The Discussion And Application Of Ballastless Track Construction Measurement Key Technology

Chinese current high speed railway mileage has close to ten thousand km, high-speed railway refers to the speed of more than250kilometers, the high-speed need high requirements with track. when ballastless track rail laying is completed, to make the track geometry parameters reach the design requirements, the track geometry parameters obtained by trolly,according to the track irregularity index to analyze the overrun area,then get the adjustment, but only adjusted through fasteners support rail, once the adjustment overrun the index, seriously it even need to open the track slab to adjust, causing great waste of production, which requires the track slab paving need high precision, and the support of the ballastless track construction surveying control network.Based on the review of domestic and foreign literature and the own engineering practice at the Beijing-Shijiazhuang railway, expounds the establishment of construction control network, CRTS Ⅱ ballastless track slab adjustment technology and track static precision technology, at the same time, it is discussed some problems of track slab adjustment technology in the construction, especially the basic work principle of the trolley and the track irregularity index, comparing accuracy of several trolly, analysing the differences between various types of trolly. Design one program for the side angle resection with total station,it can eliminate the instability CP Ⅲ control points and adjust liberal station point coordinate.