Combined with the construction practice,the paper introduced a kind of technique of bridge support replacement for reference.

Part of research work and development of technology of prestressed concrete carried out in China Academy of Railway Sciences in the past forty years or more is briefly reviewed, such as the research about fundamental parameters, the experiments and applications of new materials and structures as well as the development of new bridge supports.

Connecting with the types,working mechanisms and erection/application situations of the supports that are frequently used on the highway bridge,this paper analyzes on some common diseases of the bridge supports,and puts forward some measures for preventing these diseases.

Three types of bridge bearing are selected for simulation with different elements and for time path comparative analysis with the input of El Centro waves along and across the bridge.

Based on the analysis of problems of previous bridge bearings after installation,for installation of the bearings of Lhasa River Bridge,the construction method of grouting epoxy resin mortar into anchor bolt holes of a bearing with the aid of potential energy of base plates of the bearing is used.

Through designing the recipe and construction, the physical properties,anti-press and antishear properties of the bridge bearings have come up to the standard issued by the Ministry of Communication.