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| Further Research on the Measurement Technology of Track Reference Network for High-speed Railway |
| FU Heng-you1,LIU Cheng-long2 |
| 1 .The Third Railway Survey and Design Insititute Group Corporation,Tianjin 300142，China; 2. Southwest JiaotongUniversity, Chengdu，Sichuan 610031，China |
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Abstract Research purposes: In current track reference network for high-speed railway，the coordinates of reference points can be gotten by coordinate transformation after manual leveling and centering, half-face and multi-round measurement. This method has some problems, such as the points couldn’t be preserved forever, low efficiency for measuring and using, their accuracy index couldn’t be assessed. In order to solve these problems，this paper further researches the technology of surveying for high-speed railway track reference network(CPIV).Some simulation experiment and production verification are made.
Research conclusions:(1)A set of marker and the method of its deployment，designed for CP1V surveying, can be used as force-centering stake and be preserved forever. The CPIV network can be used in the stages of construction and operation maintenance. The control datum of ballast less track construction and operation maintenance has been uniformed. ( 2 ) The surveying method of side-angle resection at freely-occupied station for CPIV has realized auto- observation and eliminated the effects of centering error. The accuracy，reliability of observations and efficiency can be improved significantly.(3)In the side-angle resection control network for CPIV, the weight of two kinds of observations has been gotten by Helmet variance components estimation. The principle of indirect adjustment has been used for rigorous rigorous and its adjustment and accuracy assessment for CPIV horizontal network. fruits are reliable.(4)The research fruits can be applied in the The theory of its math model is control of fine adjustment of slab ballast less track for high-speed railway，and it also has important reference value in ballast less track construction and maintenance of urban rail transportation.
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Received: 20 October 2013
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2014, Vol. 31 
