Device for quickly testing space features of surface cracks of core wall dam and use method thereof

The invention relates to the field of core wall dam safety detection and further relates to a device for quickly testing space features of surface cracks of a core wall dam through a resistivity method and a use method thereof. The device for quickly testing space features of surface cracks of the core wall dam comprises a parallel electric collector and one or more test devices, wherein each test device comprises a base with at least 20 small holes and copper bars; the copper bars are inserted into the small holes of the base; the bottom ends of the copper bars are of disc shape; the top ends of the copper bars are connected with the electric collector through copper wires. The method provided by the invention is a measure for indirectly testing the surface cracks of the core wall dam and has the advantage of quick, stereoscopic and lossless dynamic monitoring; the form of the surface cracks and the underground extension degree are conveniently and accurately described; the malignant development of comprehen