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Layher – Allround in Industrial Construction
The trade with waste booms. While in the past piles of waste were a fear topic, the waste industry has changed considerably since beginning of the 90s. Today it is an efficient total system and contributes to the climate protection with measures like a more effective energetic waste utilization. Part of this is the thermal processing of waste. Burning waste and using the energy set free during this process is one of the components of a modern and sustainable waste industry. This highly developed technology is also being used in Luxembourg. There the administration union SIDOR has been „recycling“ since 1975 approximately 70 percent of the waste in the only waste incineration plant of the country, the waste incineration plant Leudelange.
In Leudelange E.ON Energy from Waste (EEW) is constructing for approximately 80 million Euro a made-to-measure waste-to-energy plant including modern incineration technology and technology for purification of waste gases. The new construction project commissioned by SIDOR comes with an boiler line with approved grate firing technique and after its launch shall replace the three meanwhile outdated boiler lines of the existing plant. During the construction of the overhanging upper floor with wall heights of 16 metres the shear walls and concrete ceilings required a supporting construction with a load bearing capacity of 30 tons – a new challenge for the company Spanier & Wiedemann SARL from Wasserbillig.
For such tasks Layher has developed on the basis of their Allround Scaffolding a heavy-duty support which is able to withstand these extreme loads. Four Allround standards are bundled by means of a twin wedge coupler and thus combined to one ultra-strong support. A single one of these components will bear up to 21.6 tons; a tower of four of these heavy duty columns even up to 69.4 tons. A quite efficient solution, as by using standard components the system is not only very variable, but also economical. Heavy duty towers were set up in a row for the L-shaped shear walls with varying wall thickness: for the shear walls with a thickness of 40 centimetres the bay length was 1.09 x 1.09 metres, for the shear walls with a thickness of 50 centimetres the bay length was reduced to 0.73 x 1.09 metres. Due to the heavy loads, these approximately 20 metres high supporting towers received a foundation of their own. After that the scaffolders expanded the construction supporting the ceiling to an attached spatial structure by using further Allround standard components.
“We normally use the Allround Scaffolding, as this guarantees a high degree of flexibility. The supporting scaffolding in Leudelange was the biggest project ever of this kind for us. With the heavy-duty support we were able easily to absorb the heavy loads and using Allround standard material proved to be highly efficient”, explains scaffolder Jeannette Spanier. Moreover the logistical aspect and the timing of the project were rather exciting: The time schedule provided only a narrow time slot for the assembly of the 5,200 cubic metres large supporting scaffolding – furthermore there were no on-site storing facilities for the scaffolding material. The Layher trucks supplied the new material just in time from Eibensbach to Leudelange, where eight employees of Spanier & Wiedemann worked in spite of ice and snow in day and night shifts in order to complete the scaffolding construction in time within six days.
The support scaffolding for the new construction stood for approximately two months. The waste incineration plant is scheduled to be completed and, after a test run, will finally become operative by end of 2010. From then on it will, according to EEW, permit the thermal processing of more than 150,000 tons of waste per year, whereas the thermal energy gained is transformed into electricity in a power-heat-coupling. 100.000 MWh electricity per year and up to 18 MW long-distance heating can thus be generated. Eco-friendly, as the planned facility allegedly produces no waste water and considerably undercuts the legal emission requirements, e. g. thanks to a multi-level flue gas cleaning. Thus the eco-friendly disposal of residual waste from the 36 southern and central communities of the grand duchy are secured in the long run.
In charge of PR enquiries or contacts with the press:
Ms. Andrea Beisswenger
E-Mail Andrea.Beisswenger@layher.com
Telephone +49 71 35 / 70-0
Fax +49 71 35 / 7070-422
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