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2003年新疆巴楚—伽师地区发生了MS6.8级地震,地震伴随有大规模砂土液化现象发生。通过现场调查获取了44个场地的剪切波速数据,其中包含19个液化场地勘察点和25个非液化场地勘察点。使用现有两种典型剪切波速判别液化方法对新疆数据进行预测,结果表明该地区土性特殊,判别公式均不适用。据此,依据新疆场地实测数据提出了适用于新疆地区的剪切波速液化线性判别公式。建立的液化判别公式总成功率达84%,对液化和非液化场地回判成功率均为84%,公式形式简单明了,可靠度良好,可为新疆地区液化判别及相关地区性标准制订提供参考。
An earthquake of magnitude MS6.8 occurred in Bachu-Jiashi area in Xinjiang in 2003, accompanied by large-scale sand liquefaction. Shear wave velocity data of 44 sites were obtained through on-site investigation, including 19 liquefaction site survey sites and 25 non-liquefaction site survey sites. Two typical shear wave velocities discriminant liquefaction methods are used to predict the Xinjiang data. The results show that the local soil characteristics and discriminant formulas are not suitable. Accordingly, based on the measured data of Xinjiang site, a linear discriminant formula of shear wave velocity liquefaction is proposed for Xinjiang region. The established success rate of liquefaction discrimination formula is 84%, and the successful rate of both liquefaction and non-liquefaction sites is 84%. The formula is simple and clear, and the reliability is good. It can provide references for liquefaction discrimination and related regional standards in Xinjiang. .