Both vertical loads from superstructure and horizontal loads from soil act on the piers in high and steep slope.As a result of the combination effects

the bridge disease tend to appear in the pier

and may create serious security issues.According to an engineering practice

this paper focuses on the mechanism of inclination of piers in high slope

and proposes an evaluation for the safety of piers.The mechanical characteristic of piers was obtained with finite element method

and the inclination and cracking mechanism was analyzed by considering the couple effect of piers and soil.Then the bearing capacity of piers was estimated under various loads combination.The results indicate that the pushing force from the disturbance of potential slip surfaces is the primary cause of inclination of piers

and under combined action of pushing force

vehicle load and motor vehicle’s brake force

the bearing capacity of piers can′t satisfy the design requirements.