多基线数字图像相关技术在基坑监测中的应用研究

Research on the application of multi baseline digital image correlation technology in excavation pit’s deformation monitoring

基坑变形监测的对象为基坑岩土性状、支护结构变位和周围环境条件的变化,进行各种监测及分析工作。多基线、大重叠数字图像技术提高了点位解算的精度,可靠性和稳定性进一步增强,实现了远距多点、高频、全域基坑监测数字化测量工作。介绍了多基线数字图像相关技术在基坑变形监测过程中的具体应用原理和相应的计算方法,进一步提高该技术在基坑变形监测过程中的应用价值,也为类似工程基坑变形监测提供一定参考。

The object of deformation monitoring of excavation pits is the changes in the geotechnical properties,support structure displacement,and surrounding environmental conditions,and various monitoring and analysis works are carried out in the field.The multi baseline and large overlap digital images’technologies have improved the accuracy of point solution,which further enhance the reliability and stability,and achieved digital measurement of long-distance,multi-point,high-frequency,and all-region excavation pit monitoring.The article introduces the specific application principles and corresponding calculation methods of multi baseline digital image correlation technology in the process of excavation pit’s deformation monitoring,further improving the application value of this technology in the process of excavation pit’s deformation monitoring,and providing certain reference for similar engineering excavation pit’s deformation monitoring.