This powder along with dust, sand ashes from locomotive form an impervious layer and prevent the ease flow of water through ballast. The ballast are constantly press in the formation. This reduces the quantity of the ballast and also the elasticity of the railway track is affected. The ballast is cleaned regularly by means of screening.
Adjustable ballast cleaning screen to allow aggregate size setting from 5/8-inch to 1-inch for screening material. Distribute returned ballast to either side of the track in tangent or curved track. Regulate/plow returned ballast to fit within standard track cross-section (capable
(3) In case of deep screening, assessment of ballast required for recoupment and providing standard section should be made by deep screening the ballast section to the full depth in a rail length for two to three sleepers at every V2 to 1 km. In this case screening is done under the sleepers as well.
Similar to the laboratory studies, a 40 cm-wide ballast shoulder was implemented in the test track. The geogrid used in these tests was 4 m wide, and it was spread out along the required lengths as mentioned previously. Fig. 8 demonstrates the different parts of the test track along with the location of geogrids.
Rail ballast typically sits on a layer of roadbase type material, ... is most important, since this ballast shoulder is, for the most part, the only thing restraining lateral movement of the track. ... In the case of ballast the test is used to calculate volumes required as material is mostly delivered to a project by rail .
Dec 22, 2017· Shoulder Ballast Cleaning Machine Working on Phulera to Rewari Railway Track. See the complete working procedure of the machine and learn that how railway works.
A firm foundation for railroad performance. ... Loram's mission-critical shoulder ballast cleaning, undercutting and excavating maintenance systems, coupled with ditching and drainage solutions deliver strong ROI and benefits to the health and performance of any railroad. Our inspection services, experienced teams and track record of safety ...
Progress Rail Services' newest shoulder ballast cleaner is the KSC2000, which features a single shaker screen design capable of cleaning 2,900 tons of ballast per hour.
ballast shoulder cleaning operations, and periodically over time after shoulder cleaning. Eight sets of samples were collected over a period of 2 years. Sieve analysis immediately before and after ballast shoulder cleaning shows that the ballast shoulder cleaning process was effective in removing fines and restoring desirable drainage properties.
Loram High Performance Shoulder Ballast Cleaner (SBC) as the exclusive method of ballast maintenance. Over 800 km of main line has been cleaned with the SBC with minimal track occupancy (less than 400 hours). 2. RAILWAY BALLAST The railway ballast section is a layer of stones
Max.digging depth≥850mm(under railway surface) Screening efficiency: The cleaned ballast returned to the shoulders shall not exceed 3% fines when operating at the rated capacity of 1200m 3 /h with initial ballast bed contamination less than 30% fines. And the usable ballast contained in the waste shall not exceed 5% in weight.
It also helps with drainage, so rain water can drain away rather than pooling, and with preventing vegetation growth, which could destabilise the track and be a hazard for anyone working on the railway. The ballast is packed up to, between and around the sleepers, with a 'shoulder' of ballast piled up at either end to resist side-to-side ...
May 26, 2017· A firm foundation is paramount to proper track performance and proper drainage is key to maintaining that foundation. ... Loram High Performance Shoulder Ballast Cleaner ... Shoulder ballast ...
A second consideration is the slope of the ballast shoulder away from the track, particularly on an embankment or where the ballast bed is raised above the natural ground so that the shoulder slope continues below sleeper soffit level. There appears to be no international consensus regarding the ballast shoulder slope. In Germany a slope
Shoulder, or ballast cleaners are complicated looking machines that perform a basic but very important task, keeping ballast free from debris and dirt so it can most efficiently drain water away from the track structure (ties and rails).
the life cycle of ballast. A laboratory test procedure was developed to quantify the degradation ... degradation compared with 41% of the fouling material on the British Railway system being from ballast degradation (2). The portion of ballast degradation due to tamping has been studied previously with wide
Adjustable ballast cleaning screen to allow aggregate size setting from 5/8-inch to 1-inch for screening material. Distribute returned ballast to either side of the track in tangent or curved track. Regulate/plow returned ballast to fit within standard track cross-section (capable
Table 6-8. Recommended Ballast Gradations. Amounts Finer Than Each Sieve (Square Opening) Nominal Size. Percent by Weight. Square Opening. ... Figures 6-1 through 6-7 show standard ballast shoulder widths and side slopes. In. finished or resurfaced track, the top of ballast may be up to 1 in. below the top of the tie, but never above. the top ...
adequate lateral track stability with smaller ballast shoulder widths than those specified in Table 4.1. [8] The resistance to buckling forces may be enhanced by the provision of a ballast shoulder surcharge (windrow). [9] Use of the guidelines in this Clause will provide a design ballast shoulder .
adequate lateral track stability with smaller ballast shoulder widths than those specified in Table 4.1. [8] The resistance to buckling forces may be enhanced by the provision of a ballast shoulder surcharge (windrow). [9] Use of the guidelines in this Clause will provide a design ballast shoulder .
Deep Screening of Ballast . Deep screening of the ballast is done to ensure that a clean ballast cushion of the required depth is available below the lower half of the sleepers, which is necessary for providing the proper drainage and elasticity to the track.
shoulder cleaning process was highly effective in removing fines and restoring desirable shoulder ballast support and drainage properties. Further periodic analysis also supports that the fines in the center of the track and along the shoulders tend to move outward and downward during the test with the percentage of fines in the cleaned ...
Jan 31, 2010· The fastenings shall not be covered with ballast. 7.9 Jointed track shall be fully ballasted so that the vertical faces of the sleepers, timbers or bearers are not visible. Ballast shoulders for jointed track should be level with the top surface of the sleeper ends.
SPECIAL SPECIFICATION 4391 Ballasted Track Construction 1. Description. This Item shall govern for the construction of ballasted track on constructed trackbed. Ballasted track construction includes, but is not limited to, placing ballast, distributing and lining ties, installing and field welding running rail, raising and lining track,
