Study of displacement of bridge pier and abutment foundation caused by earth piling load and its prevention technique

As to the engineering disease caused earth piling load around pier and abutment, by setting measuring spots under the earth piling load at bridge pier and abutment, the displacement feature of pier and abutment as well as the foundation caused by earth piling load is tracked and measured. On the basis of the result of observing analysis, using analytical standard set by BOZOZUK, the extent of damage to practical engineering is evaluated, which indicates that the bridge has been seriously damaged. In addition, the combination technique of applying prestressing anchor cable method to the error correction of pier displacement and prestressing anti-slide pile method to prevention is put forward, and the evaluation of strengthening and error correcting is also conducted. Lastly, authors point out that when building bridges in mountainous regions or hilly land, piling excavated earth under bridge along the line may cause the displacement of bridge pier and abutment so that the bridge structure can not work properly, even is damaged.