Ballast - permanent way, Mechanical Engineering

Assignment Help:

Ballast:

Ballast is the layer of broken stone provided on the formation on which the sleepers rest. The stones are cubical in shape and pass through 50 mm square mesh. The functions of the ballast are:

(a) To distribute the load of traffic to the earthen formation to a safe value.

(b) To act as an elastic bed to absorb the impact of the wheels.

(c) To hold the sleepers firmly in the lateral and longitudinal directions.

(d) To act as a good drainage medium.

(e) To provide a convenient medium to pack the track to the desired levels.

(f) To prevent capillary rise of water which may cause decay/corrosion of sleepers?

(g) To check the growth of vegetation under the track.

The thickness of ballast for a high density BG track is 300 mm, and it is 250 mm for a low density BG track. Figure 4 gives the standard ballast section.

2246_Ballast - permanent way.png

Figure: Standard BG Track Ballast Section


Related Discussions:- Ballast - permanent way

Ejection seat, basic idea in designing of aircraft ejection seat

basic idea in designing of aircraft ejection seat

Electron beam welding-nuclear applications, NUCLEAR APPLICATIONS OF ELECTRO...

NUCLEAR APPLICATIONS OF ELECTRON BEAM WELDING   Electron beam has been applied to the fabrication of fuel elements for pressurised water reactors and the distinct advantages

Define rack cutter generating process, Define Rack Cutter Generating Proces...

Define Rack Cutter Generating Process? The rack cutter generating process is also called shaping process. In this method, the generating cutter has the foam of basic rack for t

Mig / co2 welding, MIG / CO 2 WELDING In MIG / CO 2 welding the feed...

MIG / CO 2 WELDING In MIG / CO 2 welding the feeding of filler wire is machanised. If the welder moves the MIG / CO 2 torch the process is called semi automatic MIG / CO 2

Clutch free play-clutch complaints, Clutch free play : Check for free play ...

Clutch free play : Check for free play of the clutch lever. It should be within 10-20 mm.

What are the points importants during forging design, What are the points t...

What are the points that should be kept in mind during forging design? Some of the points which must be followed while forging design are: > A radial flow of fibers or grain

Define the abrasive jet cutting machines, Define the Abrasive Jet Cutting M...

Define the Abrasive Jet Cutting Machines 1. Abrasive jet cutting machines which are used to cut sheet materials or to remove materials of work piece from a surface by generatin

Organisation set-up - construction of railway line, Organisation set-up: ...

Organisation set-up: The civil engineering department of the Railways is responsible for the maintenance of railway lines. The maintenance organisation consists of Chief Engi

High pressure die casting process, what is the working princile of high pre...

what is the working princile of high preesure die casting process

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd