Vsl International Ag

Max Ernst Meyer

Jean Marie Laurens

Walter Althaus

Ferry Effendi

Guy Russell

Nugroho Budi Juliadi

Româo Almeida

Pascal Burtet

A crane apparatus and method are described for lifting a heavy load such as a wind-turbine generator uniton to a wind-turbine tower. The crane is designed to climb up cablesattached to the top of the tower, carrying with it the cablesand lifting gearwhich will be required for the main lifting operation. The crane comprises a pair of jib-frameswith boom armswhich can be retracted during lifting and then deployed to a pivotable, loadbearing position once the crane is mounted at the top of the tower. Hydraulic strand jacksand heavy-duty strandsare preferably used for the heavy lifting. In a preparation step, a load-bearing bracket assembly, to which the jib-frameswill be secured, is hoisted up and fitted to the top of the tower. Once the lifting operations are complete, the crane assembly and the bracket assemblyare lowered from the towerand removed from site.

Heavy lifting apparatus and method

A method of constructing a tower structure by assembling a set of coaxial telescopic sectionsin position on site and then raising the assembled sections using hydraulic crawler jacksand tendons. The telescopic sections are assembled or constructed in situ, starting with the inner section and then each subsequent section around the outside of the previously constructed sections. Each individual tower section may be cast in situ or assembled from multiple pre-fabricated segments. This method permits the construction of very tall structures while obviating the need for very large cranes. It also removes the design constraints on the height of the individual telescopic sections.

Telescopic tower assembly and method

An apparatus and method are proposed for incremental casting of concrete cantilever bridge sections. The main trusses which form the load-bearing frames of the apparatus are angularly splayed so that they are positioned outwards of the main load bearing webs of the to-be-constructed section of the bridge, while still being supported on the webs of the already-constructed section of the bridge. In this way, the region above and below the construction space is kept free for improved access.

Overhead form traveller and method

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Singapore, Singapore

Max Ernst Meyer