摘要
针对当前水平位移监测缺乏精度分析的现状,提出了全站仪小角监测的精度分析方法,有效评价了水平位移精度。利用恒天国际大厦基坑水平位移观测数据,对水平位移进行定性、定量与可视化分析,对不稳定点进行累积位移量分析与稳定性分析,并评估水平位移监测所达到的精度等级。试验结果发现,该精度分析方法可有效评价全站仪小角法水平位移施测精度,同时发现仪器对中误差和目标偏心误差是影响精度的主要因素,仪器精度与观测测回数是次要影响因素,因此施测过程中必须严格控制对中偏心和目标偏心这2项误差,以保证监测精度。
For lack of precision analysis of horizontal displacement monitoring currently,this paper puts forward a method for precision analysis of the small angle monitoring using total station and evaluated precision of horizontal displacement effectively.By using the horizontal displacement observation data of foundation excavation of Hengtian International Building,it was done that qualitative and quantitative analysis and visualization,and it was also done that the horizontal displacement analysis of the unstable point and the precision level assessing reached.The experimental results show that the proposed method can effectively evaluate the horizontal displacement precision of small angle for total station monitoring, and it also found that centring error and target eccentricity error are main factors affecting the precision, and the precision of the instrument and measuring number are secondary factors,so they must be strictly controlled during measuring to ensure the monitoring precision.
作者
武广臣
刘艳
WU Guangchen;LIU Yan(Liaoning Institute of Science and Technology,Benxi,Liaoning 117004,China)
出处
《施工技术》
CAS
2018年第23期80-83,89,共5页
Construction Technology
关键词
基坑
小角法
水平位移
监测
全站仪
分析
foundation excavation
small angle method
horizontal displacement
monitoring
total station
analysis
