Pre-stressed concrete tower for wind power generators

A method for erecting a pre-stressed concrete tower for wind power generators, comprising:

• fabricating a plurality of prefabricated elements having concrete semi-circular segments, and flat rhomboidal ribbed segments, the prefabricated parts having internal ducts for pre-stressing cables;
• fabricating a plurality of metallic erection column segments, that include arms that extend axially to an axis of the column for erecting the flat segments;
• building a foundation for the tower;
• mounting on the foundation, a first segment of the erection column;
• installing one first, one second and one third flat segment of a first section of the tower, and fixing the first section flat segments to the foundation and supporting the first section flat segments to the erection column;
• installing the semi-circular segments such that they are adjacent to the flat segments to complete the first section of the tower having a substantially triangular cross section;
• running the pre-stressing cables through the ducts of the flat segments and the semi-circular segments, such that the flat segments and semi-circular segments are fixedly joined together and to the foundation;
• erecting the second and subsequent sections of the tower, by installing the erection columns and the flat and semi-circular segments, until a predetermined height for the tower is reached;
• forming a circular cross section with the three semi-circular segments at the top of the concrete structure;
• and
• running the pre-stressing cables through the prefabricated segments of each and every section of the tower, for joining each segment to the supra- and subjacent segment, tensioning the cables and pouring concrete into the ducts in each and every section of the tower.

A pre-stressed concrete tower for wind-power generators, comprising:

• a pyramidal structure having three flat walls and three rounded walls, alternated and joined together to form the pyramidal structure, the pyramidal structure having a triangular cross section with rounded vertices, such that the tower gradually narrows and ends into a circular cross-section, the pyramidal structure having a plurality of stepped and stacked pyramidal sections assembled from flat concrete segments and semi-circular concrete segments joined together through horizontal pre-stressing cables,
• wherein the horizontal ducts in the flat concrete segments are horizontally aligned with the horizontal ducts in the semi-circular concrete segments at a joint surface between the flat concrete segments and the semi-circular concrete segments such that the horizontal pre-stressing cables extend between and into the horizontal ducts in the flat concrete segments and the horizontal ducts in the semi-circular concrete segments;
• and
• an extension, having a sectioned cylindrical body made only of pre-stressed concrete cylindrical segments.