FIREPROOF PROTECTION METHOD OF CONSTRUCTION FOR TELECOMMUNICATION CABLE

摘要

PROBLEM TO BE SOLVED: To provide a construction method of a telecommunication cable which can exceed the fireproof performance of demonstration experiment in bridges and tunnels even if a fireproof protection body is made revolutionarily thin by winding a mat having a vacuum layer or winding mats, each having a vacuum layer, in multilayers on the most inner side of the fireproof protection body and forming several layers of vacuum spaces between a communication pipe line and a noncombustible material to completely cut off heat transfer.;SOLUTION: By incorporating a mat or mats, each having a vacuum layer, into the fireproof protection body, the fireproof protection body can be made dramatically light-weight and thin and the construction schedule can be shortened than in a conventional construction method.;COPYRIGHT: (C)2009,JPO&INPIT