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List of products by author: M. Bettelini
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Advances in Optimum Ventilation Control for Road Tunnels
Abstract: Major improvements in road-tunnel safety could be implemented within the first decade of this century. The few years immediately following the large fires in the Mont Blanc (1999), Tauern (1999) and St. Gotthard (2001) mainly focused on technology and organization. New technologies were developed for a rapidly growing market and new equipment was installed. Concurrently, the necessary...
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Best Practices and Perspectives for Cross Connections in Twin-Tube Rail Tunnels
Abstract: Cross connections represent a fundamental safety facility for rail tunnels. The key parameters characterizing cross connections, including maximum distance, minimum dimensions, technical equipment and level of protection, depend on a number of regulations and vary significantly from country to country. For this reason, a research study was initiated by Amberg Engineering Ltd. in cooperation...
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Complex ventilation of the Brenner Base Tunnel during construction
Abstract: The present paper documents design of ventilation and cooling during tunnel construction of the lot H41 Sillschlucht-Pfons of the -66km long Brenner Base Tunnel, between Austria and Italy. Challenging requirements result from the fact that the tunnel connects two countries with different regulations, from the extreme complexity of the construction site and from a number of interactions with...
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Cost-Effective Safety for Road Tunnels
Abstract: Safe design and operation of underground infrastructures at times require a disproportionate amount of resources without a reasonable return in terms of safety. Examples include overly sophisticated design, which results in high maintenance costs and excessive operational complexity, which cannot be adequately managed by the exploitation staff. Conversely, oversimplified design mostly leads to...
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Environmentally Friendly Ventilation of Complex Und erground Infrastructures
Abstract: Ventilation is a primary requirement for all kinds of complex underground facilities, both in normal operating conditions and in case of fire. Experience shows that the environmental footprint of complex ventilation systems can be very large. Different ventilation concepts used for underground facilities can have widely different energy consumptions. The present paper focuses on the importance...
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Fire Safety Strategy in Metro Projects The Case of the "Metro Bucharest Line 4 Extension" Project
Abstract: In the feasibility study and preliminary design of a metro project, the safety concept represents an essential technical and financial issue that drives some of the main design choices. From the beginning on, a high-level fire safety strategy has to be developed. This allows identifying potentially critical elements, from a constructive and operational point of view, to be considered during...
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High-Speed Rail-Tunnel Aerodynamics - Advances and Issues
Abstract: The very rapid worldwide development of high-speed rail transportation focused attention on an entirely new set of aerodynamic issues, which were not relevant for conventional rail transportation. The most prominent are: Passenger health and comfort issues result from large pressure fluctuations generated in particular while entering tunnels and in case of trains crossing. Comfort issues arise...
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On the Safety Requirements for Persons with Disabilities in Underground Infrastructures
Abstract: The 2008 United Nation’s “Convention on the Rights of Persons with Disabilities” states the fundamental rights of persons with disabilities, including “long-term physical, mental, intellectual or sensory impairments”. One of the fundamental requirements to States Parties is the “the identification and elimination of obstacles and barriers to accessibility”, including “buildings, roads,...
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Strategic Underground Space and Cavern Development
Abstract: The use of underground spaces is becoming increasingly interesting, as surface space in cities becomes sparse and precious. Climate change increases the need for cities to protect themselves from flooding, major storms etc. Underground spaces can make cities more resilient to master these disasters and to keep functioning, by hosting vital services, like power distribution, fresh-water supply...
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Towards Optimum Control and Operation of Tunnel Ven tilation Systems
Abstract: Ventilation design for normal and emergency conditions is frequently carried out based on purely steady-state considerations. While this is allowable to some extent in comparatively simple cases, there are situations, where this approach completely fails. In such situations both ventilation and ventilation-control design must take dynamic effects into account. This is particularly important for...
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Ventilation of Rail Tunnels – State-of-the-Art and Trends
Abstract: New rail tunnels are very frequently equipped with emergency ventilation systems, while the vast majority of existing tunnels are still naturally ventilated. This paper reviews the technical and historical reasons, which led to this situation and illustrates the major issues to be accounted for while assessing the need for a ventilation system for a rail tunnel. The main requirements to be...
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