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Research Article

A Study on Change of Safety Factor according to Slope Analysis Method using Strength Parameters and Slope Change

강도 정수와 경사도 변화를 활용한 비탈면 해석기법에 따른 안전율 변화에 관한 연구

Hyojong Moon1*
,
Jeonghoon Shim1
,
Jisu Jeong1
,
Seungho Lee1
문 효종1*
,
심 정훈1
,
정 지수1
,
이 승호1
1Department of Civil Engineering, Sangji University
1상지대학교 토목공학과
* 교신저자* Corresponding Author
March 2017. pp. 31-40
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Abstract

The slope stability analysis by the limit equilibrium method has the disadvantage that it can be applied only when the analysis is performed by setting the critical plane after analyzing the active surface many times and the soil is uniform and only the safety factor can be calculated. However, the analysis using the strength reduction analysis method has advantages that the engineer can judge various aspects and calculate the safety factor. In this study, the safety factor according to the change of slope and shear strength was compared and analyzed using limit equilibrium analysis and strength reduction method. It is suggested that it is desirable to use the strength reduction method which can synthetically review the stress, displacement, and strain in the soil.

Keywords
Strength Reduction Method (SRM)
Limit Equilibrium Method (LEM)
Safety Factor
Cohesion
internal Friction Angle

한계평형법에 의한 비탈면 안정성 해석은 활동면을 반복적인 해석 후 임계면을 설정하여 해석을 수행하고, 지반이 균질한 경우에만 적용이 가능하며, 안전율만 산정 할 수 있는 단점이 있다. 그러나 강도감소법을 적용한 해석에서는 수행자가 여러 가지 측면에 대해서 판단하고, 안전율을 산정 할 수 있는 장점 등이 있다. 본 연구에서는 동일한 크기의 비탈면을 대상으로 한계평형해석과 강도감소법을 활용하여 경사도 변화에 따른 두 해석법 간의 안전율 변화 양상과 점착력과 내부마찰각의 변화에 따른 안전율 변화 추이를 비교 분석하였다. 각각의 해석법에 따른 안정해석 분석 결과 지반내 응력, 변위와 변형률 등을 종합적으로 검토할 수 있는 강도감소법이 활용도가 높을 것으로 판단된다.

키워드
강도감소법
한계평형법
안전율
점착력
내부마찰각
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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 : 27
  • No :1
  • Pages :31-40
  • Received Date : 2017-01-20
  • Revised Date : 2017-03-22
  • Accepted Date : 2017-03-26
  • DOI :https://doi.org/10.9720/kseg.2017.1.31
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