本計畫針對地工織布應用於橋墩基礎保護工法，以國道3號大甲溪橋為研究對象，進行現地地工織布保護工法鋪設，以及試驗橋址進行保護工法的沖刷穩定度觀測，評估織布鼎型塊橋基保護工法之成效，以現地試驗方式來驗證本所過去的研究成果，透過觀測之資料評估結果顯示，地工織布能有效減緩向下淘刷而保護鼎型塊穩定之作用；此外，本計畫同時進行數值模擬分析，評估本保護工法之耐洪性，以提供高公局、公路局、臺鐵公司、地方政府等橋管機關(構)未來鋪設橋墩基礎保護工法可選用參考之工法。

The present research focuses on the application of geotextile fabrics to the protection of bridge pier foundations, with the Dajia River Bridge on National Freeway No. 3 selected as the research object. The laying of the on-site geotextile protection construction method, and observation was conducted on the test bridge site for the scour stability of the protection construction method to evaluate the effectiveness of the geotextile-tripod block foundation protection method. The evaluation results of the data observed showed that the geotextile fabric can effectively mitigate downward scouring whereby to protect the stability of the tripod blocks. Furthermore, the present research also involves the conduct of numerical simulation analysis to evaluate the flood resistance of this protection method, to provide a reference for the National Freeway Bureau, Highway Bureau, Taiwan Railway Corporation, and local governments for future selection of pier foundation protection methods.