초록

용어보기논문에서 용어와 풀이말을 자동 추출한 결과로, 시범 서비스 중입니다. AI-Helper

Abstract ▼ AI-Helper

Borehole resistivity tomography survey can be widely employed for cavity detection in the limestone area. But resistivity measurement data are unable to obtain in limestone cavities distributed near the surface, because a polyvinyl chloride (PVC) pipe casing is usually installed to prevent the boreh...

Borehole resistivity tomography survey can be widely employed for cavity detection in the limestone area. But resistivity measurement data are unable to obtain in limestone cavities distributed near the surface, because a polyvinyl chloride (PVC) pipe casing is usually installed to prevent the borehole from collapsing. In order to solve the problem, we devised the contact electrodes which wrapped the outside of the PVC pipe up cooper plates. Borehole resistivity tomography survey were carried out using the devised electrodes in the limestone area where distributed underground cavities were located. And a resistivity tomogram imaging in between two boreholes was obtained where weathered soils, fracture and cavity zones near surface gave low resistivity values of 100 ohm-m or less which coincided with the results from the borehole logging and the standard penetration tests (SPT). The devised contact electrode is useful to survey the resistivity tomography in the collapsed borehole at the area such as limestone, soft ground and soil contamination.

주제어