Method of placing steel tendons through ducts in a concrete structural member

摘要: In pulling or pushing steel tendons, such as strands of wire through ducts positioned in a concrete structural member, the are sheathing tubes encased member. To limit friction acting on tendon it is displaced duct, forces axial direction duct vibrations transversely applied directly to tendon. These at recesses member accessible its outside surface. The compensated by axially directed and application greatly reduces coefficient friction. can be combined particularly useful for moving tendons around small radius curves large redirecting angles.