透地雷達法為一具高解析度且測勘迅速的地球物理探勘法，被廣泛應用於地下管線探測、地層描繪、地下水偵檢及污染調查等。近年來其應用於土木工程結構之非破壞檢驗之可能性，受到土木界及地球物理界的重視與研究。本研究的目的是以理論與實例探討透地雷達在公路鋪面工程之應用，特別是檢驗鋪面及路基的特性的可能性及限制。研究目標特別著重於瀝青及混凝土之厚度、裂隙、空洞及鋼筋縱深最大鑑別率、路面鋪設新舊材料厚度等。第一年已完成以瀝青公路鋪面為主之研究。第二年改以混凝土公路鋪面為主。研究鋪面在不同狀況下之透地雷達的反應。除以射線波跡法作模型模擬外作。並選定現場作透地雷達的案例分析。研究結果，除配合現場決定最佳的測勘參數設計外，對增強訊號與雜訊比的資料分析及處理方法亦將加以探討。並依據施測結果，作透地雷達應用於公路鋪面之非破壞檢驗成效的評估。以期透地雷達確能對公路鋪面之非破壞檢驗有所助益。並建立施測技術之標準化作業程序。 Ground penetrating radar (GPR) method is one of the most effective geophysical methods to detecting subsurface structures. It can provide a high resolving image beneath the earth. It is widely used to detecting underground pipes, mapping the subsurface structure, detecting the shallow groundwater and monitoring the pollution plumes of groundwater. Recently, the potential of GPR being applied to locate the defects and damages of concrete structures had been recognized by both geophysicists and civil engineers. The aim of this study is to investigate the possibility and limitation of GPR method applied in solving pavement problems. The first year project was concentrated to map the thickness of asphalt layers in the top of the pavement and inspect the defects and damages of the pavement. Both physical model studies and field surveys were conducted in this study. Detecting cracks, voids and rebars within some special models or pavement were also stressed. The benefit of this research is to provide optimum designed survey parameters and a proper data processing for different inspected targets. Finally, the results did provide a way to assess the defects and damage of civil structures. We will continue to study the way to inspect the defects and damages assessment of pavement by GPR in this year. In addition to this, especially for the asphalt concrete overlays. 研究期間：9001 ~ 9011
