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A numerical study on the characteristics of small underground cavities in the surrounding old water supply and sewer pipeline

노후 상하수관 주변지반의 소규모 지하공동 형상 특성을 고려한 수치해석에 관한 연구

  • 안준상 ((주)베이시스소프트 건설IT연구소) ;
  • 강경남 (인하대학교 토목공학과) ;
  • 송기일 (인하대학교 토목공학과) ;
  • 김병찬 ((주)베이시스소프트 건설IT연구소)
  • Received : 2018.01.08
  • Accepted : 2018.02.01
  • Published : 2018.03.31

Abstract

In recent years, the occurrence of ground subsidence phenomenon is frequent in Korea. The Korean government has enacted a special law on underground safety and the law will be enforced from January 1, 2018. Under this new law, underground excavation should be assessed for underground safety impacts. After excavation construction, periodic geophysical surveys should be conducted to investigate the occurrence of underground cavities. When underground cavities were discovered, the underground safety was assessed through numerical analysis. However, it is controversial because the method of numerical modeling the discovered underground cavity is due to be established. In this study, the effect of the depth of the underground cavity from the shape of the underground cavity to the underground cavity was studied using a continuum analysis program. In this study, a method to reflect the shape of the underground cavity to the numerical modeling is presented. The relationship between the shape and depth of the underground cavity, and the factor of safety calculated by the shear strength reduction method (SSR) is presented. The results of this study are expected to form the basic data on underground safety impact assessment.

Acknowledgement

Grant : 지반함몰 발생 및 피해저감을 위한 지반 안정성 평가 및 굴착.보강기술 개발

Supported by : 국토교통과학기술진흥원

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