土体液化判定方法对比及应用

目前国内外已有多种液化判定方法。由于不同方法采用的判定依据不同,导致计算精度有所差别,判定时可能会得到不同的结论。为增强判定液化势的准确性,对国内外常用的液化判定标准进行对比分析,进一步阐明NCEER法与LPI法针对不同抗震液化敏感性需求时的适用性。结果表明,对抗震液化敏感性要求较高时,可利用NCEER法,其更适用于单点液化势评估;抗震液化敏感性要求较低时,可利用LPI法,其更适用于总体液化势评估。研究成果已成功应用于沙特吉赞JIGCC项目地基抗液化处理中,为该项目建设提供有力的技术支撑。

Comparison and application of soil liquefaction determination method

The numerous methods of the liquefaction determination are available in the worldwide.Due to the different determination basis of each method,the different calculation accuracy and different conclusions may be achieved by different methods.In order to improve the accuracy of the liquefaction potential determination,we compare and analyze the most commonly used methods for liquefaction determination,and then further clarify the applicability of NCEER method and LPI method for different seismic liquefaction sensitivity requirements.The results show that NCEER method can be used when the sensitivity of seismic liquefaction is high,and it is more suitable for evaluation of single point liquefaction potential.LPI method can be used to evaluate the overall liquefaction potential when the seismic liquefaction sensitivity is low.The results are successfully applied to the ground improvement of the inlet canal in JIGCC project,which can provide strong technical support for the project construction.