移动三维激光扫描监测双圆盾构隧道收敛精度分析
王鑫鸿1夏才初2胡国金1吴廷3李航天3
Accuracy Analysis of Convergence Monitoring in Twin-tube Shield Tunnels Using Mobile Laser Scanning
WANG Xinhong1XIA Caichu2HU Guojin1WU Ting3LI Hangtian3
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作者信息:1.绍兴文理学院土木工程学院， 312000， 绍兴；
2.宁波大学岩石力学研究所， 315211， 宁波；
3.上海市建筑科学研究院有限公司， 200032， 上海
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Affiliation:1.College of Civil Engineering, Shaoxing University, 312000, Shaoxing, China;
2.Institute of Rock Mechanics, Ningbo University, 315211, Ningbo, China;
3.Shanghai Research Institute of Building Sciences Co., Ltd., 200032, Shanghai, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.20230782
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中图分类号/CLCN:U456.3
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栏目/Col:土建工程
摘要:
［目的］移动三维激光扫描技术凭借其优异的测量效率与高精度等特点，在单圆隧道监测领域已被广泛应用。但该技术在双圆盾构隧道的变形监测中鲜有应用，有必要分析移动三维激光扫描监测双圈盾构隧道的收敛精度。［方法］主要通过精度验算方式验证移动三维激光扫描技术在双圆盾构隧道收敛变形监测的可行性。将移动三维激光扫描获取的点云数据经过软件参数设置、环缝纠正得到收敛值与人工全站仪测量的收敛值进行对比分析，更好地验证了移动三维激光扫描系统数据的准确性。同时，通过生成双圆盾构隧道平铺图来分析隧道病害情况。［结果及结论］基于上海轨道交通某双圆盾构隧道区间共1 178环实测数据对比分析发现：从2022年上半年与下半年双圆盾构隧道收敛变化量来看，有90.66%的数据为-1.0~1.0 mm，有99.24%的数据为-2.0~2.0 mm；从FARO S350型激光扫描仪在双圆盾构隧道区间的精度来看，有92.86%的数据为-2.0~2.0 mm，基本都在-3.0~3.0 mm范围以内。
Abstracts:
［Objective］ Mobile 3D laser scanning technology is widely applied in single-tube tunnel monitoring due to its excellent measurement efficiency and high accuracy. However, the application of this technology for deformation monitoring in twin-tube shield tunnels is rare, necessitating analysis of the mobile 3D laser scanning accuracy for twin-tube shield tunnel deformation convergence monitoring. ［Method］ The feasibility of using this technology for convergence deformation monitoring in twin-tube shield tunnels is verified through accuracy validation. Point cloud data collected via mobile 3D laser scanning are processed using software parameter settings and segment ring correction to obtain convergence values, which are then compared with the convergence values measured by manual total station, thereby validating the accuracy of the mobile 3D laser scanning system. In addition, tunnel defects are analyzed by generating an unwrapped elevation view of the twin-tube shield tunnel. ［Result & Conclusion］ Based on a comparative analysis of 1 178 rings of measured data from a twin-tube shield tunnel on a rail transit line interval in Shanghai, it is found that: in both the first half and the second half of 2022, 90.66% of convergence changes in the twin-tube shield tunnel fell within the range of -1.0 to 1.0 mm, and 99.24% fell within -2.0 to 2.0 mm. The accuracy of the FARO S350 laser scanner in the twin-tube shield tunnel interval is 92.86% within -2.0 to 2.0 mm, and 99.58% within -3.0 to 3,0 mm. The field-measured data verifies the reliability of the mobile 3D laser scanning technology.
- 上一篇: 施工荷载耦合作用下超大直径盾构隧道结构力学响应
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