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2014 Vol.16, Issue 2 Preview Page
Evaluation of ground characteristics near underground rainfall storage facilities using shear wave velocity

전단파 속도를 이용한 지하 저류조 주변 지반특성 평가

Seon-Ah Jo1
,
Tae-Min Oh2
,
Gye-Chun Cho3*
조 선아1
,
오 태민2
,
조 계춘3*
1Graduate Student, Dept. of Civil and Environmental Engineering, KAIST
2BK21 Research Professor, Dept. of Civil and Environmental Engineering, KAIST
3Professor, Dept. of Civil and Environmental Engineering, KAIST
1한국과학기술원 건설 및 환경공학과 박사과정
2한국과학기술원, 건설 및 환경공학과 BK21 연구교수
3한국과학기술원, 건설 및 환경공학과 교수
*교신저자. *Corresponding Author. 
31 March 2014. pp. 225-236
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Abstract

Shear wave velocity was used to estimate the geotechnical characteristics (void ratio and shear strength) of ground near an underground rainfall storage facility. An oedometer cell was utilized to measure the shear wave velocity and the displacement of specimens. Shear strengths were obtained by direct shear tests. The relationships along the shear wave velocity, void ratio, and shear strength were verified and used to infer the shear strength profile with the depth. In addition, changes in shear strength due to the construction of the underground rainfall storage system were estimated using the suggested method. The results show that the in-situ shear strength deduced from the shear wave velocity-void ratio-shear strength relationship is in good agreement with that obtained from an in-situ investigation (SPT).

Keywords
Urban underground
Shear wave velocity
Void ratio
Shear strength
Underground rainfall storage

본 연구에서는 지하 저류조 설치에 따른 주변지반의 지반공학적인 특성(간극비, 전단강도)을 전단파 속도를 이용하여 예측하는 것을 목적으로 하였다. 이를 위해 응력 단계별로 전단파 속도와 밀도 상관관계를 실험을 통해 도출하고 밀도와 전단강도 상관관계를 직접전단실험을 통해 획득하였다. 도출된 응력 단계별 전단파 속도와 밀도 상관관계 및 밀도와 전단강도 상관관계를 바탕으로 현장 전단파 속도를 이용하여 대상 지반의 깊이별 전단 강도를 산정하는 방법을 제시하였으며 제시된 기법을 이용하여 지하 저류조 구조물 적용에 따른 시공후 지반거동을 평가하였다. 제시된 방법으로 도출된 전단강도는 현장실험 결과와 유사한 값을 보이며 지반특성 분석에 적용 가능성을 확인하였다.

키워드
도심지 지하공간
전단파 속도
간극비
전단강도
지하 저류조
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Information
  • Publisher :Korean Tunneling and Underground Space Association
  • Publisher(Ko) :한국터널지하공간학회
  • Journal Title :Journal of Korean Tunnelling and Underground Space Association
  • Journal Title(Ko) :한국터널지하공간학회 논문집
  • Volume : 16
  • No :2
  • Pages :225-236
  • Received Date : 2014-03-10
  • Revised Date : 2014-03-19
  • Accepted Date : 2014-03-21
  • DOI :https://doi.org/10.9711/KTAJ.2014.16.2.225
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