軌道保守 (7)

[VI-884] Study on damage reduction products for rail adjustment pad

*鈴木 実¹、枡田 吉弘¹ (1. 公益財団法人鉄道総合技術研究所)

Keywords:rail alignment adjustment, rail ajustment paching, reinforced fiver, cycloolefin polymer resin, polyarylate resin fiber

In the slab track, rail adjustment pads (RAP) are used for rail level alignment. In addition to the wheel load, the rail-creeping force acts on RAP, and damage or slipping out may occur near the expansion joint, etc. As a result of focusing on the temperature characteristics of RAP, it was suggested that the decrease in material strength at high temperature might be one of the cause of damage in some products. Therefore, we developed two types of improved product using polyarylate fiber or cycloolefin polymer resin. For these, the improvement of the flexibility at low temperature, the mechanical strength at high temperature, etc. is confirmed by the characteristic evaluation test.