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자료유형
학술저널
저자정보
Sahar Rahmanian (Islamic Azad University) Fereydoun Rezaie (Geological Survey of Iran)
저널정보
한국지질과학협의회 Geosciences Journal Geosciences Journal Vol.21 No.1
발행연도
2017.1
수록면
81 - 92 (12page)

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Shear-wave velocity (VS) offers a means to determine the seismic resistance of soil to liquefaction by a fundamental soil property. Iwasaki’s (1982) method is used to measure the liquefaction potential index for both of them. It follows the general format of the Seed-Idriss (1685) simplified procedure based on standard penetration test blow count and shear wave velocity (VS) on the basis of Andrus et al. (2004) using case history data from 43 boreholes in soils ranging from fine sand, silty sand, gravely sand to profiles including silty clay layers and the average soil shear wave velocity (VS 30) in the south Tehran. Liquefaction resistance curves were established by applying a modified relationship between the shear-wave velocity and cyclic stress ratio for the constant average cyclic shear strain. The study area is the south-east of Tehran and the route of Tehran Metro Line 7. It is observed that there is not a perfect agreement between the results of the two methods based on five empirical relationships assuming cemented and non-cemented condition for soils. Moreover, the liquefaction potential index (PL) value in the Standard Penetration Test (SPT) method is more than that of the VS method. Liquefaction potential index (PL) values based on shear wave velocity (VS) using five empirical relationships in two un-cemented and cemented soil show that the used relations are overestimated and most of them have shown non-liquefaction condition for soils in the studied area.

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