Geotechnical Engineering (한국지반공학회지:지반)

Korean Geotechnical Society (한국지반공학회)
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Liquefaction Strength of Silty Sand through Dynamic Triaxial Tests

진동삼축시험을 통한 실트질 모래의 액상화 강도에 대한 연구

  • 박종관 (서울산업대학교 토목공학과) ;
  • 김상규 (동국대학교 공과대학 토목공학과, 동국대학교 대학원) ;
  • 한성길
  • Published : 1998.02.01
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Abstract

Samples of silty sands and hydraulic fill ground were investigated by dynamic triaxial teats in order to evaluate the liquefaction strengths. In the tests, (1) undisturbed and disturbed samples were prepared, (2) dynamic shear strengths were measured under isotropic and anisotropic condition, and (3) the test results were compared with the other results which were tested by domestic and foreign researchers. The liquefaction shear strengths under ismtropic test condition were presented in terms of the relative densities. The amount of silt under 30o hardly influenced on the liquefaction strength. In the test results of anisotropically consolidated samples the liquefaction strength was dependent on the magnitude of the effective consolidation ratio. These teat results show that the liquefaction strength of the silty sand in Korea went coast exists within the boundary of the values suggested by Seed and Peacock(1971).

국내 해안에 퇴적된 실트질 모래와 hydraulic fill한 지반에서 채취한 시료의 액상화 강도 측정을 위해 응력제어 진동삼축압축시험을 수행하였다. 이를 위해 1) 불교란시료와 교란시료의 액상화 강도 산정과 2) 등방 압밀된 시료와 비등방 압밀된 시료의 반복삼축시험결과 비교, 3) 본 시험결과와 국내 다른 시험자료 및 외국의 결과를 비교하였다. 등방 압밀 시료의 액상화 강도는 시료의 상대밀도에 따라 나타내었다. 실트질 함유량이 30%이하의 경우 액상화 강도는 실트질 영향을 거의 받지 않음이 나타났다. 비등방 압밀된 시료의 액상화 강도는 수직응력을 구속응력으로 나눈 유효압밀비에 영향을 받는다. 본 연구의 시험결과 한국 서해안의 실트질 모래의 액상화 강도는 Seed and Pea cock(1971)가 제안한 범위에서 내에 있음을 알 수 있다.

Keywords

References

  1. 전북대학교 대학원 토목공학과 박사학위논문 해성실트질 모래지반의 지진시 액상화예측에 관한 연구 이의명
  2. 대한토목학회 논문집 실트를 포함하는 모래실 흙의 액상화강도에 관한 연구 황대진
  3. ASTM Standard Test Method for Load controlled Cyclic Triaxial Strength of Soil,D5311,USA.
  4. Journal of the Geotechnical Engineering ,ASCE v.110 no.3 Membrain Penetration Effects in Triaxial Testing Baldi,G.;Nova,R.
  5. Journal of Soil Dynamic and Earthquake Engineering v.14 Cyclic Undrained Behavior of Silty Stand. Erten,D.;Maher,M.H.
  6. Journal of the Geotechnical Engineering ,ASCE v.121 no.3 Liquefaction Behavior of Stand-Gravel Composites Evans,M.D.;Zhou,S.
  7. Journal of the Geotechnical Engineering v.111 no.12 Effect of Initial Shear on Cyclic Behavior of Sand. Ishibashi,I.;Kawarmura,M.;Bhatia,S.K.
  8. KS F 2345-76 비점성토의 상대밀도 시험
  9. Journal of the Geotechnical Engineering Division,ASCE v.103 no.GT2 Effects of Sample Preparation on Sand Liquefaction Mulilis,J.P.;Seed,H.B.;Chan,C.K.;Mitchell,J.K.;Arulanandan,K.
  10. Journal of Soil Mechanics and Foundation Division,ASCE v.93 no.SM3 Simplified procedure for Evaluating Soil Liquefaction Procedure for Evaluating Soil Liquefaction Potential Sed,H.B.;Idriss,I.M.
  11. Geptecjmoqie v.29 no.3 Considerations in the Earthquake-Resistant Design of Earth Dams Seed,H.B.
  12. Journal of the Geotechnical Engineering Division,ASCE v.101 no.GT7 The Sildes in the San Fernando Dams during the Earthquake of February 9,1971. Seen,H.B.;Lee,K.L.;Idrisis,I.M.;Makdisi,F.I.
  13. Report No EERC 73-2,Earthquake Engineering Research Center,University of california,Berkeley,CA. Analysisofthe Slides in the San Fernando Dams During the Earthquake of February 9,1971 Seed,H.B.;Lee,K.L.;Idriss,I.M.;Makdisi,F.
  14. Journal of the Soil Mechanics and Foundations Division,ASCE, v.97 no.SM8 Test Procedure for Measuring Soil Liquefaction Characteristics Seed,H.B.;Peaacock,W.H.
  15. Journal of Getechnical Engineering Division,ASCE v.107 no.GT5 Soil Failure Modes in Undrained Cyclic Loading Selig,E.T.;Chang,C.S.
  16. Soils and Foundations,Japanese Cociety of Soil Mechanis and Foundation Engineering v.23 no.1 Effect of Static Shear on Resistance to Liquefaction Vaid,Y.P.;Chern,J.C.
  17. Journal of Getechnical Engineering Division,ASCE v.105 no.GT10 Static Shear and Liquefaction Potential Vaid,Y.P.;Finn,W.D.L.