Regenerative Energie
Currently, a large number of tunnel projects are being designed or built in Austria. This will create large quantities of excavation material, which so far have been generally used for filling or tipping.
The use of excavation material can save resources of mineral raw materials and also reduces the negative impact of a tunnel construction site on the environment, for example through the reduction of transport distances and required areas for landfill.
The use of excavation material depends greatly on the rock properties and the demand for mineral raw materials.
The method of excavation has also a significant effect on the usability of the material. Con-sidering the excavated material, there are differences in the product from TBM and NATM tun-nels regarding grading distribution, grain shape and chemical properties.
The amount and timing of the resulting excavated material are also dependent on the tunnel-ing method. The different advance rates mean that any intermediate stockpiles and processing plants have to be sized accordingly.
Tunnel spoil material is mentioned explicitly for the first time in the BAWP 2011. According to this, it can be used underground as fill or recycled as a construction material.
The relevant guidelines of the construction materials recycling association can be applied for the implementation of the processing. In the medium term, however, it must be the aim that tun-nel spoil material is not simply used as a recycling material but is equivalent to a primary raw material.
| Copyright: | © Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben |
| Quelle: | Depotech 2012 (November 2012) |
| Seiten: | 6 |
| Preis: | € 3,00 |
| Autor: | D. Resch Univ.-Prof. Dipl.-Ing. Dr.mont. Robert Galler |
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