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Very first Woltman 55VR heads out to its first jobsite
Woltman´s latest addition to its product range: The Woltman 55VR.
Woltman is well known for manufacturing dedicated, compact yet powerful rigs for the foundation industry. Over the years several foundation methods require more and more bearing capacity which means the rigs which install these foundations are also getting larger and heavier. Therefore Woltman has now designed a new rig with increased performance but still compact of size.
New apartment buildings in New Castle built with Woltman 50 PR-FF
In New Castle (Delaware, United States of America) a former brownfield is prepared to be ready for 4 apartment buildings. The former old industrial steel metal foundry had metal debris, wood, old stumps and a thick layer of slag. That’s the reason why the precast piles are fitted with rock shoes. These rock shoes keep the pile driving through rocks, metal or other obstacles. They have a high capacity to withstand compression and lateral stress.
The project consisted of 400 pieces precast piles with a length varying between 25ft and 35ft. For the Woltman 50PR-FF an easy job, taken into account the capacity of this pile driving rig. With the 50PR-FF, a single pile of max. 72ft can be driven. The leader capacity of this 63 tons operational weight rig is a staggering 18.5 ton (pile + hammer). Although 63 tons seems light for a piling rig with a 7 tons hammer, some states/countries may require lighter transport possibilities. Therefore, the hammer as well as the counterweight can be de-assembled. By doing so, the transport weight will be reduced to only 45 tons (metric).
The PVE NL series hydraulic impact hammer line are designed according to a modular set-up. Therefore a 1 or 2 tons extension can be fitted to a PVE 5NL to make it a 6 tons or even 7 tons impact hammer. This makes the contractor flexible when approaching a project. The Woltman 50PR-FF of Sun Piledriving Equipment is fitted with the latest safety and operational features to make pile driving a well monitored and efficient process. Some of these features are Zollern Free fall winches, Caterpillar Tier 4F / Stage 4 engine, motion alarms and enhanced data acquisition (PVE measure strike).
Woltman 90 DR builds foundation for new terminal in San Francisco
Currently, no less than four Woltman 90 DR drilling rigs are working at the airport of San Francisco. In several months, the complete foundation of a new terminal will be built, after that the current terminal will be teared down.
During this impressive project, 1655 piles will be installed, all with a diameter of 18-24’’. The steel casings have a length up to 127 ft. In order to stick to the deadline, pile drivers work in 10 hours shifts from Monday to Friday. Four Woltman 90 DR drilling rigs are equipped with PVE rotary heads, with a special clamping system in order to install the steel casings.
The average number of driven piles per day is 7, as the pile drivers need to in-bed the piles into a rock socket, to guarantee the load capacity of a pile. As data records must be made, the on-board data acquisition system is a very helpful tool.
Apart of the deadline, one of the great challenges of the project is the strict rules due to air traffic and fuel from planes. Foundation Contractors made a tight schedule and they are sure to finish the job within the deadline.