Abstract: The intermediate anchor includes an abutment body for an end of an anchoring element mounted on an end of a pretensioning element, the abutment body is supportable on an inner side of a wall of the centrifugal concrete mold and mountable on the inner wall. At least one anchor bolt extendable through the wall of the centrifugal concrete mold in a sealed manner mounts the abutment body. The abutment body has a conical recess extending transversely to the anchor bolt for receiving the anchoring element of the pretensioning element. A wedge-shaped projecting piece is releasably mounted on the abutment body and engages the tensioning element in a fork-shaped manner near the anchoring element. The projecting piece is releasable after removal of the pretensioned concrete body from the centrifugal concrete mold and before removal of the abutment body from the concrete body so as to release a portion of the pretensioning element near the anchoring element for separating by a separating device.

Abstract: A mold made of steel and intended for manufacturing tubular objects by a centrifugal casting concrete method is formed of two semicylindrical shells having longitudinal flanges to which locking wedges are welded. The locking wedges provided on the two opposing flanges have oblique surfaces cooperating with each other. The oblique surfaces of the locking wedges extend over a plane of separation between two flanges when the mold is in a closed position.