Time Series Analysis of Soil Creep on Cut Slopes Using Unmanned Aerial Photogrammetry

Namgyun Kim; Bongjin Choi; Jaehee Choi; Byonghee Jun

doi:10.9720/kseg.2020.4.447

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2020 Vol.30, Issue 4 Preview Page Next Page

Research Article

Time Series Analysis of Soil Creep on Cut Slopes Using Unmanned Aerial Photogrammetry 무인 항공 사진측량을 이용한 절토사면의 땅밀림 시계열 분석

31 December 2020. pp. 447-456

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Abstract

The study area is a slope in Dogye-eup, Samcheok-si, Gangwon-do. The cutting method was applied to this slope for stabilization in 2009 due to the influence of the waste-rock dump located at the top of slope. Recently, soil cracks and creep have occurred on this slope, and the drainage channel was damaged. Therefore, it was analyzed the topography change through photogrammetry using a UAV. Orthophotos were taken in April and October 2019 respectively. From the Orthophots, Digital Surface Model (DSM) was extracted. Time series analysis was performed by comparing each DSM. The topography of October was pushed forward while maintaining the topography of April. Through these features, it is judged that the soil creep is occurring in this study area.

Keywords

soil creep

UAV

high-res

DSM

연구지역인 강원도 삼척시 도계읍의 사면은 지형변화가 발생하는 지역으로 2009년 사면 절취공사를 수행하여 사면경사완화공법이 적용되었다. 하지만 사면의 상부에 위치한 폐석적치장의 영향으로 2개월 뒤 절취사면의 상부를 확장하여 안정성을 도모하였다. 최근 사면 하부에 위치한 옹벽의 배부름 현상이 발견되고 절취사면의 균열이 나타나 지형변화가 다시 발생하고 있는 것으로 보이고 있다. 이러한 문제를 파악하기 위하여 본 연구에서는 UAV를 이용하여 사진측량을 수행해 지형변화가 발생하는지 확인하고자 하였다. 2019년 4월과 10월 각각 정사영상을 추출하고 Digital Surface Model(DSM)를 추출하여 고해상도의 지형변화를 비교 분석하였다. 10월의 지형은 4월의 지형형상을 그대로 유지한채 앞으로 밀려 나간 모습을 보여 이러한 지형변화는 땅밀림인 것으로 분석하였다.

키워드

땅밀림

무인항공기

고해상도 지형정보

수치표면모델

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Information

Publisher :Korean Society of Engineering Geology
Publisher(Ko) :대한지질공학회
Journal Title :The Journal of Engineering Geology
Journal Title(Ko) :지질공학
Volume : 30
No :4
Pages :447-456
Received Date : 2020-09-03
Revised Date : 2020-11-26
Accepted Date : 2020-11-15
DOI :https://doi.org/10.9720/kseg.2020.4.447

The Journal of Engineering Geology ISSN:1226-5268(Print) 2287-7169(Online) 지질공학

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