Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Determination of Shear Wave Velocity Profile Model Considering Uncertainty Caused by Spatial Variation of Material Property in Rockfill Zone of Fill Dam

물성치 변동성에 의한 불확실성이 고려된 국내 필댐 사력부를 위한 전단파 속도 주상도 모델

  • Received : 2018.12.13
  • Accepted : 2019.02.13
  • Published : 2019.02.28
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Abstract

There always exist the spatial variations of material properties such as a shear wave velocity in a dam and between same type dams. These uncertainties cause those in evaluation of a shear wave velocity profile of a dam and should be considered in determining the shear wave velocity profile for a rockfill zone of a fill dam. In this paper, these uncertainties of a shear wave velocity in the rockfill zone of the fill dam in Korea are evaluated. And the shear wave velocity profile model considering these uncertainties in rockfillzone is proposed using the method based on Harmonic wavelet transform. The proposed shear wave velocity profile model is compared with Sawada-Takahashi model widely used for evaluation of a shear wave velocity profile of a rockfill zone of fill dams.

본 연구에서는 필댐 사력부 전단파 속도 주상도 결정시 물성치 변동성에 의해 발생 가능한 불확실성을 평가하고, 평가된 불확실성이 반영된 국내 필댐 사력부를 위한 전단파 속도 주상도 모델을 제안하였다. 이를 위하여 평가된 불확실성을 바탕으로 국내 필댐 사력부에 존재 가능한 깊이-전단파 속도 곡선 400개를 결정하고, 이에 대한 통계분석을 통하여 깊이별 전단파 속도 상한과 하한 곡선을 결정하였다. 결정된 곡선을 바탕으로 Burger 모델 형태의 깊이별 전단파 속도 상한과 하한 주상도 모델을 결정하였다. 결정된 모델은 국내에서 많이 사용되고 있는 Sawada-Takahashi 모델과 비교하였다.

Keywords

GJBGC4_2019_v35n2_29_f0001.png 이미지

Fig. 1. HWAW test in I dam

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Fig. 2. Vs profiles of rockfilled zone of fill dam

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Fig. 3. Magnitude (or energy) and phase space(S)-wave number(K) map of Vs profile of E dam

GJBGC4_2019_v35n2_29_f0004.png 이미지

Fig. 4. Uncertainties in structure of shear wave velocity profile of rockfilled zone among fill dams

GJBGC4_2019_v35n2_29_f0005.png 이미지

Fig. 5. Possible depth-Vs curves in the rockfilled zone of fill dams

GJBGC4_2019_v35n2_29_f0006.png 이미지

Fig. 6. Upper and lower boundary of shear wave velocity with depth and Vs boundary model for rockfilled zone of fill dams

GJBGC4_2019_v35n2_29_f0007.png 이미지

Fig. 7. Comparison of proposed model and Sawada-Takahashi model

GJBGC4_2019_v35n2_29_f0008.png 이미지

Fig. 8. Possible Vs profiles in the rockfilled zone of fill dams for MC.

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Cited by

  1. 신뢰성 기반 해석을 위한 국내 필댐 구성 재료의 전단파 속도 변동계수 결정 vol.36, pp.4, 2019, https://doi.org/10.7843/kgs.2020.36.4.31