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

Belt and rope friction, what is the effect of a warm groove on the performa...

what is the effect of a warm groove on the performance of the V belt

Material science, what is the main process to get steel hard

what is the main process to get steel hard

Law of Parallelogram of Forces, To finding ? in Law of parallelogarm forces...

To finding ? in Law of parallelogarm forces We take Q sina(Along Vertical Side) & Q cosa(Along Horizontal Side) I didn''t get that point Q sina & Q cosa how it derived? Can you

Tensile strain, T ensil e Strain: When the tensile load acts on body...

T ensil e Strain: When the tensile load acts on body then there will be decrease in cross sectional area and an increase in length of body. The ratio of increase in length t

The progressive liberalization , The progressive liberalization of the nor...

The progressive liberalization of the norms for foreign investment and import of technology appear to have benefited the automobile sector with production of total vehicles increa

Determine the force to pull box along a level surface, Determine the force ...

Determine the force to pull box along a level surface: A metal box having weight 10KN is pulled along a level surface at the uniform speed by applying horizontal force of 350

Thermodynamics, microscopic and macroscopic view points

microscopic and macroscopic view points

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