液化判别的双曲线模型

发布时间：2018-05-27 09:42

  本文选题：砂土液化 + 标准贯入击数　； 参考：《岩土工程学报》2014年11期

【摘要】：基于国内外液化判别方法存在的问题,提出了一个双曲线形式的液化判别新模型。采用中国大陆以往156例液化数据完成了基于标准贯入试验的新公式构造,利用近来集集和阪神地震312例液化新数据进行了检验,并与现有规范方法和Seed方法进行了对比,结果表明:提出的双曲线模型和液化判别公式对不同地震烈度、地下水位和砂层埋深均有较好的适用性;新模型弥补了现有规范Ⅶ度下浅层液化(砂层埋深小于10 m)判别偏于危险的缺欠,对Ⅷ度和Ⅸ度下浅层土液化和非液化场地的成功率比现有规范表现得更为均衡;新模型可满足临界曲线浅层内快速变化、深层时明显变缓的客观实际要求,克服了规范Ⅷ度、Ⅸ度下深层土(砂层埋深10~20 m)判别严重保守的弊端;新模型具有渐近线形式,更符合实际情况,消除了Seed方法中标准贯入临界值随土层埋深增加先递增后递减的不正常现象。
[Abstract]:A new model of hyperbolic liquefaction discrimination is proposed based on the existing problems of liquefaction discrimination methods at home and abroad. A new formula based on standard penetration test was constructed using 156 previous liquefaction data in mainland China. The new liquefaction data of 312 cases from recent collection and Hanshin earthquake were tested and compared with the existing standard method and Seed method. The results show that the hyperbolic model and liquefaction discriminant formula are suitable for different seismic intensity, groundwater level and sand depth. The new model makes up for the deficiency of the existing code 鈪，

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