Method for manufacturing a concrete foundation for a wind power tower pre-stressed with tendons and made of precast concrete parts, in which a formwork for the concrete foundation is erected, in which core elements for making passage openings in the concrete foundation for the tendons are positioned and fixed in place on the formwork, the method comprising the steps of:
- positioning the tendons via at least a first positioning aid supplied on the formwork with an adapter device for a core element and with at least one reference segment for a measuring reflector so that the first positioning aid is positioned and fixed in place in the exact spot of the formwork via the reference segment, the respective core element to be positioned being arranged on the adapter device of the positioning aid;
- and
- casting concrete to form the foundation in the formwork.