Nokdong, South Korea
Climbing technology for (two) cable-stayed
bridges with four pylons
Two cable-stayed bridges now connect the island of Geo Geum to the mainland - via Sorok Island - in the south-eastern part of Korea. All four bridge pylons are diamondshaped – something seen for the fi rst time in Korea. For the erection of the pylons for both bridge constructions, PERI climbing technology provided the most cost-effective solution. Due to the off-shore location, very high wind loads (typhoon region) along with limited storage and assembly areas had to be taken into consideration in addition to the concreting loads.
The 2,028 m long Geo Geum II Bridge connects the islands of Sorok and Geo Geum. In weekly cycles, the 168 metre high pylons were quickly and effi ciently constructed using ACS self-climbing formwork with concreting cycle heights of four metres. The climbing units allowed the contractors to easily adapt the formwork to suit the variable cross-sections, with wall thicknesses between 1.25 and 1.60 metres, without the need of any time-consuming assembly work.
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| PERI Systems In Use |
VARIO GT 24 Column formwork
ACS R Self Climbing System
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Kang Eung Beom
Site Manager Geo Geum II, Hyundai
“Due to the special form of the pylons, the ACS self-climbing formwork was our only alternative. Thus, the inclined structures could be safely built without any problems, as well as resulting in over a 30% saving in labour costs. The support provided by PERI was also excellent. For me, PERI ACS is the most reliable selfclimbing system available anywhere.”
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Already in a first construction phase, two pylons were erected for the Geo Geum I Bridge (also known as the Sorok Bridge), each with a height of 88 m. The 1,160 m long structure elegantly closed the gap between the small island of Sorok and the mainland, just north of the town of Nokdong. The climbing formwork solution consisted of a cost-effective combination of crane and self-climbing technology with the VARIO GT 24 girder wall formwork system.
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| Geo Geum II: |
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| Contractors: |
Hyundai Engineering & Construction Co., Seoul (Main Contractor) VSL, Seoul (Sub-Contractor) |
| Projektbetreuung: |
PERI Seoul, Korea |
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Field Service:
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PERI (Korea) Ltd., Korea
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