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Ventilation of tunnels and cross-passages of the Ceneri Base Tunnel and similar projects
Published in Daniele Peila, Giulia Viggiani, Tarcisio Celestino, Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art, 2020
Figure 6 presents concepts with ventilation shaft/adits (central ventilation): Central ventilation by mid-tunnel ventilation shaft (passive, without mechanical ventilation)Central ventilation by mid-tunnel ventilation shaft (active)Central ventilation by several ventilation shafts along the tunnel (active)Central ventilation by mid-tunnel ventilation shaft with railway tunnel doors (active)
Brenner Base Tunnel, Lots Mules, 2–3 (Italy): The emergency stop in Trens
Published in Daniele Peila, Giulia Viggiani, Tarcisio Celestino, Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art, 2020
D. Merlini, M. Falanesca, D. Stocker, A. Voza
The Brenner Base Tunnel (BBT) is the high-speed rail link between Italy and Austria that underpass the Alps along the new European railway corridor called Scandinavian-Mediterranean (Bergmeister, 2015; Eckbauer et al, 2014). With its length of more than 55 km (64 km including all existing tunnel connections) this tunnel system will be amongst the world’s longest traffic tunnels. The BBT project includes two twin single track tunnels (excavation diameter ranges from 9.7 to 10.8 m) and a service tunnel (excavation diameter ranges from 6.3 to 6.6 m) placed 12m below the main tunnels that is designed mainly to reduce the risk during construction, thus optimizing construction logistics, costs and scheduling. For operational and safety reasons, the main tunnels, spaced from 40 to 70 m, are connected every 333 m with bypasses. These distance were established, after detailed studies, to reduce the mutual interference. The tunnel system includes also 3 underground multifunctional stations and a connection tunnel with the Innsbruck existing underground. Cavern for ventilation plant and logistic, ventilation shaft, safety and service tunnels, complete the tunnel system. A general overview of the BBT global system is shown in Figure 1. The maximum cover is about 1800 m. The average overburden along the emergency stop of Trens is about 1100 m.
Ventilation of tunnels and cross-passages of the Ceneri Base Tunnel and similar projects
Published in Daniele Peila, Giulia Viggiani, Tarcisio Celestino, Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art, 2019
Figure 6 presents concepts with ventilation shaft/adits (central ventilation): Central ventilation by mid-tunnel ventilation shaft (passive, without mechanical ventilation)Central ventilation by mid-tunnel ventilation shaft (active)Central ventilation by several ventilation shafts along the tunnel (active)Central ventilation by mid-tunnel ventilation shaft with railway tunnel doors (active)
Challenges in the low-carbon adaptation of China’s apartment towers
Published in Building Research & Information, 2018
C. Alan Short, Jiyun Song, Laetitia Mottet, Shuqin Chen, Jindong Wu, Jian Ge
A ventilation shaft (or chimney) consists of a vertical space used to create a passage for encouraging vertical air circulation (Chiu & Etheridge, 2007; Lomas, 2007; Prajongsan & Sharples, 2012; Priyadarsini, Cheong, & Wong, 2004; Short, Lomas, et al., 2012; Short, Yao, Luo, & Li, 2012; Yang et al., 2014). The stack can be active (with a fan at the top, for example) or passive (Priyadarsini et al., 2004) for buildings where only single-sided ventilation could otherwise be performed. Judiciously applied, this system permits the occupant to be more comfortable during warm summer conditions (Prajongsan & Sharples, 2012; Yang et al., 2014), reducing AC energy consumption (Prajongsan & Sharples, 2012). The efficiency of the stack is affected by the area of the openings (Priyadarsini et al., 2004) and the height of the stack (Lomas, 2007). A promising stack ventilated hybrid scheme in Beijing is reported by Essah et al. (2017) in which mechanical heating and cooling is employed for half the year, the mid-seasons being free running, saving some 50% of energy consumption.