E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
61/65
E21D 9/00 (2006.01)
Patent
CA 1240845
ABSTRACT OF THE DISCLOSURE An apparatus for making a tunnel lining from concrete in a single operation with a tunnel excavator comprises a tunnel lining form consisting of a plurality of tunnel lining form segments and a form front adjacent the tunnel excavator and a tunnel lining circular space between the form and the ground. In order to heat the concrete as it is pumped into the tunnel lining circular space to accelerate hardening, transmitting antennae for electromagnetic radiation are mounted in or adjacent the feed pipes for the concrete. Similarly a process for making a tunnel lining from concrete comprises pumping concrete into the tunnel lining circular space and accelerating the hardening of the concrete by heating it with electromagnetic radiation. The tunnel form is rapidly repositioned after the concrete being hardened reaches a sufficient strength.
504036
Babendererde Siegmund
Braach Otto
Hillemeier Bernd
Borden Ladner Gervais Llp
Hochtief Aktiengesellschaft Vorm. Gebr. Helfmann
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