基于GNSS的高层建筑物基坑监测系统实现与应用

Realization and application of foundation pit monitoring system for high-rise buildings based on gnss

以某高层建筑物基坑地质灾害隐患点监测实际情况为例进行分析,评估了监测站及虚拟基准站观测数据质量;根据实际建设项目的情况,提出综合解决地质灾害GNSS监测项目建设的规范;最后,提出一种组合模型对使用虚拟基准站解算的监测站数据进行去噪处理。结果表明,相比于EMD模型与EMD–ICA模型的去噪效果,该组合模型经数据去噪,标准差降低3.7%与2.7%,信噪比分别提高了19.7%和12.3%,相关系数方面提高了7.6%和3.3%。

Taking the actual monitoring situation of a high–rise building foundation pit geological hazard hidden point as an example,the observation data quality of the monitoring station and the virtual reference station is evaluated.According to the actual situation of the construction project,the specification for the construction of GNSS monitoring project to comprehensively solve geological disasters is proposed.Finally,a combined model is proposed to denoise the monitoring station data solved by virtual reference station.The results indicate that the EMD-ICA model outperforms traditional EMD denoising,with a reduction of 3.7%and 2.7%in data denoising standard deviation,an increase of 19.7%and 12.3%in signal-to-noise ratio,and an increase of 7.6%and 3.3%in correlation coefficient.In summary,the denoising effect has been greatly improved.