表面波譜法（Spectral Analysis of Surface Wave Method，簡稱SASW）為近年來新興發展之震測試驗方法，藉由頻譜分析雷利波求取土層剖面剪力波速與剪力模數資料。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(<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。
　　本研究主要針對表面波譜震測資料之評估與分析進行探究，其處理過程包含：決定相速度與評估現地剪力波速剖面。為了頻散曲線之合理性評估，本研究以Joh (1996) 所使用之分析模式為藍本，並參照Nazarian與Stokoe (1985) 所使用之統計評估法則以決定適切之頻散曲線。同時為了快速評估現地剪力波速剖面，本研究修正Joh (1996) 所採用之平均頻散曲線方法與Satoh (1991) 所採用之近似法而提出「改良式Satoh剖面評估法」。
　　此外，本研究重新分析黃俊豪 (2003) 於中部地區試驗之數據並與Stokoe於相同試驗場地所分析之結果作一比較，其結果證實本研究所採用之資料分析模式合理可行；同時發現於相似頻散曲線之前題下，使用改良式Satoh土層評估法與動態勁度矩陣法理論分析之結果對於淺層勁度剖面評估 (依本文研究案例顯示，深度約25公尺以內) 差異不大，然而對於深層勁度剖面評估使用改良式Satoh剖面評估法則有保守評估之趨勢。
　　最後本研究亦嘗試針對受波器擺設與表面波譜法探測地下水位面之可能性進行探究。

　　A seismic method utilizing surface waves of Rayleigh type, called Spectral Analysis of Surface Waves (SASW) has been developed for determining the shear wave velocity and shear modules of geotechnical site. All SASW field tests are performed at small strain level with instrumentation placed only on one exposed surface. Thus, SASW itself is a type of nondestructive testing.
　　In this study, procedures for the interpretation and analysis of SASW measurements were based on the schematic diagram of Joh (1996). To insure the reliability of dispersion data in composite experimental dispersion curve, the statistical criteria suggested by Nazarian and Stokoe (1985) was included. And a new approximate conversion method modified from Satoh (1999) for
evaluation in situ stiffness profile was proposed.
　　According to the preliminary comparison between modified Satoh's method and dynamic stiffness method, the modified Satoh’s method showed a conservative evaluation for depths deeper than about 25m.
　　Finally, some investigation about the arrangement of source and receivers in SASW testing and the possibility of ground water table explored by SASW were also studied in this thesis.

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