간이계측기를 활용한 땅밀림 거동특성 분석: 산청군 방곡리 땅밀림지를 중심으로

초록

We investigated the movement of tension cracks and characteristics of landcreep areas, focusing on sites in the Banggok-ri, Obu-myeon, and Sancheong-gun regions, using simple measuring instruments. Landcreep of 4.4 cm was observed to have occurred, with a displacement of >3 cm as compared with the control area. This region has experienced landcreep due to road construction and hillside excava tion, and there is a concern that if landcreep reoccurs, a major disaster could arise, because the lower part of the area is adjacent to a road and reservoir. The average slope of the landcreep area is 27.8°, making it a region where rainfall accumulates from the lower mountain slopes to the ridge. There is a statistically significant difference in soil hardness between the lower part of the landcreep and the control area. The electrical resistivity results indicate that the low-resistivity zone is deeper after the rainy season, suggesting that weathered soil and rocks have a deeply layered structure. Therefore, continuous monitoring of the landcreep area and an understanding of its movement are essential to preventing disasters that may result from landcreep.

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