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Description of a very high speed transit (VHST) system operating in its own rarefied atmosphere in evacuated tubes in underground tunnels. Most cases considered took less time to go coast-to-coast (e.g., 21 min) than it takes an aircraft to climb to an efficient operating altitude.
- The Very High Speed Transit System - RAND Corporation
The Very High Speed Transit System. Author. Robert M. Salter...
- The Very High Speed Transit System - RAND Corporation
The Very High Speed Transit System. Author. Robert M. Salter . Subject. Description of a very high speed transit (VHST) system operating in its own rarefied atmosphere in evacuated tubes in underground tunnels.
- 806KB
- Robert M. Salter
- 20
- 1972
Describes a subway concept called "Planetran" comprising electromagnetically supported and propelled cars traveling in underground evacuated tubes, able to cross the United States in one hour. It is designed to interface with local transit systems, and the tunnel complex also contains utility transmission and auxiliary freight-carrying systems ...
- Robert M. Salter
- Paperback
- 1978
Tunnelling and Underground Space Technology incorporating Trenchless Technology Research is an international journal which publishes authoritative articles encompassing original research and case studies on the development of tunnelling technology, the use of underground space, underground …
23 août 2023 · This article explores three key steps in the much-needed shift toward a more operational and strategic approach to subterranean threats: more accurate risk assessments of underground threats, an understanding of how tunnels bear on the broader mission, and a genuine effort at anticipating innovative uses of tunnel warfare at the hands of states ...
Il y a 1 jour · The development of underground space in megacities has significantly increased with continued population growth and land scarcity. Advanced methodologies and technologies are needed for future tunnelling and underground construction, especially under soft and difficult ground conditions. This special issue will offer a platform for researchers and practitioners to report and discuss the latest ...
1 juin 2024 · A comprehensive framework for analysing embodied carbon in TBM tunnelling. •. Evaluate module-based carbon outputs with functional units via BIM-driven platform. •. Baseline surveys for segmental lining designs and carbon reduction strategies. •. Establish correlations between geotechnical parameters and TBM carbon emissions. •.
