We travel so many roads every day. Even an ordinary road we use every day is equipped with so many technologies facilitating our quick and convenient travel. Hyundai E&C has built a transport infrastructure that is closely connected to our lives, paving new roads and expanding their roles through cutting-edge technology. Here is a closer look at Hyundai E&C’s proprietary technology that extends beyond Korea to the world.
■ Construction Equipment Long Span Cable-Stayed Bridge
[ Ulsan Bridge ]
[ Bosphorus Bridge(Turkey) ]
Hyundai E&C has developed and utilized Prefabricated Parallel Wire Strand(PPWS) cables and equipment to build the main cable of long span suspension bridges. This is a method of improving the conventional Air Spinning (AS) method of constructing and tying steel wires one by one at the stie. A certain number of steel wires are pre-tied in a hexagonal shape in a factory to form a strand, and the main cable is completed by assembling them on the spot, making it easy to manage quality, build, and be less affected by the climate environment.
Applied site | Ulsan Bridge, Bosphorus Bridge(Turkey), Chacao Bridge (Chile)
■ Cast-in-situ Concrete Box Girder
[ Hwamyeong Bridge ]
It is a method of continuously completing the bridge deck by making concrete boxes one by one using foam supported by Form Traveler at the site and installing cables. It is mainly applied to concrete cable-stayed bridges.
Applied site | Godeok Bridge, Hwamyeong Bridge, and Hwayang Bridge
■ Full Span Launching Method(FSLM)
[ Jaber Causeway(Kuwait) ]
It is a method in which the entire upper structure corresponding to one span (distance between piers) is manufactured in advance at the manufacturing site, then moved to the installation location and mounted at once. To move to the location, specially manufactured mechanical equipment such as a huge floating crane or a launching gantry is used. It is also called the Precast Span Method (PSM) and can be applied to long bridges such as railway bridges and sea bridges to shorten the construction period.
Applied site | Gyeongbu high-speed railway, Jaber Causeway(Kuwait)
■ Steel Caisson Tube Cofferdam (CT Method)
[ Guri Amsa Bridge ]
It is one of the coffer dam construction methods that provides dry work space when underwater construction such as the bridge foundation is carried out. The rubber tube installed in the steel caisson is adhered to the underwater structure, and the rubber packing material is pressed against the leveling concrete constructed at the bottom of the underwater to block external inflow of water. It also helps to minimize underwater pollution.
Applied site | Guri Amsa Bridge