软土深基坑围护结构变形机器视觉监测方法

Machine Vision Monitoring Method for Deformation of Retaining Structure of Deep Foundation Pit in Soft Soil

围护结构变形直接影响软土深基坑工程的稳定性与施工安全,由于进行基坑围护结构变形监测的过程中存在监测准确率偏低的问题,无法为围护结构变形控制提供良好的数据支持,从而制约了深基坑工程施工的顺利开展。文章提出了基于机器视觉的软土深基坑围护结构变形监测方法。根据深基坑工程的实际施工情况与特征,建立软土深基坑围护结构计算模型,根据深基坑工程现场环境条件,采用悬挂式监测点布设的方式,在深基坑围护结构周围合理布设监测点,根据监测点布设结果,采用机器视觉测量技术,对围护结构的变形情况进行实时监测。通过实验分析可知,所提方法的围护结构变形监测值与实际测量值更加接近,监测结果准确率均在94.4%以上,具有较高的监测精度。

The deformation of the enclosure structure directly affects the stability and construction safety of the soft soil deep foundation pit project.Due to the problem of low monitoring accuracy in the process of monitoring the deformation of the enclosure structure of the foundation pit,it is impossible to provide information for the deformation control of the enclosure structure.Good data support restricts the smooth development of deep foundation pit construction.Therefore,a machine vision-based method for monitoring the deformation of soft soil deep foundation pit envelope structure is proposed.According to the actual construction situation and characteristics of the deep foundation pit project,the calculation model of the soft soil deep foundation pit enclosure structure is established.The monitoring points shall be arranged reasonably,and the deformation of the enclosure structure shall be monitored in real time by using the machine vision measurement technology according to the results of the monitoring point arrangement.Through the experimental analysis,it can be seen that the monitoring value of the enclosure structure deformation of the proposed method is closer to the actual measured value,and the monitoring results have an accuracy rate of more than 94.4%,which has a high monitoring accuracy.