摘要
伴随着高精度、高效率全站仪的普及,传统测量技术发生了巨大的革新,三角高程测量逐渐成为水准测量的一种重要途径。当进行桥下水准基点和桥上CPIH控制点的高程传递时,采用全站仪进行中间法三角高程测量,受到的地形限制更小,施测更加灵活。为减少误差来源,提升测量精度,本文根据中间法三角高程的测量原理,应用误差传播定律进行精度分析,推算了前后视距、竖直角等参数对测量精度的影响,计算出不同高度的高架桥在进行三角高程上桥测量时的理论最佳仪器架设位置,并通过工程实例,验证了中间法三角高程的测量精度满足二等水准的指标要求。
With the popularization of high-precision and high-efficiency total station,great innovation has taken place in traditional surveying technology,and triangulated height surveying has gradually become an important way of leveling.When the leveling point under the bridge and the CPIII control point on the bridge are transferred,the total station is used to carry out the middle trigonometric leveling,which is less restricted by the terrain and more flexible in surveying.In order to reduce the source of error and improve the measurement accuracy,this paper analyzes the accuracy by using the law of error propagation according to the measurement principle of Trigonometric Height of intermediate method,and calculates the influence of the parameters such as:Grout and rear sight distance and vertical right angle on the measurement accuracy.Through an engineering example,it is verified that the accuracy of the middle method trigonometric leveling meets the index requirements of the second-class leveling.
作者
李昭熹
LI Zhaoxi(China Railway SIYUAN Survey and Design Group Co.,Ltd,WuHan 430063)
出处
《铁道勘测与设计》
2021年第2期35-38,共4页
Railway Survey and Design
关键词
全站仪
三角高程
误差分析
total station
trigonometric elevation
error analysis
