[논문]일축압축강도·압열인장강도를 이용한 제주도 화산암의 점착력과 내부마찰각의 간이추정

양순보

doi:10.7843/kgs.2022.38.10.5

일축압축강도·압열인장강도를 이용한 제주도 화산암의 점착력과 내부마찰각의 간이추정
Simplified Estimation of the Cohesion and Internal Friction Angle of Volcanic Intact Rocks in Jeju Island Using Uniaxial Compressive Strength and/or Brazilian Tensile Strength 원문보기

韓國地盤工學會論文集 = Journal of the Korean geotechnical society, v.38 no.10, 2022년, pp.5 - 15

양순보 (일본 국립연구개발법인 해상.항만.항공기술연구소 항만공항기술연구소)

초록
AI-Helper

본 연구에서는, 제주도 화산암의 일축압축강도·압열인장강도를 이용하여 점착력과 내부마찰각을 간편하게 추정하기 위한 방법을 제안하기 위하여, 제주도 화산암석에 대한 삼축압축시험, 일축압축시험 및 압열인장시험의 결과로부터 각각 산정된 점착력 및 내부마찰각을 서로 비교·분석하였으며, 퍼센트 오차 평균값을 이용하여 그 추정 정도를 살펴보았다. 그 결과, 제주도 화산암의 일축압축강도·압열인장강도를 이용한 점착력과 내부마찰각의 다양한 간이 추정법을 제안할 수 있었으며, 제안된 방법 중에서 삼축압축시험 결과로부터 산정된 점착력 및 내부마찰각에 가까운, 다시 말해서 정도가 높은 값을 추정하기 위해서는, 일축압축강도를 이용하여 추정하는 방법이 가장 바람직하다는 것을 알 수 있었다.

Abstract ▼ AI-Helper

In this study, to propose simplified methods for estimating the cohesion and internal friction angle of volcanic rocks in Jeju Island using uniaxial compressive strength and/or Brazilian tensile strength, the estimated values of cohesion and internal friction angle from triaxial and uniaxial compression tests and Brazilian tests were compared in terms of estimation accuracy. This study proposed simplified methods for estimating the cohesion and internal friction angle using the uniaxial compressive strength and/or Brazilian tensile strength of volcanic rocks in Jeju Island. According to the findings, among the proposed simplified methods, the method using uniaxil compressive strength was most desirable to accurately estimate the cohesion and internal friction angle of volcanic intact rocks in Jeju Island.

주제어

표/그림 (13)

그림 Fig. 1. Mohr-Coulomb failure criterion in terms of normal and shear stress
그림 Fig. 2. Mohr circles for the stress states of Brazilian test and uniaxial compression test
표 Table 1. Summary of the mechanical characteristics for Pyoseonri basalt, Trachy-basalt and Scoria (Kim, 2007)
표 Table 2. Summary of the mechanical characteristics for basalts sampled in northeastern, southeastern and northwestern Jeju Island (Yang, 2015b, 2016, 2020)
표 Table 3. Summary of the mechanical characteristics for the basaltic intact rock specimens sampled at G port in Jeju Island (Moon and Yang, 2020)
그림 Fig. 3. Comparisons between the strength parameters obtained from triaxial compression test results and the strength parameters estimated by both corrected brazilian tensile strength and corrected uniaxial compressive strength
그림 Fig. 4. Relation between corrected uniaxial compressive strength and cohesion
그림 Fig. 5. Relation between corrected brazilian tensile strength and cohesion
그림 Fig. 6. The percent error averages of the estimated values of cohesion from corrected uniaxial compressive strength and/or corrected brazilian tensile strength excluding the results of Kim (2007)
그림 Fig. 7. Relation between Hoek-Brown Constant and internal friction angle
그림 Fig. 8. Relation between corrected uniaxial compressive strength (C-UCS) and m_i/C-UCS (Adapted from Yang (2020))
그림 Fig. 9. Relation between corrected brazilian tensile strength (C-BTS) and m_i/C-BTS (Adapted from Yang (2020))
그림 Fig. 10. The percent error averages of the estimated values of internal friction angle from Eq. (16), Hoek-Brown constant and both corrected uniaxial compressive strength and corrected brazilian tensile strength excluding the results of Kim (2007)

참고문헌 (30)

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상세보기
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상세보기
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원문보기 상세보기
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원문보기 상세보기
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원문보기 상세보기
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원문보기 상세보기
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원문보기 상세보기
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원문보기 상세보기
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원문보기 상세보기
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원문보기 상세보기
Yang, S. (2020), "Estimation of Hoek-Brown Constant m i for the Basaltic Intact Rocks in Jeju Island", Journal of the Korean Geotechnical Society, Vol.36, No.10, pp.21-31.

원문보기 상세보기
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상세보기

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