Road bridges are critical infrastructure designed to span obstacles like rivers, valleys, or roads, enabling vehicular and pedestrian traffic. Below is an explanation of the main types of road bridges—beam, continuous, arch, cantilever, and suspension bridges—focusing on their structural characteristics, design principles, and typical applications. Each type is tailored to...
A marshalling yard (also known as a classification yard or shunting yard) is a railway facility used to sort and organize railcars into trains based on their destinations, cargo, or schedules. It plays a critical role in freight train operations by efficiently assembling and disassembling trains. Below, I’ll explain the...
Indian Railways (IR) is one of the largest railway networks in the world, operating under the Ministry of Railways. It is classified based on various parameters such as track gauge, speed, traffic, and administrative zones. Below is a detailed classification of Indian Railways: 1. Classification Based on Track Gauge Track...
Coning of Wheels refers to the slight conical shape given to the wheels of railway vehicles, where the diameter of the wheel is larger on the inner side (flange side) and slightly smaller on the outer side. This design is primarily used in railway systems to ensure stability and proper...
Process of Route Surveys and Alignment in Transportation Infrastructure Development Route surveys and alignment are foundational steps in the development of transportation infrastructure, such as roads, railways, highways, or tunnels. These processes ensure that the selected route is feasible, cost-effective, safe, and environmentally sustainable. Below is a detailed explanation of...
In cement concrete pavements, fillers and sealers are critical materials used in joints to accommodate movement, prevent water and debris ingress, and maintain structural integrity. Fillers provide a compressible medium to allow slab expansion, while sealers ensure joints remain watertight and durable. These materials are essential for managing thermal expansion,...
The permanent way, or railway track, is the structure on which trains run, consisting of several key components designed to provide stability, support, and guidance. Here are the main components: These components work together to ensure the track is stable, durable, and capable of supporting heavy train loads while maintaining...
The permanent way refers to the railway track structure, including rails, sleepers, ballast, fastenings, and subgrade, designed to provide a stable and durable foundation for train movement. An ideal permanent way must meet specific requirements to ensure safety, efficiency, durability, and cost-effectiveness. Below is a detailed outline of the ideal...
In cement concrete pavements, joints are intentionally created gaps or planes of weakness designed to accommodate movement due to thermal expansion, contraction, moisture changes, and load-induced stresses, while preventing uncontrolled cracking. Joints ensure the pavement remains structurally sound and serviceable by controlling crack formation, facilitating load transfer, and allowing for...
Actual cant is 8.24 cm for the speed of 60 kmph on a metre gauge curve. Calculate the grade compensation required on the eurve. Sol. Given data: Actual cant = 8.24 cmSpeed, V= 60 kmph For metre gauge, Cant, e= 0.80 V^2/R 8.24 = 0.80 x (60)^2 / RorR= 0.80...
Determine the length of transition curve having 6 degree curvature. The speed of the curve is 60 kmph and cant is 12 cm. Assume the track to be metre gauge. Sol. Given,Degree of curve, D= 6°Speed, V= 60 kmphCant, e= 12 cm We know that, Radius of curve, R =...
