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

Calculate the cutting speed, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Opresion reserch, ppt of appling queuing model in railwy reservation

ppt of appling queuing model in railwy reservation

Nature of bending stress, According to the explanation, why reverse will ha...

According to the explanation, why reverse will happen in the case of cantilevers? ( that is, tensile stresses will be induced in upper layers and compressive stresses will be induc

Determine the distance of application of the load, Determine the distance o...

Determine the distance of application of the load: A rigid bar of negligible weight transmits a load W to a combination of 3 springs as illustrated in Figure. The three spring

Plate oil separator, Plate oil Separator: Check for plate oil separator fi...

Plate oil Separator: Check for plate oil separator fitment.

Discover the increase in pressure, Discover the increase in pressure: ...

Discover the increase in pressure: A copper tube of 50 mm diameter and 1200 mm length contains a thickness of 1.2 mm along closed ends. This is filled with water at atmospheri

Horizontal curves - railways, Horizontal Curves - Railways In railwa...

Horizontal Curves - Railways In railway engineering, the horizontal curve is defined by its degree as well as by its radius. The degree is the angle subtended at the centre

Corrosion assessment for mvc evaporator system, Q. Corrosion Assessment for...

Q. Corrosion Assessment for MVC Evaporator System? Typical evaporator systems in SAGD plants operate under extremely severe corrosive conditions due to high chloride content, e

The auto component sector-automobiles industry growth , The auto component ...

The auto component sector has also posted significant growth of 20 percent in 2003-04, and achieved a sales turnover of Rs. 30,640 crore (US$ 6.7 billion). Further, there is a pote

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