抄録
More than 50 years have elapsed since PC laying on the PC, so there is concern about the aging of the sleepers. In JR East, TC type low maintenance track is laid in the main line section of the metropolitan area, lower line PC sleepers are laid down on the local line, and along with the reduction of maintenance, we are promoting renewal of the facilities of the sleeper. From now on, in the 100 km area of Tokyo excluding these covered line sections and regional trunk lines, aged exchanges of PC sleepers are anticipated, and in the business line of "TC type PC sleeper with under sleeper pad" developed for the purpose of maintenance reduction and orbit enhancement Report on the outline and results of test laying.
