Integrity inspection of main access tunnel using ground penetrating radar

[摘要] This paper discusses the Ground Penetrating Radar (GPR) survey performed to determine the integrity of wall of tunnel at a hydroelectric power generation facility. GPR utilises electromagnetic waves that are transmitted into the medium of survey. Any reflectors in the medium will reflect the transmitted waves and picked up by the GPR antenna. The survey was done using MALA GeoScience RAMAC CUII with 250MHz antenna. Survey was done on the left, the crown and the right walls of the underground tunnels. Distance was measured using wheel encoders. The results of the survey is discussed in this paper.

[发布机构] Industrial Technology Division, Malaysian Nuclear Agency, Bangi, Selangor, Kajang; 43000, Malaysia^1;Geology ProgrammeSchool of Environmental Sciences and Natural Resources, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Selangor; 43600, Malaysia^2;TNB Research SDN. Bhd., Lorong Ayer Itam, Kawasan Industri Penyelidikan, Selangor, Kajang; 43000, Malaysia^3

[效力级别] 土木建筑工程

[关键词] Geosciences;GPR antenna;Ground Penetrating Radar;Ground penetrating radar (GPR);Transmitted waves;Underground tunnels;Wheel encoders