Measurement technology and its application for tunnel excavation and lining quality based on 3D laser scanning
LI Haibo1，YANG Xingguo1，ZHAO Wei2，HUANG Kangxin3，ZHOU Jiawen1
(1. State Key Laboratory of Hydraulics and Mountain River Engineering，Sichuan University，Chengdu，Sichuan 610065，China；2. Sinohydro Bureau 7 Co.，Ltd.，Chengdu，Sichuan 610081，China；3. College of Water Resource and Hydropower，Sichuan University，Chengdu，Sichuan 610065，China)
The 3D laser scanning technology makes up for this shortcomings which can be used to obtain the spatial information of objects rapidly，precisely and comprehensively. By using of 3D laser scanner，the spatial information of surrounding rocks and lining of the Changheba #2 flood discharging tunnel is sampled，and the improved ICP algorithm is used for point clouds registration，thenaccording to the surrounding rock mass and lining surface features，3D excavation tunnel model and lining model are established by delaunay triangular meshes algorithm and NURBS algorithm，respectively. Based on the Boolean logic operation between established models and design models，the over-under-excavated values are measured accurately，and the measured results indicate that，the tunnel over-excavated degree is influenced by the geological condition and the quality of rock masses. Through the analysis of shapedeviations at four lining tunnel model segments by comparing with design sections，the result shows that the deviation of lining shape relate to not only pouring quality but also excavation quality，besides，the influence of lining deformation can not be ignored. Measurement results show that the shape deviations are well controlled and the maximum deviation is less than 10 mm，which are meeting the design requirements.
李海波1，杨兴国1，赵 伟2，黄康鑫3，周家文1. 基于三维激光扫描的隧洞开挖衬砌质量检测技术及其工程应用[J]. 岩石力学与工程学报, 2017, 36(S1): 3456-3463.
LI Haibo1，YANG Xingguo1，ZHAO Wei2，HUANG Kangxin3，ZHOU Jiawen1. Measurement technology and its application for tunnel excavation and lining quality based on 3D laser scanning. , 2017, 36(S1): 3456-3463.
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2017, Vol. 36 
