Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Ground Subsidence Mechanism by Ground Water Level and Fine Contents

지하수위와 세립분 함유량에 따른 지반함몰 메커니즘

  • Kim, JinYoung (Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, SungYeol (Department of Rural & Biosistems Engineering, Chonnam National University) ;
  • Choi, ChangHo (Korea Institute of Civil Engineering and Building Technology) ;
  • Kang, JaeMo (Korea Institute of Civil Engineering and Building Technology) ;
  • Kang, KwonSoo (Department of Civil Engineering, Seonam University) ;
  • Jeong, HyoJin (Department of Rural & Biosistems Engineering, Chonnam National University) ;
  • Hong, JaeCheol (Department of Rural & Biosistems Engineering, Chonnam National University) ;
  • Lee, JaeSoo (Department of Rural & Biosistems Engineering, Chonnam National University) ;
  • Baek, WonJin (Department of Rural & Biosistems Engineering, Chonnam National University)
  • Received : 2017.09.08
  • Accepted : 2017.09.11
  • Published : 2017.09.30
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Abstract

Recently, ground subsidence frequently occurs in downtown area. The major causes of the subsidence on the subsurface were the damages of the water supply and sewer pipelines and excavation works in adjacent areas, etc. Because of these various factors, it is not easy to analyze the tendency of occurrence of ground subsidence. The purpose of this study is to clarify the effect of ground subsidence by the change of the fine particle content and ground water level and to establish the ground subsidence mechanism. In this study, a model soil-box was manufactured to simulate the failure of the old sewer pipe which is one of the causes on ground subsidence. And a model test was conducted to investigate the effects of fine contents and ground water level on the cavity occurrence. From the test results, firstly the higher the ground water level, the faster the primary cavity is formed as the seepage stress increases. As a result, the secondary cavity and the ground subsidence rapidly progress due to the relaxation of the surrounding ground. The total amount of discharged soil was decreased as the fine content increased.

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References

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