Ballasted Track Construction Survey Control Key Technologies

High speed train sets a higher request to the track stability and track geometric condition. It is essential that the track should have accurate geometric configurate parameters. Since the complexity of ballastless track's construction technology and the difficulty in soving the problems occured after it is finished, the construction quality of ballastless track is an important guarantee for a successful construction of High-Speed Passenger Dedicated Lines. Based on a large sum of documents both at home and abroad, this thesis makes a detailed research and summary on the construction and fine adjustment of the common present ballastless track in our country. Integrated the status quo of the measurement and controling of ballastless track, it proposes a program fit for the fine measurement equipment of ballastless track, which will make a fine and rapid adjustment for the track. Then the efficiency of ballastless track's layout will be improved.This thesis mainly makes researches on the following works.1. It introduces the merits and demerits of ballastless track and ballasted track, the necessity of taking ballastless track for the high-speed railway. It also analyzes the influence on train operation of track geometry deformation. It summarizes the measuring modes'development and their range of application of the two common present tracks'relative detection in our country.2. Taking the ballastless track's construction process of CRTS I slab as an example, this thesis summarizes the general process of ballastless track's construction, expounding the necessity of the surveying control network to the layou of ballastless track and analyzing the meaning and significance of the "Integration of Three Network" and the problems such as the survey coordinates method and accuracy control of the surveying control network.3. This thesis summarizes the three common fine adjustment methods of ballastless track both at home and abroad, analyzing the construction characteristics of Rheda, Bogl and Zublin, the needed equipment in the measurement with fine adjustment, the fine adjustment methods and the crucial links which require particular attention.4. Towards the requirements of fine adjustment of ballastless track in our country, this thesis proposes the implementation programe of the rail three dimensional accurate measurement trolley, which is fit for the construction, completing construction and operating organizations of ballastless track. Based on analyzing the overall objective and the measurement principles, the thesis designs system overall configuration and the methods about system implementation, analyzing and choosing the way of communication of the key equipment and subsystem. Different modules are partitioned according to the different functions of the sofewares related to the system. Corresponding theoretical derivations are given on account of the adjustment of three dimensional coordinate and the mathematical model of track's smoothness.5. The thesis introduces the system structures of the product and the work procedures of sofeware system. It also analyzes and programs the sofeware operation such as the modules communicating and the operation module of the total station machine. Then it makes a fine adjustment measurement test on the product on the scene.