Gpr is a newly developed hi - tech survey technique used to detect shallow ground electric differences . we applied gpr to more than 100 projects in zhujiang river delta and hongkong , and obtained good reputations . the application scope involves stratigraphics division , outining of filled stones in the muddly beach , geotechnical prospecting of old wall , karst detecting in the limestone terrain , caving detecting , landslide and slop surveing , the division of wea - thering zone , onion weathering zone , fracture zone and fau - lted zone in the granite area , detecting of buried objects cable , metal nonmetal pipe , channel , air raid she - lter etc . underground in the urban city , archaeology , tracing of orebody , coal measures strata division , testing of the dam and grouting site , quality checking of the surface and foundation of the highway
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