5 BALLAST 34 5 2Ballast profile Ballast sections

5 BALLAST 34 5. 2_Ballast profile - Ballast sections for straight and curves on double lines, for BG/MG/NG with fish plated track, SWR and LWR Periods 2 1

Ballast Profile/Section/Depth of Cushion: l Ballast profile: -The following ballast profiles shall be provided for the various groups of track for LWR/CWR and other than LWR/CWR as given in Annexure - 2/2 A, 2/2 B & 2/2 C of IRPWM. The approximate quantity of ballast required per metre run of track for standard ballast sections has also been indicated in the sketch. 2

Note: l (i) Minimum Formation width to be ensured for new works/alteration to existing works in embankment and in cutting (excluding side drains), as also indicated in the sketch of Annexure - 2/2 A, 2/2 B & 2/2 C ¡ For single line straight track – 7850 mm o For double line straight track – 13160 mm l (ii) On curves, additional formation width over (i) above, shall have to be ensured as given below: l (a) Increase due to extra widening of ballast shoulder on outer side of curves in both single/double line, as indicated in sketch of Annexure - 2/2 A, 2/2 B & 2/2 C l (b) Increase due to requirement of extra clearances on curves as stipulated in the Appendix to the IRSOD-(BG). 3

Contd. . l (iii) Increase in formation width on curves will be decided after taking into account the increase mentioned in (a) & (b) above. l (iv) Minimum Cess width of 90 cm shall also have to be ensured for both straight track & on curves, along with ensuring minimum Formation width as specified for Single/Double line including additional formation width on curves as described above. l (v) If even after provision of additional formation width, cess width on the outer side of curves reduces below 90 cm on account of increased ballast width due to super elevation, formation width shall be increased further, over and above additional width as stipulated in Note (ii) above, to meet the requirement of minimum cess width of 90 cm 4

BALLAST PROFILE FOR LWR TRACK (single line BG) Annexure – 2/2 A of IRPWM

Gauge Type of Sleeper 1676 mm PRC A B 250 300 350 350 C* D E* F F 1 H 500 2693 2851 7850 646 500 2772 2930 7850 698 500 2851 3009 7850 751 Quantity of Ballast per meter in Straight Curved Track (M 3) 2. 030 2. 120 2. 304 2. 585 2. 401 2. 690 Note : 1. Depth of ballast cushion should be provided as per Para 212(2) of IRPWM. 2. Cross-Slope of 1 in 30 shall be provided for New Works. 3. Minimum Formation width of 7850 mm shall be ensured for new works in both embankment and in cuttings (excluding side drains). 4. Suitable dwarf walls shall be provided in case of cuttings, if necessary for retaining ballast. 5. *On outer side of curves only. 6. Super elevation has not been considered in calculation of ballast quantity for curved track. 7. The cess width on existing track is to be increased on programmed basis wherever required so that minimum cess width as per side slope given above is ensured. 8. All dimensions are in mm.

Ballast profile for BG (Other than LWR/CWR) Annexure – 2/2 B of IRPWM

Quantity of Ballast per Meter S. No. Depth of Ballast Cushion 1 250 mm On Straight and Curves of Radius sharper Radius flatter than 600 M 1. 769 M 3 1. 820 M 3 2 300 mm 2. 022 M 3 2. 078 M 3 3 350 mm 2. 282 M 3 2. 344 M 3 Note : 1. In the case of ordinary fish plated track: * To be increased on the outside of curves to 400 mm in the case of curves sharper than 600 M radius. 2. In short welded panel Track* To be increased to 400 mm on outside of all curves, flatter than 875 M radius and to 450 mm, in the case of curves sharper than 875 M radius. 3. * To be increased to 550 mm on the outside of turn in curves of turnouts in passenger yards. 4. Depth of Ballast cushion should be provided as per. Para 212(2) of IRPWM. 5. Minimum Formation width of 7850 mm shall be ensured for new works in both embankment and in cuttings (excluding side drains). 6. Super elevation has not been considered in calculation of ballast quantity for curved track. 7. The cess width on existing track is to be increased on programmed basis wherever required so that minimum cess width as per side slope given above is ensured.

Ballast profile for LWR Track(Double line BG) Annexure-2/2 C

• Note: 1. Depth of ballast cushion should be provided as per Para 212(2) of IRPWM. 2. Cross-Slope of 1 in 30 shall be provided for New Works. 3. Minimum Formation width of 13160 mm shall be ensured for New works in both embankment and in cuttings (excluding side drains). 4. In doubling work of existing lines, cross-slope of 1 in 40 in existing old formation need not be disturbed. However, the cross slope of 1 in 30 shall be provided in widened formation width, newly constructed for doubling. 5. Suitable dwarf walls shall be provided in case of cuttings, if necessary, for retaining ballast. 6. *On outer side of curves only. 7. Super elevation has not been considered in calculating various dimensions. 8. The cess width on existing track is to be increased on programmed basis wherever required so that minimum cess width as per side slope given above is ensured. 9. All dimensions are in mm.

Depths of Ballast Cushion– The minimum depth of the ballast cushion below the bottom of the sleepers at the rail seat for BG should be as under– Minimum depth of the ballast In case of cushion for all routes Track Renewals (CTR and TSR) 300 mm (Where possible 350 mm shall be provided) All Doubling, Gauge Conversion 350 mm & New Line construction works Loop Lines 250 mm 11

Depths of Ballast Cushion– For higher speed Speed above 110 Speed above 130 Speed Kmph and up to 130 Kmph 160 Kmph Ballast Total 350 clean Cushion Total 300 clean 150 in mm 12

Sidings– Private and For permissible speed up to 50 Kmph. Other For permissible speed more than 50 Sidings Kmph 300 mm 350 mm Note – (1) Minimum depth of clean ballast cushion at all times for mechanised maintenance under the rail seat of the PSC sleepers shall not be less than 150 mm. (2) Increase in ballast cushion to make up the recommended depth will be carried out during complete track renewal, through sleeper renewal or programmed deep screening of track. (3) Special attention should be given at locations such as bridge, level crossing and tunnel approaches so as to ensure full ballast 13 section for six rail lengths on either side.

Ballast profile for MG(Other than LWR/CWR)

Ballast profile for NG(Other than LWR/CWR)

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