Unlike other type of road building, such as highway guardrail constuction, before starting the railway construction, the materials such as steel rails, rail fasteners and the ballasts need to be prepared in advance. The surveying work before railway construction should also be completed before construction. After a simple cleaning of the roadbed, the next steps of railway construction can be started.
For the first ballast laying of railway track construction, only the bottom layer should be laid, mainly the ballast belt laid in the area below the two rails. The remaining ballasts are transported by trains after the railway line is laid.
Due to the current railway track construction mostly using concrete sleepers, the weight is relatively heavy, all need to use machinery for transport. The railway track construction machine lifts the concrete sleeper from the rear container, transfers it to the front cantilever, falls into position, adjusts the position and places it on the ballast. After each railway sleeper is laid, the machine moves forward a section of distance, so cycle to complete the railway sleeper laid. Railroad fasteners, such as iron plates, track bolts, rail clips, etc., will be pre-reinforced on the rail sleeper at this time, and will be reinforced again after the rail is placed.
