掲載雑誌（和）： 日本地震工学シンポジウム論文集 Vol： 8-1巻 年： 1990年 頁： 927-932頁 著者（和）： - タイトル（和）： - 抄録（和）：
- キーワード（和）： - 掲載雑誌（英）： PROCEEDINGS OF THE JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM 著者（英）： Masaru KITAURA, Masakatsu MIYAJIMA, Carlos AMANTE タイトル（英）： EVALUATION OF SOIL LIQUEFACTION POTENTIAL OF SAND DEPOSITS BASED ON CRITICAL SPT N-VALUES 抄録（英）：
An alternative simplified procedure for evaluating the liquefaction potential of level saturated sand deposits is proposed in this paper. The procedure compares the modified in-situ standard penetration test (SPT) N-values of the sand deposits with the derived critical values causing liquefaction. The measured N-values are modified for consistent evaluation of stiffness and liquefaction resistance of the soils. Accordingly , empirical equations are developed expressing the modified N-value as a function of the measured N-value, effective overburden pressure and median grain size of the soil. On the other hand, an expression to evaluate the critical N-values is derived based on the amount of induced shear strain corresponding to pore pressure ratio of 50%. In other words, a given sand layer is assumed to liquefy if the excess pore pressure develops to more than 50% of the initial confining stress. In order to demonstrate the effectiveness of the proposed method, several case studies at various sites in Japan are presented. Comparison of the results of liquefaction potential evaluations with observed field behavior suggests that the proposed method can provide an improvement of the existing methods. キーワード（英）： - 記事区分： - 区分 　　　委員会論文集