Provided is a method for manufacturing segments for a tower, in particular of a wind turbine, and a prestressed segment for a tower. Provided is tower ring for a tower, a tower of the wind turbine, and a wind turbine. In addition, a prestressing device is provided. The method for manufacturing segments for a tower, in particular of a wind turbine, comprises: arranging at least one prestressing element in a mold, wherein the prestressing element comprises or consists of fiber-reinforced plastic; tensioning the prestressing element; embedding the prestressing element in a concrete mass; hardening of the concrete mass into a longitudinal segment, preferably in the form of a complete longitudinal segment of a tower; removing the hardened longitudinal segment from the mold.

A conduit segment casting mold system includes at least one inner mold; at least one outer mold configured as at least two outer mold sections of opposed shapes that define a cavity between the at least two outer mold sections that is sized to at least partially enclose the at least one inner mold, each of the at least two outer mold sections including a respective mating surface, each of the at least two outer mold sections including at least one hole sized to receive a cable, and the at least one hole of a particular one of the at least two outer mold sections is aligned with the at least one hole of another particular one of the at least two outer mold sections when the mating surfaces of the particular one and the another particular one of the at least two outer mold sections are mated; and a mold base.

Provided is a method for manufacturing segments for a tower, in particular of a wind turbine, and a prestressed segment for a tower. Provided is tower ring for a tower, a tower of the wind turbine, and a wind turbine. In addition, a prestressing device is provided. The method for manufacturing segments for a tower, in particular of a wind turbine, comprises: arranging at least one prestressing element in a mold, wherein the prestressing element comprises or consists of fiber-reinforced plastic; tensioning the prestressing element; embedding the prestressing element in a concrete mass; hardening of the concrete mass into a longitudinal segment, preferably in the form of a complete longitudinal segment of a tower; removing the hardened longitudinal segment from the mold.

A conduit segment casting mold system includes at least one inner mold; at least one outer mold configured as at least two outer mold sections of opposed shapes that define a cavity between the at least two outer mold sections that is sized to at least partially enclose the at least one inner mold, each of the at least two outer mold sections including a respective mating surface, each of the at least two outer mold sections including at least one hole sized to receive a cable, and the at least one hole of a particular one of the at least two outer mold sections is aligned with the at least one hole of another particular one of the at least two outer mold sections when the mating surfaces of the particular one and the another particular one of the at least two outer mold sections are mated; and a mold base.

A method for forming an elongate support structure having a central hollow portion is disclosed including arranging an elongate core member to extend horizontally and then forming a core assembly by locating a first tensioning member at a first end where the first tensioning member including tensioning elements extending from the first end of the core member along the outside of the core member to a second tensioning member located at the second end of the core member. An external mold assembly is attacked to the core assembly between the first and second tensioning members to form a combined mold and core assembly and to also form a cavity extending around and along the central core member through which the plurality of tensioning elements extend. The tensioning elements are then tensioned and the combined mold and core assembly is then positioned in an upright orientation and concrete injected into the cavity formed between the elongate core member and the external mold assembly.

A method for forming an elongate support structure having a central hollow portion is disclosed including arranging an elongate core member to extend horizontally and then forming a core assembly by locating a first tensioning member at a first end where the first tensioning member including tensioning elements extending from the first end of the core member along the outside of the core member to a second tensioning member located at the second end of the core member. An external mold assembly is attacked to the core assembly between the first and second tensioning members to form a combined mold and core assembly and to also form a cavity extending around and along the central core member through which the plurality of tensioning elements extend. The tensioning elements are then tensioned and the combined mold and core assembly is then positioned in an upright orientation and concrete injected into the cavity formed between the elongate core member and the external mold assembly.

A core wall-thinning design method for a prestressed high-performance concrete cylinder pipe is provided. The PCCP uses high-performance concrete, which includes P.O 42.5 or P.O 52.5 portland cement, river sand, mineral powder, fly ash, silica fume, steel fibers, polypropylene fibers, a high-efficiency polycarboxylate superplasticizer, and superabsorbent resin, and which is prepared by: adding all cementitious materials, sand and superabsorbent resin for mixing until uniform dispersion; dissolving the superplasticizer in water, and adding the superplasticizer dissolved in water and evenly stirring; and evenly adding steel fibers and polypropylene fibers and evenly stirring. The compressive strength and the tensile strength of the high-performance concrete are increased. A core wall-thinning design method, includes: establishing an axisymmetric double-layer ring plane strain model, to analyze radial displacement and circumferential stress of an outer ring and an inner ring of the PCCP, and then deriving a calculation formula of the wall-thinning design.

A core wall-thinning design method for a prestressed high-performance concrete cylinder pipe is provided. The PCCP uses high-performance concrete, which includes P.O 42.5 or P.O 52.5 portland cement, river sand, mineral powder, fly ash, silica fume, steel fibers, polypropylene fibers, a high-efficiency polycarboxylate superplasticizer, and superabsorbent resin, and which is prepared by: adding all cementitious materials, sand and superabsorbent resin for mixing until uniform dispersion; dissolving the superplasticizer in water, and adding the superplasticizer dissolved in water and evenly stirring; and evenly adding steel fibers and polypropylene fibers and evenly stirring. The compressive strength and the tensile strength of the high-performance concrete are increased. A core wall-thinning design method, includes: establishing an axisymmetric double-layer ring plane strain model, to analyze radial displacement and circumferential stress of an outer ring and an inner ring of the PCCP, and then deriving a calculation formula of the wall-thinning design.