Verwendung von Tunnelausbruchmaterial – Entscheidungsgrundlagen
Research output: Thesis › Doctoral Thesis
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 resources 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 resources. The method of excavation has also a significant influence on the usability of the material. Considering the excavated material, there are differences in the product from TBM and NATM tunnels regarding grading distribution, grain shape and chemical properties. Therefore chemical examinations of excavation material were evaluated on various tunnel projects. The amount and timing of the resulting excavated material are substantially dependent on the tunnelling method too. The different advance rates mean that any intermediate stockpiles and processing plants have to be sized accordingly. To estimate the accumulating material and the material needs a calculation program was developed. The program enables also the implementation of variational studies. Furthermore, a recommendation was made which material tests should be carried out. In the following, the determined material parameters represent the basic input data of an evaluation matrix. The implementation of this evaluation matrix allows comparing technical, chemical and mineralogical properties of the excavated material with specified limit material values.
|Translated title of the contribution||Use of tunnel excavation material - boundary conditions|
|Publication status||Published - 2012|