桥上CRTSII板式无碴轨道施工技术

his paper presents a general situation of ballastless track on high-speed railways at home and abroad. High-speed railway generally possesses the construction characteristics of high precision requirement and strict process control. Aimed at above characteristics, combined with the project of Beijing-Tianjin intercity rail transit, the construction technology of the CRTSII ballastless track was studied in this paper and the construction technology provided by German Borg company was improved. At the same time, many new materials and new technology were adopted in the construction, mainly including electrical insulation, the hoisting and laying of track plate, CA mortar, the tensioning of track plate and so on. The technology, wich are application of height-adjustable base plate moulding board and improving the method of track plate rough pavement positioning, ensured the construction precision. The setting of temporary end thorn and mobile gantry crane with derrick truck for hoisting and laying of track plate sped up the construction progress. Engineering practice indicates that the improved technology has advantages of higher precision, shorter construction period, and obvious economy benefit.