摘要
该文以秦岭隧道工程为例 ,以测量设计为前提 ,全面论述了特长隧道平面GPS网的布测方法 ,包括作业方案设计、外业观测和基线向量解算与评价、控制网平差及其精度与可靠性。同时还对布网中存在的有关问题 ,如原《规范》B级网观测限差及作业要求、隧道进洞方法和隧道GPS网横向贯通误差估计等 ,提出了自己的看法。
The paper takes the Qinling tunnel project as an example and the surveying design as a premise, makes a comprehensive discussion on the planar GPS network layout survey method for an extra-long tunnel, including the operation scheme design, field-work observation, the baseline vector calculation and assessment, the control network adjustment and its precision and reliability. At the same time, it also presents the viewpoint about related problems existed in the network layout, e.g. the observation tolerance and operation requirement of B network, the method of tunnel entrance and the lateral holding through error estimation of the tunnel GPS network etc..
出处
《勘察科学技术》
2000年第5期46-49,64,共5页
Site Investigation Science and Technology
关键词
隧道GPS网
布测方法
观测限差
贯通误差
tunnel GPS network
method of layout survey
observation tolerance
holding through error
