Abstract：A practical bridge engineering with in-situ bored pile foundation is introduced. After 32 in-situ bored piles are constructed，the dynamic low strain test is applied to the whole piles. The defects of 2 piles are revealed，then 3 piles，2 defect piles and 1 random pile，are examined with static loading test and pile sample digging test. The results of composite examinations show the insufficiency of vertical bearing capacity of pile and defect of pile shaft. According to the test results，geological condition and construction diary，the defect causes of piles are comprehensively analyzed，and remedial measures，such as high pressure jet method and pile tip cleaning out method，are taken. After the defect piles are consolidated，the dynamic low strain test and static loading test are applied to the consolidated piles again，and the results of examination show that the treatments meet the demand of design.
