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Determination of K values from tunnel model tests in sandy ground

터널모형실험을 통한 사질토 지반에서의 K값의 산정

Yong-Joo* Lee1*
,
Chang-Youl Ryu2
이 용주*1*
,
류 창열2
1서울산업대학교, 건설공학부, 조교수
2서울산업대학교, 건설공학부, 학부연구생
*교신저자. *Corresponding Author. 
31 January 2010. pp. 87-94
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Abstract

This study mainly focused on the subsurface settlement due to shallow and deep tunneling in sandy ground. In order to figure out theoretical deformation patterns in association with the ground loss during the progress of tunneling, laboratory model tests using aluminum rods and finite element analyses using the CRISP program were carried out. As a result of comparison between the model test and the finite element analysis, the similar deformation patterns were found. In addition, it was identified that the most K values obtained from both the FEA and the model tests were distributed between Dyer et al. (1996) and Moh et al. (1996) of the field observation data. Based on the model test data, the linear equation of K for the sandy soil could be obtained.

Keywords
Subsurface settlement
model tunnel tests
soft ground
finite element analysis
K values

본 연구는 사질토 지반에서의 얕은 터널과 깊은 터널굴착으로 인해 발생하는 지중침하에 주안점을 두었다. 터널 굴착과정에서 일어나는 지반손실에 따른 이론적인 변형형태를 규명하기 위해 알루미늄 봉을 이용하는 실내모형실험과 CRISP프로그램을 사용하여 유한요소해석을 수행하였다. 모형실험 결과와 유한요소해석 결과를 비교․분석한 결과, 서로 유사한 변형형태를 가지는 것으로 나타났다. 또한, 지중침하곡선의 폭에 대한 계수인 K값은 Dyer 등(1996)과 Moh 등(1996)의 현장측정 값 사이에 분포하는 것을 확인할 수 있었다. 터널모형실험 결과를 토대로 사질토 지반에서의 선형적인 K방정식을 얻을 수 있었다.

키워드
지중침하
터널모형 실험
연약지반
유한요소해석
K값
References
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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 : 12
  • No :1
  • Pages :87-94
  • Received Date : 2009-12-28
  • Revised Date : 2009-01-04
  • Accepted Date : 2010-01-18
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