Brunn am Gebirge, Austria
Brunn am Gebirge, Austria

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Hofinger H.,iC consulenten ZT GmbH | Unterberger W.,iC consulenten ZT GmbH | Markiewicz R.,Geotechnik Adam ZT GmbH | Adam D.,Geotechnik Adam ZT GmbH
Geomechanik und Tunnelbau | Year: 2010

The application of geothermal energy has increased in the last couple of years in order to provide the heating or cooling demands of major projects. Open systems using groundwater directly can be used for geothermal energy extraction as well as closed systems with absorber pipes installed in underground structures. An accurate design, which considers the requirements of the energy consumer in particular but also the subsoil and groundwater conditions, the foundation concept and the building structure, as well as project-specific technical, legal and economic conditions, is required for economically efficient application. Diligent supervision is necessary during the construction stage to avoid any damage to absorber pipes, which could result in loss of performance. © 2010 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.


Adam D.,Vienna University of Technology | Adam D.,Geotechnik Adam ZT GmbH | Markiewicz R.,Geotechnik Adam ZT GmbH | Brunner M.,Authority of Lower Austrian Government
Geotechnical and Geological Engineering | Year: 2014

The city bypass tunnel of Waidhofen an der Ybbs (Austria) is situated in an intricate geological-geotechnical complex consisting of soil, hard soil, weak rock and solid rock. Marls and marly limestone (Waidhofener formation) predominate followed by tectonic breccia of the Alpine cliff zone, which is a tectonic melange zone. Materials of this kind universally have isolated interior blocks embedded in a matrix called “block-in-matrix” (see Fig. 1) requiring a particular characterization of the mechanical rock mass properties. The complex geological and morphological situation required the application of various tunneling methods including open cuts, cut-and-cover sections and the New Austrian Tunneling Method. During construction in creeping slopes increased movements were triggered, which required the installation of a sophisticated monitoring system. On the basis of monitoring data and additional ground investigations structural measures were assessed that enabled safe tunneling in the creeping slope.[Figure not available: see fulltext.] © 2011, Springer Science+Business Media Dordrecht.


Adam D.,Vienna University of Technology | Adam D.,Geotechnik Adam ZT GmbH | Markiewicz R.,Geotechnik Adam ZT GmbH
Osterreichische Wasser- und Abfallwirtschaft | Year: 2010

The development of efficient heat pumps has made it possible over the past decades to raise the energy stored in the ground to temperature levels which permit the active heating of buildings. Since the early nineties, novel technologies have helped to integrate absorber systems into building foundations and infrastructure buildings and to develop larger energy potentials at lower cost. These novel absorber technologies are also suited to meet the increasing cooling requirements of modern buildings constructed by recently developed methods. Besides these closed geothermal systems, open systems for the direct utilisation of the groundwater through extraction and re-infiltration are being increasingly used. Sophisticated solutions such as hydraulic and thermal simulations form the basis for the efficient technical design of plant utilising the thermal energy of the ground. © 2010 Springer-Verlag.


Adam D.,Vienna University of Technology | Markiewicz R.,Geotechnik Adam ZT GmbH
Geotechnical Engineering for Infrastructure and Development - Proceedings of the XVI European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2015 | Year: 2015

The construction of the Donau City Tower 1 has been recently accomplished; it is the first of two high-rise buildings in the so called "Donau City" in the north of Vienna. The DC Tower 1 is one of the tallest buildings in Europe and comprises a height of 250 m above ground, 20 m of underground floors, and a 35 m deep foundation. The execution of the deep excavation and the deep foundation of the Donau City Tower 1 made great demands on ground engineering. The geotechnical relevant works contained the construction of the pit supporting system for the excavation pit and deep foundation works for the tower consisting of numerous diaphragm wall elements with depths up to 30 m, and CFA piles for the foundation of shallow building parts. A special challenge was the design and execution of the de- watering scheme to remove the water in the quaternary soil and for lowering the water pressure in the tertiary soil layers. © The authors and ICE Publishing: All rights reserved, 2015.


Adam D.,Vienna University of Technology | Adam D.,Geotechnik Adam ZT GmbH | Brandl H.,Vienna University of Technology | Paulmichl I.,Geotechnik Adam ZT GmbH
International Journal of Pavement Engineering | Year: 2010

The dynamic behaviour of a railway system depends on the interaction of its three subsystems: the vehicles, the rail track and the subsoil. The motion of trains induces various dynamic effects on tracks. Vehicles moving with high speed generate waves, which propagate both to the track and the ground influencing the traction of the train significantly. In order to minimise the mentioned effects, specific designs for rail track systems are required. In this paper, an overview of significant dynamic aspects and rail track models is given. Furthermore, a design model is presented, which allows the determination of the dynamic response in different rail track systems due to a load moving with constant speed. The pavement and the rail are considered as an infinite flexible beam resting on continuous spring-dashpot elements simulating ideal high-speed rail tracks. The solution is found by transfer functions consisting of series approximation. Furthermore, a model is proposed that comprises an additional bedding of continuous springs between the flexible beam and the spring-dashpot elements. Properties of spring-dashpot elements simulating the bedding of the layered subgrade structure are calculated from a dynamic cone model. The results of large-scale in situ tests involving speeds up to 230km/h carried out on high-speed rail tracks are presented. Finally, practical recommendations for the design and construction of the railway track are formed on the basis of the mentioned theoretical investigations, parametric studies, in situ measurements and field observations. © 2010 Taylor & Francis.

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