The curing condition of cast-in-place pile concrete test block is standard curing. The report of compressive strength should be 1 copy, and no data of curing under the same conditions can be found. The maintenance of concrete test block of bored pile cap depends on the requirements of the owner, and the compressive strength report is only the standard. The number of compressive strength groups is determined according to the Technical Specification for Bridge and Culvert Construction, and generally it is not less than two groups in 28 days.