軌道保守(7)

[VI-914] Consideration On Deterioration Mechanism Of CA Mortar At Undersea Tunnel

〇Takahiro Nanri¹, Hiroshi Yamane¹ (1.West Japan Railway Company)

Keywords:Shinkanmon tunnel, slub track , CA mortar, chemical investigation, Calcium leaching

Deterioration of CA mortar cause the longitudinal level irregularity and slub crack at undersea tunnnel. In order to clarify the cause of the deteriolation, chemmical analisis was conducted. As a result, it was clarified that sycles getting wet and dry of seawater cause the fatal deteriolation.