大型分岔隧道三维模型试验收敛变形的数码摄影测量应用研究  

Application of Digital Photogrammy in Deformation Measurement for 3D Geo-Mechanics Model Test of Large Tunnel Driving

作　　者：马国梁[1] 张强勇[1] 李术才[1] 陈继光[1] 

机构地区：[1]山东大学土建与水利学院,济南250061

出　　处：《工程勘察》2006年第6期50-52,62,共4页Geotechnical Investigation & Surveying

摘　　要：在模型观测面上设置测量标点,用数码相机拍摄实验各阶段测量标点位置,然后应用BP神经网络进行相片标点坐标变换,对各实验阶段的标点坐标进行识别、比较实现模型标志点的变形计算。将这一方法应用于某大型分岔隧道的施工开挖、加固过程的相似三维地质力学模型试验研究中,取得满意的观测成果,为三维力学模型试验收敛变形观测提供了一种新方法。In this paper, target markers were used for measuring deformation in 3D geo-mechanics model test. This technique includes digital photography and designs a BP network for coordinate transformation. By these techniques, a large 3D model test with high comparability for a designed tunnel has been fulfilled. And the excavation sequence and the supporting reinforcement were also modeled in the test. In comparison with the actual measurement, this method has been proved to be effective.

关 键 词：三维模型试验 施工过程模拟 BP神经网络 坐标变换 收敛变形 

分 类 号：P236[天文地球—摄影测量与遥感]