Based on studying the performance of widely used prestressed grouted rock anchors in water conservancy and hydropower projects
the factors affected on the anchoring load losses such as steel fiber relaxation
rock mass strength and property
construction quality
anchor structure
environment change in long time was discussed
and the mechanism of load losses with factors was put forward. It was observed that the main reasons of load losses versus time are rock mass deformation and construction quality. According to the monitored data of anchoring load losses with the factors
the relativity of the factors and load losses was build up. Furthermore
some engineering controlling methods were taken out. It is believed that the methods discussed in this paper can be used for construction of anchoring engineering in future.