Withdrawal prevention tube provided in the concrete pipe joint structure and concrete tube connected with this

摘要

PROBLEM TO BE SOLVED: To provide a separation prevention joint structure that is disposed inward a collar member, simplifies construction and can easily follow curve laying, an earthquake or displacement of ground.;SOLUTION: A separation prevention joint is provided with a slipping-out length part and a collar tip part with a concrete pipe collar having a predetermined length. In the separation prevention joint, the collar tip part projects to an inner surface side and is formed toward in a propulsion direction as a reception part, and a rubber ring comprises, on a tip outer peripheral surface of a spigot, a water cutoff crimp provided to a propulsion front side over the whole circumference and a protrusion part provided to a propulsion rear side.;COPYRIGHT: (C)2014,JPO&INPIT