COMPOSITION HAVING LOW THERMAL RESISTIVITY AND METHOD FOR LAYING UNDERGROUND CABLES FOR CARRYING ELECTRICAL ENERGY

摘要

The present invention relates to a system for carrying electrical energy inconnections made by means of underground cables. Inparticular, it relates to a method of laying cables and a trench filler havinga low thermal resistivity, used for laying underground cables forcarrying electrical energy. More particularly, it relates to the use of aninert filler to be disposed in an area around the cables or the partsof the system, such as joints, which are disposed underground. The method oflaying cables disposed in a trench comprises the phasesof: 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 secondlayer 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 secondcomposition in such a way as to fill the said trench; characterizedin that the said first composition comprises: 60-90 % by weight of crushedsand; 4-15 % by weight of si 2-12 % by weight of cement;4-15 % by weight of water.