Joining device of a metal segment to a concrete segment in a hybrid hollow tower

A joining device for joining a metal segment of a hollow tower to a concrete segment of the hollow tower, the concrete segment having a first area and a second area with the second area being wider than the first area, said wider area having an end portion that is in contact with the metal segment and a reinforcement element for bolstering a tensile strength of the concrete segment, the joining device comprising:

• (a) an anchoring ring having top and bottom surfaces that are opposed to each other and left and right side surfaces that are opposed to each other and that are transverse to the opposed top and bottom surfaces;
• (b) a set of bolts, each of the bolts having a first end and a second end, the set of bolts being configured such that the first ends of the bolts can pass through first holes in the top surface of the anchoring ring with the second ends of the bolts passing through engaging holes in a base of the metal segment;
• (c) a first set of nuts for securing the first ends of the bolts to the top surface of the anchoring ring with the first ends passing through the first holes in the top surface;
• (d) a second set of nuts for securing the second ends of the bolts to the base of the metal segment with the second ends passing through the engaging holes in the base and with the first ends passing through the first holes in the top surface;
• wherein the anchoring ring comprises (i) a first set of connectors extending from the left side surface of the anchoring ring in a first direction that is substantially perpendicular to the bolts and (ii) a second set of connectors extending from the right side surface of the anchoring ring in a second direction that is substantially perpendicular to the bolts, wherein the second direction is different from the first direction;
• and
• wherein the respective first and second sets of connectors are configured such that, with the first set of nuts securing the first ends of the bolts to the top surface of the anchoring ring and the second set of nuts securing the second ends of the bolts to the base of the metal segment, the first and second sets of connectors do not interfere with the reinforcement element.