A new method of surveying horizontal distance and elevation difference with theodolite-central hair stadia;
经纬仪测量水平距离和高差的新方法——中丝视距法
The horizontal distance X between roadway and the edge of its upper pillar is an important parameter for roadway layout in floor strata and adjacent coal seams.
巷道与上部煤柱边缘之间的水平距离X,是底板岩巷和邻近煤层巷道布置的重要参数。
The calculation method of deducing horizontal distance and elevation difference between two points by utilizing the vertical angle and reading measured with theodolite.
介绍了利用经纬仪测量竖直角和中丝读数 ,推导出两点间的水平距离和高差的计算方法 ,该法与常规视距测量相比 ,推导严谨 ,实测精度较高 ,且不受地形限制 ,方便快捷。
Research purposes: There is no mature scheme of horizontally approaching excavation shield tunnel,so references could be provided for design and construction of the similar projects.
研究目的:盾构区间隧道水平近距离施工在国内尚无成熟的技术方案,对其进行研究,为同类工程的设计与施工提供借鉴和参考。