Abstract: When nondestructive inspection is carried out on the tunnel lining quality by the operation mode of handheld radar antenna, many problems such as line deviation, instrument separation from tunnel surface, low detection efficiency of reciprocating operation and many potential safety hazards, exist. As a result, a tunnel lining quality detection trolley which can realize single fullsection mechanized operation is developed. The trolley integrates a multistage telescopic robotic arm and a ninechannel tunnel quality detection system, and has key technologies such as single multiline synchronous detection, multichannel radar antenna data acquisition control, antenna radar and tunnel wall adaptation, mileage integrated positioning and video acquisition. It has been applied in a tunnel of ZhengzhouWanzhou Highspeed Railway in Hubei Province, and good detection effect has been achieved. Compared with the traditional single line detection method, the detection efficiency is improved from 15 h/km to 1 h/km. On the other hand, the radar antenna adaptive function ensures that the instrument is close to the tunnel surface, and the detection is continuous and reliable; and the application of ninechannel tunnel quality inspection system can realize the informatization of tunnel lining quality detection to some extent.

Key words: tunnel, lining inspection trolley, full section, radar antenna, self , adaption