REGIONAL REPORT Ӏ MIDDLE EAST
Innovative installation method provides large time savings in saudi
Certain locations across the Middle East are promoting themselves as luxuary, aspirational destinations. One such development is Shura island in Saudi Arabia. It comprises a hub of islands housing a series of 11 luxury resorts on the Red Sea. The designs were launched by His Royal Highness Prince Mohammed bin Salman, Crown Prince, chairman of The Red Sea Development Company (TRSDC). In order to connect the island to the mainland the Shurayrah Bridge has been built as one of the main access points. Led by the TRSDC, it appointed Archirodon, a marine contracting
specialist, to design it. The bridge will stretch a total of 1.2km. A precast yard for bridge sections has been established near the coast to minimise travel distances with concrete sourced from on-site batching plants. To handle the transportation and installation of 60 pre-cast bridge-beam and edge-beam segments onto piers Archirodon reached out to Netherlands-headquartered heavy lift and transport specialist Mammoet. Having studied the project Mammoet’s engineering team came up with an innovative installation method using it's MTC 15 mobile fl oating crane concept crane positioned on a barge, thereby creating a 500t capacity containerised fl oating sheer leg with an outreach of 30m.
This installation method was designed to provide signifi cant time
savings as it allows the bridge to be built faster by installing one section a day instead of one in two days, and provide more fl exibility and accuracy to the operation. The MTC 15 comes in standard shipping containers and can be assembled and erected in days. Archirodon’s 210-class barge with a suitable deck load was available at the site, this minimised the costs associated with the mobilisation of a new barge and reduced the environmental harm by using readily available local resources. The MTC 15 was shipped to the Port of Yanbu, where it was assembled on the barge and then sailed to the project site in Umluj, where its boom was raised, ready to lift the 400t bridge sections.
At the pre-cast yard Mammoet’s SBL1100 hydraulic gantry, a
four-point lifting system, is lifting sections and safely placing them onto SPMTs for the transport to a new temporary jetty. At the jetty, the MTC-15 crane on the barge lifts the segment from the trailers, placing the segment on the bow while on hook and then fl oats off to the installation area. Once at the location the segment is placed onto bearings on crossheads of piers and the fl oating crane returns for the next section to repeat the process. The MTC 15 has also been constructed by reapplying parts from
previous cranes, reducing its environmental footprint. Using sand or water on-site for ballast reduces environmental impacts further.
26 CRANES TODAY
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