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A Numerical Investigation on End Bearing Capacity of Single Pile Installed in Fractured Rock Mass

절리암반에 설치된 단말뚝기초의 선단지지력에 관한 수치해석 연구

Tae-Jung Kim1*
,
Chung-Sik Yoo2
김 태중1*
,
유 충식2
1Graduate Student, Dept. of Mega buildings and bridges, Univ. of Sungkyunkwan
2Professor, Dept. of Civil Engineering, Univ. of Sungkyunkwan
1성균관대학교 초고층·장대교량학과 석사과정
2성균관대학교 건설환경시스템공학과 교수
*교신저자. *Corresponding Author. 
31 January 2013. pp. 61-70
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Abstract

This paper presents the results of a two-dimensional finite element analysis of end bearing capacity of single pile installed in fractured rock mass. A number of cases were analyzed using Hoek-Brown criterion that can consider the condition of rock joints. Considering a wide range of joint conditions in which the pile is embedded into the rock, GSI was set as a main parameter. And the effects of pile diameter, unconfined compressive strength of rock and Hoek-Brown constant were considered. Based on parameter study, end bearing load factor graphs were suggested.

Keywords
End bearing capacity
Finite difference method
Rock foundation
Hoek-Brown failure criteria

본 연구에서는 2차원 유한차분 해석을 이용하여 절리암반에 시공된 말뚝기초의 선단지지력을 분석하였다. 이를 위해 암반의 절리상태를 고려할 수 있는 Hoek-Brown 항복규준을 이용하여 다양한 조건의 수치해석이 수행되었다. 넓은 범위의 절리상태를 고려하기 위하여 GSI를 주 매개변수로 설정하였고 말뚝 직경, 암반의 일축압축강도, Hoek-Brown 상수 의 매개변수 영향을 살펴보았다. 본 연구결과 매개변수들의 변화에 따른 절리 암반에 설치된 말뚝기초의 선단지지력 변화 경향을 확인하였고 이러한 결과를 토대로 매개변수 분석에 따른 선단지지력 결과를 도출하였다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 29
  • No :1
  • Pages :61-70
  • Received Date : 2012-09-04
  • Accepted Date : 2013-01-11
  • DOI :https://doi.org/10.7843/kgs.2013.29.1.61
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