摘要
现阶段隧道断面检测主要采用直接测量法、全站仪法、激光断面仪法,其检测点少、速度慢、效率低。本文详细阐述三维激光扫描技术在隧道断面检测中的应用,并与传统检测法成果进行分析对比,研究其在隧道开挖轮廓(超欠挖)、支护内轮廓(平整度、侵限、厚度)、衬砌内轮廓(净空、厚度)检测和断面收敛监测等方面应用效果。通过多组数据对比进行误差分析,指出标靶球数量、定位精度等后视误差及空气质量、施工振动等环境因素为影响精准度的主要因素,并针对性地提出控制措施。在各影响因素达到控制标准条件下,扫描仪精度可满足规范要求,其精度高、效率高、应用范围广,可在隧道施工中推广应用。
At the present stage,tunnel section inspection mainly adopts direct measurement method,total station method and laser section meter method,which have few inspection points,slow speed and low efficiency. This paper elaborates the application of 3D laser scanning technology in tunnel section inspection,and studies its application effect in tunnel excavation profile( excess under-excavation),support inner profile( levelness,encroachment limit,thickness),lining inner profile( clearance,thickness) detection and section convergence monitoring by comparing with the results of traditional inspection methods. Through error analysis by comparing multiple sets of data,it is found that the number of target balls, positioning accuracy and other hindcasting errors, and environmental factors such as air quality and construction vibration are the main factors affecting the accuracy,and targeted control measures are proposed. Under the condition that each influencing factor reaches the control standard,the scanner accuracy can meet the specification requirements,and its high accuracy,high efficiency and wide application range can be promoted and applied in tunnel construction.
作者
关为民
GUAN Weimin(China Railway 16^(th)Bureau Group Co.Ltd.,Beijing 100018,China)
出处
《铁道建筑技术》
2021年第8期111-115,共5页
Railway Construction Technology
基金
中国铁建股份有限公司科技研发计划项目(2019-C17)。
关键词
三维激光扫描
点云
断面测量
超欠挖
平整度
3D laser scanning
point cloud
cross-section survey
excess under-excavation
flatness
