The Principle and Application of Ground Penetrating Radar in Highway Engineering

Highway roadbed has defects such as voids, collapses, and caves. If they are not discovered in time, the damage to the highway will affect people's travel safety. With the increasing scale and intensity of urban underground space resource development, urban road collapse accidents are common. In recent years, cities such as Beijing, Shenzhen, Guangzhou, and Nanjing have experienced urban road collapse incidents, which have affected traffic at the least and caused serious losses of life and property at the worst. For underground karst disasters, it is necessary to fully understand the geological information of karst. Construction and operation can be handled in a timely manner to avoid the occurrence of roadbed diseases. As a means of detecting geological conditions, ground penetrating radar has the advantages of high resolution, fast scanning speed, and intuitive images that are easy to interpret. In recent years, the non-destructive testing of ground penetrating radar has achieved good application results and accumulated a lot of engineering experience. This article first introduces the basic principles of ground penetrating radar, focusing on the common applications of ground penetrating radar in the field of highway engineering, mainly including the application of ground penetrating radar in engineering detection and quality evaluation. It analyzes the current problems existing in the application of ground penetrating radar in engineering and puts forward corresponding research ideas.