Tool for detecting pier column protective layer

The utility model belongs to the technical field of pier column construction, and particularly relates to a tool for detecting a pier column protective layer, which comprises a shell tube with a sliding cavity inside. The two telescopic rods are inserted into the two ends of the shell pipe respectively; the telescopic rod and the shell pipe form a telescopic structure; the two fixing rods correspond to the telescopic rods, are arranged in a spaced mode and are perpendicularly connected with the shell pipe; a minimum end is formed between one fixed rod and the corresponding telescopic rod; a maximum end is formed between the other fixed rod and the other corresponding telescopic rod; and the shell pipe is connected with the fastening device used for positioning the position of the telescopic rod. The tool has the advantages of being easy to read, high in accuracy, easy to operate and high in detection speed. 本实用新型属于墩柱施工技术领域，具体涉及一种用于墩柱保护层检验的工具，包括内部具有滑腔的外壳管；伸缩杆，伸缩杆具有两根，分别插设于外壳管的两端；伸缩杆与所述外壳管形成可伸缩结构；与伸缩杆对应设置的固定杆，固