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http://dx.doi.org/10.9720/kseg.2021.4.533

Risk Assessment of Cut Slope by Gravity Field Interpretation and Modelling  

Choi, Sungchan (Geo-Information Research Group Co., Ltd.)
Kim, Sung-Wook (Geo-Information Research Group Co., Ltd.)
Choi, Eun-Kyoung (Geo-Information Research Group Co., Ltd.)
Lee, Yeong-Jae (Geo-Information Research Group Co., Ltd.)
Jang, Hyun-Ick (Korea Expressway Corporation Research Institute)
Publication Information
The Journal of Engineering Geology / v.31, no.4, 2021 , pp. 533-540 More about this Journal
Abstract
Gravity field analysis and density modeling were performed to evaluate the internal state of the rock mass, which is the cause of cut slope collapse. The shape of the weathered zone and the depth of basement could be confirmed from the complete Bouguer anomaly and density model. The basement depth at the center of the cut slope calculated using the Euler deconvolution inverse method is 30 m, which is about 10 m deeper than the surrounding area. In addition, the depth of basement and the thickness of the weathered zone are similar to the boundary between low resistivity and high resistivity in dipole-dipole survey. From the study results, gravity field analysis and density modeling recognizes the internal state of the rock slope and can be used for slope safety analysis, and is particularly suitable as a method to determine the shape of weathered zones in interpreting the safety of cut slopes
Keywords
cut slope; safety; gravity; Euler deconvolution; weathering zone;
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