A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Underground tunnels for transport systems
In densely populated regions, tunnels below the earth's surface may be attractive guideways for high-speed transportation systems, but the principal deterrent is construction costs. These are beeing reduced by mechanized tunnelling machines but strong rock still requires expensive drill and blast techniques. Research to rapidly weaken hard rock, so mechanical moles can tunnel it economically, is beeing done. A 100-watt continous-duty co-2 laser can reduce the strength of marble or granite by a factor of ten in 3 to 5 seconds exposure time.
Underground tunnels for transport systems
In densely populated regions, tunnels below the earth's surface may be attractive guideways for high-speed transportation systems, but the principal deterrent is construction costs. These are beeing reduced by mechanized tunnelling machines but strong rock still requires expensive drill and blast techniques. Research to rapidly weaken hard rock, so mechanical moles can tunnel it economically, is beeing done. A 100-watt continous-duty co-2 laser can reduce the strength of marble or granite by a factor of ten in 3 to 5 seconds exposure time.
Underground tunnels for transport systems
Mcgarry, F.I. (author)
PROC. INST. ELECTR. AND ELECTRONICS ENGRS. ; 56 ; 535-544
1968
10 Seiten, 2 Tabellen, 15 Quellen
Article (Journal)
English
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