山岳トンネル (1)

[VI-253] Considerations for digital as-built survey accuracy of mountain tunnel

*Kousuke Tanimura¹, Kazuhiro Fujita², Hisashi Nara³, Futoshi Kusumoto¹ (1. SHIMIZU CORPORATION, 2. Japan Construction Method and Machinery Research Institute, 3. Iwasaki Corporatuion)

Keywords:digital as-built survey, survey accuracy, point cloud data, reproducibility, target placement pattern