摘要
市域铁路精密控制测量中,当线路无几何水准测量跨江条件时,应根据《国家一、二等水准测量规范》跨河水准测量有关规定进行。以温州市域铁路S2线一期工程中跨越瓯江为例,介绍了采用自由测站三角高程法的点位布置、观测过程。选取满足规范要求观测数据,经各双测回互差限差、各环线的闭合差的分析,获得跨河水准段的高差,然后进行整网闭合差计算,通过与联测两岸的基岩点水准进行闭合差进行分析,表明自由测站三角高程法所得跨河水准高差可以满足《高速铁路工程测量规范》二等水准测量要求。
During the city railway measurement, the river crossing leveling without the conditions of geometrical levelling should be accomplished according the specifications for the first and second order leveling.This thesis introduces the free station-type trigonometric elevation method, inclusive locating theleveling points and the observation process, taking Wenzhou city railway S2 as an example.Data fulfilled the specifications will beselected and analyzed. The calculated height difference of the river crossing section will be used in the entire leveling network adjustment. The result of analyzing the closing error of connect leveling with bedrock leveling pointsof two riversides demonstrates that, the free station-type trigonometric elevation in river crossing leveling fulfils the requirements of the specifications for the first and second order leveling.
作者
郭永睿
GUO-Yongrui(China Railway SIYUAN Survey and Design Group Co.,Ltd,Wuhan 43006)
出处
《铁道勘测与设计》
2018年第3期54-56,共3页
Railway Survey and Design
关键词
自由测站三角高程
市域铁路
跨河水准测量精密控制测量
free station
trigonometric elevation
city railway
river crossing leveling
precision engineering survey
