Research on New Statistical Model of Horizontal Displacement Monitoring in Gravity Dam

In order to accurately analyze the change rule of dam horizontal displacement and influencing factors,based on the conventional statistic model,a new high water level factor is added to the traditional statistic model for analysis of the horizontal displacement of Tongjiezi gravity dam.The results show that the new statistic model added new high water level factor can better simulate the influence of sharp increase water level in initial period on the dam horizontal displacement,and the reasonable aging development process is decomposed.Thus,it improves the reliability of the conclusion of the dam safety evaluation.