This paper introduces the horizontal control survey of engineering was made by conventional instruments and handy adjustment methods.

本文介绍了利用常规仪器、简易平差方法进行工程平面控制测量。

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Research purposes: Through the theoretical research, this paper puts forward some suitable suggestions on the main technical standards of horizontal control survey for ballastless track construction.

研究目的：通过理论研究，对无碴轨道施工平面控制测量的主要技术标准提出适宜的建议。

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Therefore, the survey key of excavation line is to control horizontal and vertical deviations of tunnel axis.

因此，TB M掘进线路测量关键是控制轴线不发生横、竖向偏移。

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Therefore, the survey key of excavation line is to control horizontal and vertical deviations of tunnel axis.

因此，TB M掘进线路测量关键是控制轴线不发生横、竖向偏移。

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