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Research Article

Case Studies on Determination of Strength Parameters for the Analysis of Rock Slope Stability

암반사면 안정 해석을 위한 강도정수 산정 사례연구

Hak Joon Kim1*
,
Jun-Ho Jeong2
김 학준1*
,
정 준호2
1Professor, Department of Construction Safety and Disaster Prevention Engineering, Daejeon University
2Researcher, Integrated Road Management Research Center, Korea Institute of Civil Engineering and Building Technology
1대전대학교 건설안전방재공학과 교수
2한국건설기술연구원 도로관리통합센터 연구원
*Corresponding Author
31 March 2020. pp. 85-101
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Abstract

The estimation of strength parameters is very important for the stability analysis of rock slopes. Various methods for the determination of strength parameters were suggested by various researchers. The number of methods used for the estimation of strength parameters in the stability analysis of rock slopes were investigated based on literature reviews. The frequency of the method determining strength parameters were investigated with respect to failure types. The cohesion and friction angles of the rock and discontinuities are presented with RMR values. The cohesion shows wider range of values relative to those of friction angles according to current studies. Even though RMR does not show any correlation with cohesion values, RMR and the friction angle of the rock clearly shows a positive relationship. Proper methods should be utilized for the determination of strength parameters with consideration for failure types and be proved through literature reviews. The credibility of determining strength parameters is expected to improve if strength parameters data are accumulated from the back analysis performed for failed local rock slopes.

Keywords
strength parameters
rock slopes
stability analyses
failure type

강도정수의 산정은 암반사면의 안정성 해석에 매우 중요하다. 강도정수를 결정하는 다양한 방법들이 여러 연구자들에 의하여 제안되었다. 암반사면의 안정성 해석을 위하여 강도정수 결정에 사용된 방법들의 빈도를 문헌조사를 통하여 조사하였다. 특히 파괴유형에 따른 강도정수 결정방법의 빈도수를 조사하였다. 사례연구를 통하여 암석과 불연속면의 점착력과 마찰각의 값을 조사하여 RMR값과 함께 제시하였다. 연구 결과에 의하면 점착력은 내부마찰각과 비교하여 상당히 큰 범위를 보였다. RMR은 점착력과는 상관관계를 보이지 않았으나 마찰각과는 뚜렷한 상관관계를 보였다. 파괴유형에 따라 강도정수 결정을 위하여 적절한 방법이 사용되어야 하며 문헌조사를 통하여 결과를 검증해야 한다. 향후 각 지역별로 역해석을 통하여 파괴가 발생한 사면에 대한 강도정수 자료가 축적된다면 강도정수 결정의 신뢰성이 향상될 것으로 기대한다.

키워드
강도정수
암반사면
안정성 해석
파괴유형
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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 :1
  • Pages :85-101
  • Received Date : 2020-03-16
  • Revised Date : 2020-03-25
  • Accepted Date : 2020-03-26
  • DOI :https://doi.org/10.9720/kseg.2020.1.085
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