Railway Knowledge
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2025-5-09Analysis of the causes of aluminium heat welding defects in steel rails and p...
The loose inner surface is not smooth, generally easy to occur in the centre of the weld in the rail waist and rail bottom central triangle. The main cause of such defects is the local temperature is -
2026-6-27What exactly is the difference between 60 kg/m rails and 60 N rails?
On railway lines, rails not only bear the load of trains, but also directly affect the wheel-rail contact condition, the smoothness of rolling stock operation, and the progression of wear and damage t -
2026-5-06rail stress relief and seamless long rail relaying
The machine is suitable for rail stress relief and seamless long rail relaying. While operating in the field at a certain temperature range being lower than the rail locking temperature, by employing -
2026-4-21Calculation of Expansion Gaps at Rail Joints
Rails are connected to one another on the track using rail clips and bolts; this connection is known as a rail joint. Due to the high dynamic forces at the joint and the significant maintenance requir -
2026-3-11What are some commonly used tools and equipment for railway worker?
To do a good job, one must first have the right tools. Only with the right tools can one tackle a challenging task. Let's take a look at what tools railway engineers possess. -
2025-9-18What is a wing rail?
Wing rails are located on either side of the heart rail, "embracing" the heart rail's starting and ending points like wings. Their primary function is to guide the wheel flanges smoothly into and out -
2025-9-04What are straight switches, cross switches, and diverging switches?
Forward Switch A switch where rolling stock first passes over the frogs and then the point rails is called a forward switch. Conversely, a switch where rolling stock passes over the point rails first -
2025-8-13Testing the anchoring strength of spiral spikes on concrete sleepers
The pullout strength test of spiral spikes on concrete sleepers should be conducted on sleepers with spikes already anchored. This can be done using a "Sulfur Anchor Strength Tester for Spiral Spikes -
2025-8-05Causes of Nylon Casing Damage and Failure
Analysis of nylon casing damage and failure in turnout sleepers primarily involves four types of failure: blockage, adhesion, thread breakage, and breakage. -
2025-7-28Dimensions of various parts of common turnout guardrails
1. Types of turnout guardrails: Spacer type guardrail: The rail-spacer type turnout guardrail is made of ordinary rails of the same type. Spacer irons are used to maintain the width of the wheel flan -
2025-7-18Introduction to the Pile Breaking Method for Railway Curve Normal Vector Piles
Common stakeout methods 1. Fixed point method: Start from a designated position (where the measuring rod is placed) and break points at both ends of the curve (where the curve transitions from curve -
2025-7-01What is Track Quality Index(TQI)?
👉What is Track Quality Index(TQI)? TQI is a quantitative measure of the condition of a railway track. It refers to several aspects such as alignment, direction, track gauge, superelevation, and twis