基于北斗卫星导航系统的地下车库深基坑沉降监测与分析  

Monitoring and analysis of deep foundation pit settlement of underground garage based on BeiDou Navigation Satellite System

作　　者：黄鑫[1] 张继文 于永堂[1,3] 徐传召 张率 曾涛 王竞革 HUANG Xin;ZHANG Jiwen;YU Yongtang;XU Chuanzhao;ZHANG Shuai;ZENG Tao;WANG Jingge(School of Civil Engineering,Xi an University of Architecture and Technology,Xi an 710055,China;Shaanxi Key Laboratory of Behavior and Foundation Treatment for Special Rocks and Soils,China JK Institute of Engineering Investigation and Design Co.,Ltd.,Xi an 710021,China;China United Northwest Institute for Engineering Design&Research Co.,Ltd.,Xi an 710077,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]机械工业勘察设计研究院有限公司,陕西省特殊岩土性质与处理重点实验室,陕西西安710021 [3]中联西北工程设计研究院有限公司,陕西西安710077

出　　处：《测绘通报》2023年第9期18-24,共7页Bulletin of Surveying and Mapping

基　　金：陕西省技术创新引导专项(基金)计划(2020CGHJ-002);陕西省秦创原“科学家+工程师”队伍建设项目(2022KXJ-086;2022KXJ-094)。

摘　　要：为评估北斗变形监测系统(BDS变形监测系统)在施工干扰环境下的变形监测效果,本文将BDS变形监测系统应用于西安市东郊某地下车库深基坑工程的沉降监测,得到了施工期及工后期的沉降监测数据,根据小波降噪原理对监测数据进行了平滑降噪,并将BDS变形监测系统与水准监测数据进行了对比分析,最后对该场地深基坑的最终沉降量进行了预测。结果表明,施工干扰会导致BDS变形监测系统监测数据在一定波长范围内含有大量噪声,但通过小波降噪法对含噪声数据进行5层分解后,可得到平滑的沉降监测数据,且处理后的数据与水准监测数据的平均相对误差低于10.3%;基于降噪后数据采用修正的Gompertz函数预测得到该场地最终沉降量范围为100~110 mm。相关成果可为BDS变形监测系统在类似工程中的应用提供参考。In order to investigate the monitoring accuracy of Beidou deformation monitoring system under construction interference conditions,the BDS deformation monitoring system is applied to an underground garage deep foundation settlement monitoring project in Xi an,and the settlement monitoring data during the construction period and after the construction period are obtained.According to the wavelet noise reduction principle,the monitoring data are smoothed and noise reduced,and the BDS monitoring data are compared with the level monitoring data for analysis.Finally,the final settlement of the site was predicted.The results show that the construction interference will cause the BDS monitoring data to contain a large amount of noise in a certain wavelength range.However,after the 5-layer decomposition of the original data by Daubechies wavelets,smooth settlement monitoring data can be obtained,and the average relative error of the processed data and the level monitoring data is less than 10.31%.The final settlement at the site was obtained in the range of 100~110 mm based on the noise reduction data using the modified Gompertz function prediction method.The related results can provide a reference for the application of BeiDou positioning system in the ground deformation observation project.

关 键 词：北斗变形监测系统 深基坑 沉降监测 小波降噪 沉降预测 

分 类 号：P237[天文地球—摄影测量与遥感]