摘要
由于运营铁路路基和桥梁段周围往往存在建筑物或树木等障碍物,通视条件较差,以致于采用在固定基准点上架设全站仪进行导线边角测量以建立平面监测基准网的方法,已不能很好地适应铁路变形监测的复杂环境。因此,本文提出采用半盘位自由测站测量方法建立平面监测基准网,并对没有直接测量的相邻后视基准点间的方位角中误差、测边中误差和相对点位中误差计算公式进行了推导,接着对其自由网平差与约束平差的结果进行精度统计分析,最后进行自由设站测量及精度评定以估算水平位移监测点的点位中误差。研究和实测结果表明,该方法可以达到二等水平位移监测基准网以及监测点点位中误差的精度要求,值得在涉铁项目平面监测基准网测量中推广应用。
Because there are often obstacles such as buildings or trees around the railway subgrade and bridge sections,and the visibility conditions are poor,so that the method of setting up a total station on a fixed reference point to measure distance and angle to establish a plane monitoring reference network has not been well adapted to the complex environment of railway deformation monitoring.Therefore,this paper proposes to establish a plane monitoring reference network using the half-face free station observation method,and to derive the azimuth error,edge measurement error,and relative point error calculation formulas between adjacent backsight reference points without direct observation.Then,the results of the free network adjustment and the constraint adjustment are statistically analyzed.Finally,the free station measurement and accuracy assessment are carried out to estimate the error in the position of the horizontal displacement monitoring point.Research and actual measurement results show that this method can meet the accuracy requirements of the second-class horizontal displacement monitoring reference network and the error in the monitoring points,and it is worth to be popularized and applied in plane monitoring reference network measurement of projects involving railways.
作者
郭城磊
刘凯
林春峰
赵兵
GUO Chengei;LIU Kai;LIN Chunfeng;ZHAO Bing(China Railway ErYuan Engineering Group Co.,Ltd.,Chengdu 610031,China)
出处
《测绘与空间地理信息》
2023年第7期212-216,共5页
Geomatics & Spatial Information Technology
关键词
半盘位自由测站
平面监测基准网
自由设站测量
精度分析
half-face free station observation
plane monitoring reference network
the free station measurement
precision analysis
