Power and industrial projects can benefit greatly from the use of modular construction techniques.
Maximizing offsite pre-assembly allows the foundations to be installed
in parallel with the structure and many elements of the structure to be
assembled offsite at the same time. The techniques of transporting and
erecting large/heavy sub assemblies are key to the success of these projects.
Recent examples of projects carried out using DLT supplied equipment include ……….
In 2012 DLT supplied a 540 tonne capacity modular gantry for installation of generators to Lift & Shift India. The gantry is modular to accommodate the geometry of each site and incorporates folding strand jacks to allow the generator and strand jack carriage to move together into the turbine hall without the need to remove a section of the overhead crane rail to provide extra headroom. The gantry is able to lift, rotate and move the generator into final position and incorporates both transverse and longitudinal movement systems to allow the generator to be set accurately onto its foundations. More>
In 2010 DLT supplied a 370 tonne capacity strand jack lifting system to BHEL Western Division in India for use in the construction of power stations. The system comprises 2 No DL-S185 strand jacks powered by 2 No DL-L40/1/300/E electrically powered hydraulic power packs for a lifting speed of 20 m/hr and controlled using our DL-M2 pendant control system. The first steam drum was lifted in November 2010. More>>
Steam generator replacement, USA >>
In November 2010 Rigging International used 2 No DL-S418 strand jacks to replace a steam generator in the SONGS nuclear power plant in California. The lifting system comprised 2 No DL-S418 strand jacks powered by 1 No DL-L60/4/300/D diesel powered hydraulic power pack for a lifting speed of 14 m/hr and controlled using our DL-P40 computer control system. The operation took place adjacent to a live nuclear reactor in an environment with very high electrical magnetic interference. Our DL-P40 computer control system was approved for use in this environment following a successful 24 hour continuous running test on the site.
DLT were sub-contractors for installation of a new 40.75m high 3115 tonne furnace line in Taiwan. Our scope included full engineering of all temporary works required together with supply of jacking equipment and site labour to carry out the work. The blast furnace was delivered to the site in 8 segments, weighing up to 477 tonnes each, which were lifted and skidded into the furnace house before being jacked vertically and aligned for welding. These operations were carried out using a mix of strand jacks and climbing jacks. More>
BARD Offshore 1 wind farm. Transformer platform self-installation system >>
The BARD 1 wind farm is located in the North Sea and has a total of 80 wind turbines producing up to 400 MW which is connected into the german extra-high-voltage grid via a 125km long submarine cable. DLT supplied and operated a 16 x DL-S588 computer controlled strand jack system for the self-installation of the central transformer and accommodation platform. The strand jack system was used to suspend the 3,500 tonne jacket from the floating platform during sea transport, then to lower the jacket down onto the sea bed, and finally to lift the 3,320 tonne platform up out of the sea into final operating position where it was then structurally connected to the jacket. More>>
DLT have provided strand jack systems and site supervision to Rigging International for lifting and installation of a number of steam drums weighing up to 380 te and lifted up to 65 m. The strand jack system supplied comprises 2 No DL-S418 strand jacks and a DL-L60F/4/350/D diesel powered hydraulic power pack, with a combined lifting capacity of 836 tonnes and a lift speed of 15 m/hour
DLT were employed by Odebrecht to supply equipment and site supervision to install a water distribution pipe which was required to pass over one of Dominican's many mountains. DLT's equipment and supervisors assisted in the installation of the pipe, pulling a total of 78 sections, from 10 different locations using DLT strand jacks. The maximum pull was 132 tonnes, and the longest pull 157m. More>
DLT were responsible for the design, supply and operation of a system to lift, skid, rotate and lower into final position of a 350 tonne generator. The generator was delivered outside the building and was lifted off the transporter using 4 No DL-S105 strand jacks mounted on a purpose made transportation frame, which sat on a skid track running into the building. Once in the building the generator was rotated 90 degrees on a purpose made turntable and skidded a further 10m before being lowered into final position.
DLT were responsible fore the design, supply and operation of a 60 tonne capacity gantry to replace 2 No 60 tonne heat exchangers from deep within a steel framed structure on PT Peni’s site in Indonesia. Use of these purpose designed gantries in place of conventional cranage avoided the need to extensively dismantle the steel structure to gain access to the vessels, saving time and money.