Engineering Characteristics of Crushed Rockfill Material

  • Lee, Young-Huy (Member, Associate Professor, Dept. of Civil Eng Yeungnam Univ)
  • 발행 : 1997.06.01

초록

파쇄된 석괴댐 재료의 공학적 특성을 조사하기 위하여 대형 삼축시험을 실시하였다. 시험에 사용된 재료는 greywacke이고, 시료는 골재의 최대 치수가 각각 38.1mm, 25.4mm 및 19.1mm이며 서로 평행한 3개의 입도분포곡선을 사용하였다. 시료의 크기는 $\phi300mm\times600mm$이고, 구속응력은 5t/$m^2$에서 60t/$m^2$까지 변화시켰다. 시험결과, 석피재료의 응력-변형율 관계 및 내부마찰각에 미치는 골재의 최대치수의 영향은 무시할 수 있는 것으로 나타났다. 구속응력이 5t/$m^2$에서 60t/$m^2$으로 증가될 때, 내부마찰각은 $51.6^{\circ}$에서부터 $40.5^{\circ}$까지 감소 하였다. 석괴재료에 대한 삼축시험결과로부터 쌍곡선 모델의 매개 변수를 산정하여, 이 값들을 Duncan등(1980)의 입상재료(GW및 GP재료)에 대한 추천치와 비교하였다. 매개변수중, 석괴재료의 시험결과로부터 산정된 no 및 K치가 특히 입상재료(GW및 GP재료)에 대한 추천치와 많은 차이를 보이는 것으로 판명되었다.

To investigate the engineering characteristics of crushed rockfill material, the large-scaled triaxial tests have been carried out, The rpckfill is made from the greywacke, and the 3 parallel gradations with different maximum particle size(dmu=38.1mm, 25.4mm and 19.1mm) were designed for the test. The dimension of the specimen is 300mm in diameter and 600mm in height, and the applied confining stress varied from 5t/$51.6^{\circ}$ to 60t/$51.6^{\circ}$. The test results show that the influence of the maximum particle size on the stress -strain r$51.6^{\circ}\; to\; 40.5^{\circ}$ when the confining stress increases from 5t/$51.6^{\circ}$ to 60t/$51.6^{\circ}$ The hyperbolic parameter values estimated from the test result for rockfill are much different from the recommended values by Duncan et. at(1980) for GW and GP material, especially in the $\phi$ ad K-values.

키워드

참고문헌

  1. The sixth Rankine Lecture Geotechnique v.16 The Strength of Soils as Engineering Materials Bishop A.W.
  2. The measurement of Soil properties in the Triaxial Tests Bishop A.W.;Henkel D.J.
  3. Ph.D. Thesis,Univ.of London Correlation between Laboratory Behavior of Rockfill and Field Performance with Particular Reference to Scammonden Dam Charles J.A.
  4. Geotechnique v.30 no.4 The Influence of Confining Pressure on the Shear Strength of Compacted Rockfill Charles J.A.;Watts K.S.
  5. Proc.Symp.on Applicaiton of Limit Equilibrium, Plasticty and Generalized Stress Strain in Geotechnical Engineering The Application of Generalized Stress Strain Relations Christian J.T.;YONG R.N.;SELIG E.T.(eds.)
  6. Technical Report No.S-78-1 Strength and Deformation Properties of Rockfill U.S. Army Waterway Exper.Station. Donaghe R.T.;Cohen M.W.
  7. JI.Soil Mech.Found Div. v.96 no.SM5 Nonlinear Analysis of Stress and Strain in Soils Duncan J.M.;Chang C.Y.
  8. Report No.GT 80-08 office of Research Service, University of California A Computer Programing for Finite Element Analysis of Dams Duncan J.M.;Wong K.S.;Ozawa Y.;FEADAM
  9. JI.Soil Mech.Found Div. v.82 no.SM1 Triazial Shear Tests on Pervious Gravelly Soils Holtz W.G.;Gibbs H.J.
  10. D.Eng.Dissertation Asian Institute of Technology Strength and Deformation Characteristics of Rockfill Lee Y.H.
  11. JI.Soil Mech.Found Div. v.93 no.SM6 Drained Strengh Characteristics of Sand Lee K.L.;Seed H.B.
  12. JI. Soil Mech. Found Div. v.98 no.SM1 Evaluation of Properties of Rockfill Materials Marachi N.D.;Seed H.B.;Chan C.K.
  13. N.G.I. Publ. v.110 Investigation of the Mechanical Properties of Rockfill for the Svartevann Dam Valstad T.S.;Strom E.