【摘要】 传统的液化判别方法虽然简便,但各有缺点。"简化方法"(simplified procedure)是一种新的液化判别方法。借鉴国外的经验,结合国内烈度分级,分析等效循环应力比随地下水位的变化规律,得出了计算临界水平应力指数基准值的方法。根据上海地区的经验关系,得出了考虑粘粒含量的液化判别式,并给出了液化等级的计算方法。实践结果表明:扁铲侧胀试验是一种较好的、有前途的液化判别方法。更多还原

【Abstract】 Although the traditional methods of liquefaction estimation are conventional,there are some shortcomings for the methods.The simplified procedure is a new method invented by professor Seed and Youd.According to the foreign advanced experiences,the regulation of cyclic stress ratio under different ground levels and earthquake intensities is analyzed and an equation to calculate the base value of critical horizontal stress index is presented.A new discriminative formula is recommended to estimate liquefaction,which takes the clay content into account according to the experience in Shanghai area.The results prove that the flat dilatometer test can act as a better method to predict the sand liquefaction potential with boundless prospects.更多还原