【摘要】 对我国现行《水利水电工程地质勘察规范》(GB 50487-2008)中,标准贯入试验判别地基砂土地震液化的方法进行讨论分析,研究标准贯入击数挖填方校正方法对地基砂土液化判别结果的影响,指出现行校正方法具有挖方过于保守,填方偏于不安全的问题,在总结国内外相关研究成果的基础上,建议新的校正方法。更多还原

【Abstract】 This paper presents a discussion on the SPT-based liquefaction potential evaluation method specified by the code for engineering geological investigation of water resources and hydropower(GB 50487-2008) and examines the influence of this method for correction of SPT blow counts on the evaluation results of foundation soils, in the condition of effective overburden pressure variation caused by excavation or filling. Results reveal two issues in the application of the method specified by the existing code: 1) the method is too conservative for excavation, and 2) it tends to be unsafe for filling. A new correction method for evaluation of the influences of excavation and filling is recommended on the basis of analyzing the relevant research achievements.更多还原