摘要
为了快速、全面地获取岩体随机结构面信息而提高稳定性评价工作,在数字近景摄影测量测取结构面空间坐标的基础上,应用立体几何、方位概念和投影变换理论,提出并建立了基于空间坐标的结构面迹线三维模型、任一投影展示面的迹线二维模型和详细判据的产状解算模型。迹线三维模型数据更加详实展示迹线分布状况,迹线二维模型数据又能获得任一重要投影面的迹线信息并突显迹线物理意义;应用误差理论,探讨了基于数字近景摄影测量的产状解算模型获取产状的精度。实验表明,在数字近景摄影测量建立边坡三维模型点位测量精度≤2cm时,能够解决近似线状结构面的产状获取问题。因此,岩体结构面几何信息解算模型与数字近景摄影测量相结合,可采集到更为全面的结构面几何信息并用于岩体稳定性评价。
In order to obtain geometric information of rock mass discontinuities rapidly and comprehensively to improve stability evaluation quality,a series of solution models,3D trace model,2D trace model of random projection plane and the orientation solution model with detailed criterion were put forward and established under the theories of spatial geometry,azimuth conception and projection transformation on the basis of obtaining spatial coordinates of discontinuities through digital close range photogrammetric technology.In the first place,more detailed information about trace distribution status could be displayed through 3D trace model,and in the second place,trace information of any important projection plane could be obtained through 2D trace model,therefore,its physical significance was highlighted.In addition,orientation obtaining precision based on orientation solution model was discussed through the theory of error.The experimental results demonstrated that the problem of orientation obtaining of approximate linear discontinuities could be solved when position measurement error was less than 2 cm on slope 3D model established by digital close range photogrammetry.On the whole,more abundant,detailed and comprehensive discontinuity information could be obtained and applied to the stability analysis and evaluation with the combination of digital close range photogrammetry and geometric information solution models of rock mass discontinuities.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2012年第6期1839-1846,共8页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(41072196)
中国博士后科学基金项目(20090451125)
吉林大学基本科研业务费项目(200903045)
关键词
结构面
迹线
产状
数字近景摄影测量
discontinuities
trace
orientation
digital close range photogrammetry
