基于BDS的建筑物沉降监测与分析  

Building settlement monitoring and analysis based on BDS

作　　者：郭志强 吉顺文[1] 兰为钧 GUO Zhiqiang;JI Shunwen;LAN Weijun(Zhejiang Institute of Hydraulics&Estuary(Zhejiang Institute of Marine Planning and Design),Hangzhou,Zhejiang 310000,China)

机构地区：[1]浙江省水利河口研究院〈浙江省海洋规划设计研究院〉,浙江杭州310000

出　　处：《北京测绘》2024年第7期1070-1075,共6页Beijing Surveying and Mapping

摘　　要：将北斗卫星导航系统(BDS)应用于变形体变形监测中,以评估BDS在施工干扰下的变形监测性能具有重要示范意义。本文通过BDS采集建筑物在施工期及工后期的变形数据,针对监测数据呈现的波动性与随机性特征,首先,使用改进小波阈值函数方法进行降噪处理;其次,对比BDS降噪处理后的数据与水准监测数据;最后,预测建筑物最终沉降量。实测BDS建筑物监测数据并进行处理,结果表明,施工期受多种因素干扰,BDS监测数据中包含大量噪声,本文提出的改进小波阈值函数降噪法能够有效剔除BDS监测数据中的噪声,降噪后数据与水准数据平均相对误差低于10.9%;采用抛物线模型对降噪后数据进行预测,得到当沉降稳定时的最终沉降量范围为-53.43 mm~55.26 mm。本文通过对BDS监测数据进行处理,实现对建筑物沉降变形的有效预测,验证了BDS在施工干扰环境下仍然具备良好的性能。The application of BeiDou satellite navigation system(BDS)in deformation monitoring is of great significance to evaluate the deformation monitoring performance of BDS under construction interference.This article collected deformation data of buildings during and after construction using BDS.In response to the fluctuation and randomness characteristics of monitoring data,firstly,an improved wavelet threshold function method was used for denoising.Secondly,the BDS denoised data was compared with the level monitoring data.Finally,the final settlement of the buildings was predicted.Through actual measurement of buildings by BDS and processing of monitoring data,the results show that the construction period is affected by various factors,and BDS monitoring data contains a large amount of noise.The proposed improved wavelet threshold function denoising method can effectively remove noise from BDS monitoring data.The average relative error between the denoised data and the level data is less than 10.9%.The parabolic model is used to predict the denoised data,and the final settlement range when the settlement is stable is from -53.43 mm to 55.26 mm.This article processes BDS monitoring data to achieve effective prediction of building settlement deformation and verifies that BDS still has good performance in environments under construction interference.

关 键 词：北斗卫星导航系统(BDS) 建筑物 沉降预测 改进阈值函数 抛物线模型 

分 类 号：P258[天文地球—测绘科学与技术]