C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
261/60, 61/4.6
C04B 20/00 (2006.01) C04B 28/02 (2006.01) H02G 1/06 (2006.01) H02G 9/00 (2006.01) H02G 9/02 (2006.01)
Patent
CA 2334457
The present invention relates to a system for carrying electrical energy in connections made by means of underground cables. In particular, it relates to a method of laying cables and a trench filler having a low thermal resistivity, used for laying underground cables for carrying electrical energy. More particularly, it relates to the use of an inert filler to be disposed in an area around the cables or the parts of the system, such as joints, which are disposed underground. The method of laying cables disposed in a trench comprises the phases of: removing the original soil in such a way as to prepare the said trench; disposing a first layer of a first composition in the said trench; disposing the said cables on top of the said first layer; disposing a second layer of the said first composition on top of the said cables; disposing a third layer on top of the said second layer formed by a second composition in such a way as to fill the said trench; characterized in that the said first composition comprises: 60-90 % by weight of crushed sand; 4-15 % by weight of silt; 2-12 % by weight of cement; 4-15 % by weight of water.
L'invention porte sur un système de transport d'électricité par câbles souterrains et en particulier sur un procédé de pose de ces câbles, et sur un matériau de remplissage des tranchées à faible résistivité thermique disposé pour ladite pose autour des câbles souterrains ou de leurs jonctions. Ledit procédé comporte les étapes suivantes: creusement de la tranchée, pose d'une première couche d'une première composition au fond de la tranchée, pose des câbles sur la première couche, pose d'une deuxième couche de la première composition au-dessus des câbles, pose d'une troisième couche d'une deuxième composition sur la deuxième couche pour remplir la tranchée. La première composition contient de 60 à 90 % en poids de sable concassé, de 4 à 15 % en poids d'argile, 2 à 12 % en poids de ciment et de 4 à 15 % en poids d'eau.
Caslini Danilo
Donazzi Fabrizio
Maioli Paolo
Kirby Eades Gale Baker
Pirelli & C. S.p.a.
Prysmian Cavi E. Sistemi Energia S.r.l.
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