边坡变迁三维测量与稳定性分析Three-dimensionalLaserScanning.PDFVIP

邊坡變遷三維測量與穩定性分析 馮正一[1] 梁家齊[2] 吳宗江[3] Three-dimensional Laser Scanning and Stability Analysis of Slopes Zheng-yi Feng [1] Jia-Chi Liang [2] Tzong-Jiang Wu [3] [1] 國立中興大學水土保持學系助理教授 （通訊作者） Assistant Professor, Department of Soil and Water Conservation, National Chung Hsing University, Taichung 402, Taiwan, R.O.C. (Corresponding Author) Email: tonyfeng@.tw [2] 國立中興大學水土保持學系碩士班研究生 Graduate student, Department of Soil and Water Conservation, National Chung Hsing University, Taichung 402, Taiwan, R.O.C. [3] 國立中興大學水土保持學系博士班研究生 Graduate student, Department of Soil and Water Conservation, National Chung Hsing University, Taichung 402, Taiwan, R.O.C. 摘 要 本研究介紹應用三維雷射掃描技術對邊坡進行地形掃描及變遷監測 ，藉由三維雷射地形掃描安 全且快速的測量方式 ，改善傳統測量上操作繁複且耗費人力的缺點。此外 ，三維雷射地形掃描所的結果 為高精度的 「點雲」資料 ，能有效掌握原始的邊坡坡型 ，藉由多次掃描的結果能在地理資訊系統中建立 地形變遷資料庫 。在分析上本研究將地理資訊系統結合了邊坡穩定程式 ，並根據地形與水文原理劃分出 「邊坡單元」，在系統中能對單一邊坡單元切取二維地形剖面進行極限平衡穩定性分析。藉由對現地進行 實測結果驗證 ，本研究所介紹的三維雷射地形掃描技術可改善作業時間與簡化作業流程 ，適合邊坡崩塌 災前與災後快速取得地形資料 ，對邊坡進行初步的穩定性評估 。 關鍵詞 ：三維雷射掃描 、地理資訊系統 、邊坡穩定 、邊坡單元 。 Abstract This study introduces the application of 3D laser scanning on landform measurement and monitoring of slopes. The operation of the 3D laser scanning is quick and safe; therefore, it is better than traditional surveying. Beside, the high accuracy “point cloud”data can capture slope landform effectively. With multiple scanning results, we can establish a slope morphological database in GIS system. This study also combines GIS and slope stability program for two-dimensional limit equilibrium stability analysis for “slope unit”. The “slope unit”is defined according to the principle of topography and hydrology. From the field 3D scanning implementations and data analysis, the processes of slope measure and stability analysis is proved to be time saving and simplified. The method is suitable for rapid obtaining slope landform before and