预应力锚索在国外是从大坝的加固或加高工程开始的,我国自1964年首次成功地用于加固坝基,以后逐步应用于边坡和地下洞室的加固,至今我国已有18个水电工程应用预锚技术,在柳江的麻石水电站采用预锚加固技术也获得成功。因而在内锚固段(内锚头)、外锚头和锚索体的设计和施工方面均积累了较丰富的经验。在锚索的防锈蚀方面,如梅山水库在3~#试验 Prestressed anchor in foreign countries is from the dam reinforcement or elevation project started in China in 1964 for the first time successfully used to reinforce the dam foundation, and later gradually applied to slope and underground cavern reinforcement, so far our country has 18 Pre-anchor technology is applied to hydropower projects and pre-anchor reinforcement technology is also applied to the Mashi Hydropower Station in Liujiang River. As a result, a wealth of experience has been accumulated in the design and construction of the internal anchorage section (internal anchor head), the external anchor head and the anchor cable body. In the anti-corrosion of the anchor, such as Meishan Reservoir in the 3 ~ # test