Abstract: According to the actual proklems of the pavement engineering quality control and pavement maintenance,this paper discusses the necessity of the ground probing penetrating radar technology to solve them.It analyzes the technological characteristics of the radar to examine the pavement depth and pavement structure forming the cavity,and points out that the radar probing technology is a highway zero injuring detection to meet the needs of the surveying error requirements.

Key words: radar probing； pavement depth； cavity； medium； interface；