Abstract：Research purposes: The analysis is made for the current situation of existing control net for the purpose of finding out the available measuring technological solution.
Research methods: Based on the new technical standard of engineering measurement for ballastless track and 200-250 km/h ballast track, the analysis and research are done on existing engineering control net of Shijiazhuang-Taiyuan Passenger Dedicated Railway Line, and the overall evaluation is made.
Research results: It is necessary to build the control measurement net which meets the engineering measurement technical request of the 200-250 km/h ballast track, when using the existing tunnel engineering control net in the section of ballastless track.
Research conclusions: lf specific conditions allow, it should make full use of existing engineering control net and its measuring spots，but the works of linking new control net with existing engineering control net and designing measurement technology schema should be done well wall in order to reduce the influence on excavation work and ensure the quality of the construction.
孙永利,张冠军. 石太客运专线既有工程控制网的现状分析[J]. 铁道工程学报, 2007, 24(8): 71-73.
SUN Yong-li, ZHANG Guan-jun. Analysis of Current Situatuion of Existing Engineering Control Net for Shijiazhuang-Taiyuan Passenger Dedicated Railway Line. 铁道工程学报, 2007, 24(8): 71-73.
2007, Vol. 24 
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