The assessment and choice of pile accident with analytic hierarchy process is presented,and hierarchy structure model to optimize pile accident plan is established.

According to the actual condition of bridge pile foundation construction accidents in the karst region, the method combining high-pressure jet grouting with static pressure grouting is adopted after comprehensive analyses of all the influence factors, which is proved successful and provided reference for similar projects.

Taking one pile sinking accident in construction process of one pile foundation work in Shanghai as example,base upon analysis of reasons caused the sinking of pile practical construction measures are proposed as well as matters deserving attention in construction process to deal with high-compressible foundation soil,in order to improve the strength of pile and avoid compression failure.