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대규모 산지지반 활동연약대 규명을 위한 지구물리탐사기법의 활용 연구
신형옥 ( Hyung Ohk Shin ),김만일 ( Man-il Kim ),윤왕중 ( Wang Joong Yoon ) 한국지구물리·물리탐사학회 2018 지구물리와 물리탐사 Vol.21 No.3
The purpose of this study is to understand the ground change of large scale mountainous region and to estimate the active weak zone using geophysical exploration (electrical resistivity and refraction seismic explorations) in large scale deep landslide area located in Wanjugun, Jeollabukdo. We also analyzed the characteristics of deep landslides occurred in metamorphic rocks region and confirmed the approximate scale. As a result of comparative analysis of N-value by standard penetration test (SPT), low resistivity anomaly, and tension crack identified from field investigation, a discontinuity in soil layer was estimated at 10 ~ 15 m below the surface. Based on this results, the distribution pattern of active weak zone was confirmed between the discontinuity in soil layer and estimation line of bedrock.