對於土層層序特性及缺陷之探測，鑽探調查及試驗開挖是目前最普遍的方法，然而鑽探成本高，容易造成資源的浪費；且鑽孔與鑽孔之間，土層是否還有內涵物，也無法由鑽探報告得知，而試坑開挖亦有其深度及數量之限制，欲全面進行，仍有其經費及可行性之顧慮。
　　本文研究重點乃利用具有經濟、快速、精確及涵蓋範圍廣之應力波非破壞性檢測，對土層層序與內涵物進行檢測，將其波形特徵以波傳理論分析及判讀，以期能與鑽探調查得到相輔相成之結果。
　　經由有限元素分析之模擬及探討，並應用數位訊號擷取設備進行現地試驗，最後與鑽探報告比對之結果驗證了土層之訊號特徵與理論推導相符。另外，引入小波分析法對訊號進行後處理，使其波形特徵現象更易於判讀，提高了應力波於非破壞檢測之實用性。

　Soil boring and test pit open cut methods were the methods that usually used for the sounding of defects in and the characteristics of soil strata, but the high money cost and time consuming were the major disadvantages including the shortcoming that required information can not be realized between the boring hole; As for the test pit open cut method, the applicable depth and quantity were the major concern.

　The key point of this approach is the usage of an economic, fast, precisely, and versatile stress wave nondestructive inspection method, for the sounding of the defects in and the characteristics of soil strata, according to the characteristics reflect from the signals captured, via wave propagating theory for a further analyses and identification, then the finding results will be expected to compared with that of soil boring method.

　Having simulated and studied by the numerical Finite Element Method, then the in-situ test were performed by using digital signal capturing facilities, and all the results were compared with those obtained from soil boring method; the results show that the characteristics of signals reflected from soil strata coincide with theory derivations, in addition, the wave-let transformation offer as an powerful processing tool for signal captured, which makes a more easy identifications of the characteristics of signals, then enhance the applicability of nondestructive inspection by stress wave.

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