Abstract: It has been carried out for the concrete inspection on its compressive strength, carbonization depth, impermeability, elastic modulus and inner disfigurement by the advanced non-destructive instruments and lab experiments. The results have shown that the compressive strength meets the requirement of design, the ability against carbonization is pretty low with maximum carbonization speed greater than 1.5 mm/a, impermeability grade being equal W5 or greater meets the design requirement, the concrete elastic modulus ranges from 23 664 MPa to 38 316 MPa regularly, the concrete below surface is homogenous, no loose being found, pit samples show that the concrete compressive strength meets the original design requirement, ranging from 23.4 MPa to 30.8 MPa and its impermeability grade is equal W4 or greater.