Abstract:The ground anchorages have been widely used and significant achievements have been achieved in the civil engineering,hydraulic engineering and construction engineering in China. The long-term performance and safety assessment issues of the ground anchorages are widely focused,which are the key issues influencing the safety of ground anchorages. According to the research and analysis of long-term performance of seventeen domestic and international ground anchorage projects such as gravity dam,slope,underground opening,dock,shipyard,structure against floatation and foundation pit,the measures and means improving long-term performance of the ground anchorage are taken as follows:(1) allowable factor of safety for the design of ground anchor;(2) anticorrosion protection of the whole length of ground anchor;(3) research and development of new anchor system with mechanical and chemical stability;(4) strictly carrying out the acceptance test with the related code;and (5) setting perfect long-term monitoring and maintenance of ground anchor engineering systems. The safety assessment model is initially constructed;and the identification of potential dangerous sources,the long-term performance of monitoring and detection,the critical indices of safety and failure,and treatment methods for ground anchorages,are all described.