了解了土壤動態參數就可針對此特性來進行地盤改良、改善建物設計以避免生命財產的損失。而表面波譜法(Spectral Analysis of Surface Wave Method，簡稱SASW)即為近年來最新興發展於評估土壤動態參數之試驗方法。由於此法進行試驗時僅需將受波器置於測體表面，且對測體之影響屬微小應變（r<0.001%），故此試驗屬非破壞檢測範疇，可簡便、快速求取測體動態參數。
　　本研究重新分析黃俊豪(2003)於中南部國中小學之實驗數據。為求平均頻散曲線的精確性，使用雙重步驟，先使用套裝軟體WinSASW(Joh 1992)來進行maskin與
求取平均頻散點位，再利用江福壽（2004）提出之「改良式延伸趨勢法」得到平均頻散曲線，及其「改良式Satoh剖面評估法」加以評估現地剪力波速剖面。
　　將分析結果與黃俊豪(2003)之結果做一綜合比較，並證實本研究所採用之資料分析方法合理可行。本文並參考李咸亨(1990)與Kim(2001)提出之剪力波速迴歸分析理論做一回歸探討。結果顯示本研究對剪力波速與N值回歸分析之結果與李咸亨之結論有其吻合之處。而本研究也證實了Kim所提出之理論較不適用於深層土壤。

　　The right dynamic parameters of soil deposits will give a better design in structure which will reduce people live and property loss during natural hazard. A seismic method called Spectral-Analysis-of-Surface-Waves (SASW) has been developed for determining soil dynamic parameters in situ. All SASW tests are performed at small strain level (r<0.001 %) with instrumentation placed only on ground surface. Thus, SASW test is a type of nondestructive test.
　　In this study, the data getting from elementary schools in southern Taiwan by Huang (2003) is re-analyzed. In order to modify the average dispersive curve, two steps can be used. First, masking the phase angle data to get average dispersive points by using the software named WinSASW (1992). Furthermore, modified Joh's method and modified Satoh's method which were proposed by Jiang (2004) are used to obtain the average dispersive curve and soil shear-wave velocity for the soil layers.
　　After comparing the result with Huang's result, the analysis approach used in this study is verified.According to the regressive method from Li (1990) and Kim (2001), further analysis on the relation among soil shear-wave velocity, STP N value, and dry unit weight are discussed. The result shows that Kim’s approach is not suitable for deep soil layers.

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