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| Research on the Main Technical Standards of Horizontal Control for Ballastless Track Construction |
| HE Ai-kuan |
| The Third Survey and Design Institute of China Railway, Tianjin 300251, China |
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Abstract 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.
Research methods: This paper analyzes and estimates the main technical standards of horizontal control based on error theory. Firstly, it has analyzed the limiting error of 10 m-bowstring versine, which should be less than 2 mm, while considering the required precision of regularity of ballastless track laying.
Research results: This paper concluded the main technical standards of the control points for ballastless track laying on passenger dedicated railway lines, and the horizontal control of precise construction traverse and GPS survey. And the paper also puts forward some suggestions on projection deformation control and the design of construction coordinate system.
Research conclusions: The passenger dedicated railway lines need higher precision standards on ballastless track laying, and then the technical standards of horizontal construction control survey should be enhanced. So the establishing of horizontal control datum with appropriate precision standards systematically is the precondition to make sure the precision of ballastless track laying.
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Received: 27 September 2006
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2006, Vol. 23 
