摘要
基于近景摄影测量原理,利用掘进隧洞掌子面上裂隙信息,提出了确定裂隙面产状的方法,并通过将被裂隙所切穿的顶拱曲面沿某一方向拉伸的"曲化平"方法,将弧形线转化成直线,然后应用矢量叉乘确定裂隙面产状,实现了对切穿顶拱的裂隙面产状的计算。最后,通过算例验证了该方法的可行性。
It is a problem to determine the joint attitude using digital image in the close-range photogrammetry technique. The primary reason is that only two-dimensional information but not three-dimensional information is obtained from a single image. When a cranny plane cutting the tunnel vault, cranny traces becoming arc lines will made it more difficult to obtain the cranny information. Based on the close-range photogrammetry theory, a new method to calculate the joint attitude is proposed using the information of the ahead face in excavating tunnel. The arithmetic method called transforming from curved-surface to horizontal plane carry out the calculation of the joint attitude cutting the tunnel vault. Finally, its feasibility is proved by a theory model example.
出处
《地球科学与环境学报》
CAS
2008年第3期283-285,共3页
Journal of Earth Sciences and Environment
基金
陕西省教育厅重点实验室重点科研计划项目(05JS34)
关键词
近景摄影测量
掘进隧洞
裂隙
产状
曲面迹线
close-range photogrammetry
excavating tunnel
joints
attitude
curve plane trace
