Sambros International Services
Railways
Railway construction is also called track laying and ballasting. It is the process of laying the railway sleepers and tracks on the track bed. The railway construction process mainly include transportation and laying of railway sleepers and rails, ballast transportation and laying.
Railway Construction Process:
01 The preparatory work before railway construction
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.
02 Lay ballast in the bottom layer
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.
03 Railway sleeper transport and laying
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.
04 Track laying
Track laying will still use the railway track construction machine. The machine lifts the steel rail section up and move it to the iron plate which above the railway sleeper. After adjusting the position, the railway track machine put down the rail and continue to lay the next section of rail. At this time, there will be workers operating equipment to fasten the rail fasteners, so that the rail is fixed.
05 Ballast laying
Ballasting work includes transporting, uploading, tamping, ballast trimming and other operations. All these processes can be completed by using ballast-laying machine with comprehensive working performance.
06 Other railway construction work
After track laying and ballasting, the rail sections need to be fixed to form a stable line. Fish plate and fish bolts are usually used to connect rail sections of ordinary railways. For high-speed railway lines, thermite welding method is usually used to link rail sections. Finally, the large road maintenance machine will carry out mechanical work and carry out final arrangement and inspection of the track.
If you have any questions about railway construction, don’t be shy to leave us a message.
Our experts will answer them for you.
If you have any questions about railway construction, don’t be shy to leave us a message. Our experts will answer them for you.