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

Nozzle design loads, Q. Nozzle Design Loads? Minimum nozzle design load...

Q. Nozzle Design Loads? Minimum nozzle design loads shall be in accordance. F = Axial force on centre line of nozzle (lbs); Maximum Transverse Force =1.5F F R = Resultan

Expression for condition of maximum discharge, Drive an mathmatical express...

Drive an mathmatical expression for condition of maximum discharge through the chimney. Dry saturated steam is supplied from a boiler to a steam engine at a pressure of 15 bar.

Preliminary analysis in mining industry, I have selected Mining Industry an...

I have selected Mining Industry and have selected three rival Mining Companies to conduct a preliminary analysis. I have done my bachelor's degree in Mechanical Engineering, I have

Determine the slopes at free end - cantilever beam, Determine the slopes at...

Determine the slopes at free end - cantilever beam: A cantilever beam of length l carries a point load W at a distance l  /4 from free end. Determine the slopes at free end

Define oxidation process, Q. Define Oxidation Process? Oxidation is def...

Q. Define Oxidation Process? Oxidation is defined as a loss of electrons, as when a metal goes from the metallic state to the corroded state. When a metal reacts with oxygen,

Vacuum tube oscillator, i am try to make a vacuum tube oscillator for a lar...

i am try to make a vacuum tube oscillator for a larger project but i need help where to find the supplies for it where can i find them

Characteristics of the secondary circuit, Characteristics of the secondary ...

Characteristics of the secondary circuit The dimensions of the secondary circuit in secondary loop determine to a large extent, the performance of these machines. The secondary

Test, test test teste teste teste tester

test test teste teste teste tester

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