FLEXIBLE MULTIHOLE PRECAST CONCRETE PIPE

摘要

PROBLEM TO BE SOLVED: To provide a multihole concrete pipe having a joint excellent in flexibility. SOLUTION: An inner multihole precast concrete pipe 2 having a steel plate inner tube 4 of smaller diameter than the body and an outer multihole precast concrete pipe 3 having a steel plate outer tube 5 of same diameter as the body are used as a pair. The gap between the steel plate inner tube 4 and steel plate outer tube 5 is sealed with an elastic seal material 6 fixed to the circumferential surface of steel plate inner tube 4. The steel plate inner tube 4 and steel plate outer tube 5 are jointed by screwing nuts 12 at the opposite ends of an idle bolt 10 penetrating then in the axial direction while leaving some clearance.