本研究嘗試以美濃地震之液化案例量化及比較各簡易評估法之之差異性，因各簡易評估法有其特有之發展背景與考量因子，對於相同土層之液化潛能評估卻不盡相同，藉此一研究，探討現行土壤液化評估方法之適用性，希望能夠建立一與本案例狀況相符合之液化評估法。
本研究使用七種SPT-N值土壤液化簡易評估法及一種剪力波速簡易評估法，分別為HBF法、NCEER法、AIJ法、NJRA法、JRA法、T-Y法、CBC法及A-S法，其中之剪力波速分析法僅用來比較SPT-N法與剪力波速法在台南市區之差異，而SPT-N法之土壤液化潛能資料建立，用於比較其結果在台南市區之差異性、準確性以及可修正性，並且以此研究之土壤數據，提供在日本法規中，以NJRA法為例，考量之D50及D10參數，在未使用下之影響。
研究結果顯示，HBF法、NCEER法、NJRA法、T-Y法的液化潛勢結果較接近，較為保守，其中NJRA法之中高潛勢鑽孔比例高達83.6%，另外以平均誤差之結果來看，T-Y法與NCEER法之結果較為接近HBF法。以美濃地震液化表徵回推結果， NJRA法在台南市區之評估結果最為合適，準確率達25%，而AIJ法、JRA法及CBC法所評估之結果偏於不保守。而針對深度加權法之修正，在HBF法、NJRA法、NCEER法及T-Y法中，修正安全係數門檻值須調整至1.1~1.2，而修正中高液化潛勢門檻值須調整至7~10為佳。

The purpose of this article is to present the difference of each result on evaluating liquefaction potential while using seven SPT-N value-based methods. There are HBF (2012), NCEER (1997), AIJ (2001), NJRA (2012), JRA (1990), T-Y (1983), and China (2010). The total of 312 soil profiles have been used to assess the liquefaction potential index with each method, and to calculate error using HBF-based with other methods. Moreover, the accuracy of each methods with liquefied sites and non-liquefied sites were also been evaluated in this study. Based on the accuracy of Tainan area, liquefaction damage assessment established by Iwasaki (1984) has been revised in the article.
From the results of PL show that the PL values of HBF, NCEER, NJRA, and T-Y methods are similar, and the percentage of medium-high potential borehole with NJRA is the highest, 83.6%. For error analysis, the results of average error with T-Y and NCEER methods are closed to HBF method. Also, the average error of both are less than 20%. In the accuracy evaluation part, the highest accuracy 25% is NJRA method in liquefaction case. For the revising part, there is a corrective value in each method with different condition discussed in this article.

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