This thesis deals with geotechnical anchors, which are increasingly used in the construction of earth retaining structures. The basic terms are introduced, materials and technology of execution of geotechnical anchors are described from instalation, pre-stressing up to control, supervison and monitoring. Basic principles of the design of geotechnical anchors are also presented. The results of 1193 anchor load tests have been collected performed by two contractors on the retaining structures on the Razdrto – Vipava motorway. The influence of the magnitude of anchor force, anchor free and bond length and number of tendons onto the creep parameter k was then studied in terms of regression analysis.