應用非常規攝影量測評估國道3號3.1公里崩塌事件之土方量

Preliminary Study Using Unconventional Photogrammetry to Evaluate the Earthwork Volume-a Case Study of the Landslide Occurred on the Cidu Section of Formosan Freeway

10.29417/JCSWC.201106_42(2).0004

蕭震洋(Cheng-Yang Hsiao)；謝寶珊(Pao-Shan Hsieh)；冀樹勇(Shu-Yeong Chi)

非常規攝影量測 ； 電腦視覺 ； 多視幾何 ； 土方量 ； Unconventional Photogrammetry ； Computer Vision ； Multiple-View Geometry ； Earthwork Volume

中華水土保持學報

42卷2期（2011 / 06 / 01）

120 - 130

繁體中文

非常規攝影「量測」(Unconventional Photogrammetry)無需使用測量專用相機與事前標定(Camera Calibration)，雖計算內外參數(internal & external parameters)較常規傳統攝影「測量」(Traditional Photogrammetry)複雜且精度較低，但一旦發生災害，能以便於取得之現場照片重建三維地形，如與災前地形資料比較，即可量化災害前後地形高程差異變化。文中以民國99年4月25日下午2時33分於國道3號南下線里程約3.1K處之大規模邊坡崩塌事件，分別於事件發生及後續崩塌土方清運完畢後個別進行非常規攝影量測，經比對前後量測資料後，推估崩塌土方量約為225,078.5立方公尺；此估算數據與交通部(2010(上標 a))以工程車實際外運統計資料相近，充分顯示非常規攝影量測確屬可行，能有效、迅速且量化災害前後地形高程變化量。

”Unconventional Photogrammetry” is a measurement methodology not requiring ”Camera Calibration” and can use a regular consumer camera. The calculation of its ”internal and external parameters” is more complicated and less precise than ”Traditional Photogrammetry”. Unconventional Photogrammetry can use readily available photos to reconstruct 3D terrain soon when a disaster occurs. By comparing these terrain data (before and after the disasters), we can quantify the changes in elevation during disasters.We chose a large-scale slope failure event occurred on the Cidu section of Formosan Freeway on 2010/04/25 at 14:33, used ”Unconventional Photogrammetry” to reconstruct terrain data (after the event and when the collapsed earth had been cleared). We estimated the earthwork volume of the landslide was around 225,078.5 m^3; and it's close to the result published by the Ministry Of Transportation And Communications. It showed this method is indeed feasible and able to rapidly, and quantitatively measure the terrain elevation variations.