Effect of Joint Sets on the Earth Pressure against the Support System in a Jointed Rock Mass

서지정보

· 발행기관 : 한국지반공학회
· 수록지 정보 : 한국지반공학회논문집 / 31권 / 12호 / 59 ~ 69페이지
· 저자명 : 손무락, 아데도쿤 솔로몬

초록

This study examined the magnitude and distribution of earth pressure on the support system in a jointed rock massdue to the different joint sets as well as varying the rock type and joint condition (joint shear strength and joint inclinationangle). Based on a physical model test and its numerical simulation, a series of numerical parametric analyses wereconducted using a discrete element method. The results showed that the induced earth pressure was affected significantlyby a joint set depending on the inclusion of the joint inclination angle, which induces a joint sliding condition, butthe number of joint sets alone was not important, even though the earth pressure could be increased slightly as thenumber of joint sets is increased. In addition, the study results were compared with Peck’s earth pressure for soil ground,which indicated that the earth pressure in a jointed rock mass could be considerably different from that in soil ground.
The study suggests that the effects of joint sets as well as rock type and joint condition are important factors affectingthe earth pressure in a jointed rock mass and they should be considered when designing a support system in a jointedrock mass.

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