评价土体液化势的能量法

本文简要地分析了判断土体液化势的标准,即极限平衡条件和液化条件。并指出它们是不同性质的两个界限,就液化而言应以后者为宜。鉴于目前判断土体液化势的应力分析法存在着某些缺点,故提出了能量分析法。同时为简便起见给出了能量分析的简便法。最后,根据能量分析的简便法确定了1964年6月16日日本新泻（Niigata）地震时,产生液化的重灾区与无液化轻灾区的分界线。显然所得的结果与岸田（Kishida） 、贝国（Koizumi）现场调查的分界线以及西特（Seed）简便法分析的结果相当吻合。

Energy Analysis Procedure for Evaluating Soil Liquefaction Potential

In this paper an analysis of the criteria for evaluating soil liquefaction potential i. e., criteria of limit equilibrium and initial liquefaction is given,and it is pointed out that they are two qualitatively different limits and the latter is better with respect to liquefaction criteria.Since there are some main defects in the current stress analysis method for evaluating soil liquefaction potential, the energy analysis procedure is proposed and its simplified method is also given here in order to have a simple rapid evaluation.Finally, the delineation of boundary between zones of liquefaction and no liquefaction in the Niigata earthquake of June 16,1964,is determined by the simplified method of energy analysis. It may be seen that the boundary determined in this way is in reasonably good agreement with the boundaries determined by Kishda and Koizumi on the basis of field observation and Seed's simplified procedure.