RMD Kwikform Korea won a number of contracts for the 450km FSM Seoul-to-Pusan elevated High-Speed Rail Link project in the south of the Korean Peninsular. Around 60 percent of the Link is elevated, and much of RMD Kwikform's work is associated with the design and supply of formwork for the elevated deck. On average, this is around 15 metres above ground level and consists of concrete box sections, which span between 25 metres and 40 metres, that are poured in-situ on top of piers.
The project is making extensive and innovative use of a number of RMD Kwikform's systems including the 1000kN high load capacity Megashor support system, Superslim Soldiers, Alform Beams and Rapidshor modular shoring.
For several applications, Megashor and H-beams are combined to provide the solution, while elsewhere Megashor is being used to support specially-designed steel trusses. These are used where it is essential to achieve longer spans, or where it is necessary to span over roads or other obstructions, without the need for central supporting towers, and while ensuring the minimum disturbance to traffic flows. The H33 beams and the trusses support RMD Kwikform Alform beams that, in turn, support plywood decking.
In-situ load testing of the RMD Kwikform trusses showed a deflection of less than 15mm over a clear span of more than 40 metres. In many instances they also proved to be more cost effective than H-beam solutions due to their lightness and ease of transportation and installation.
Formwork for the box sections of the elevated highway deck is made up of RMD Superslim Soldiers and Alform beams with internal Rapidshor falsework to support the upper deck. The contracts have also called for the design of a number of special components.