The document provides a 43-step checklist for constructing OHE foundations. It includes steps to check approved plans, site conditions, permissions, safety procedures, materials, formwork, concrete mixing and placing, curing, backfilling, cleanup and documentation. Concrete calculations are also provided for a sample M10 mix with a 1:3:6 ratio requiring 4.4 cement bags for 1 cubic meter.

1. VG CHECK LIST FOR OHE FOUNDATION - REV-00
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1. Check Approved LOP, CSD for foundation type, chainage and implantation.
2. Check for type, size and volume from approved Volume Chart, Employment Schedule.
3. Check the site for Location No., rail marking and chainages, type of soil ( Normal,
NBC,BC, SRB, HRB etc .),span on both side, gradient, super elevation, radius of curve,
inside/outside, cess level, embankment/ shoulder width and availability of space, any
cable route indicators, signal post, signal/power/OF cables, location box, LC, bridge,
overline structure, building etc.,
4. Check Permission is obtained in advance from division officers/Staff of TrD,
Engineering, Electrical, S&T and Operating department as applicable.
5. Check Information is given Local Permanent way , signal, telecom and Electrical Staff,
RPF and both side SM/SS before starting work and all staff , supervisor, engineer are
aware of G&S Rules, safety procedures, applicable instructions and JP issued by
division
6. Check If location, type of foundation, ED /super block requirement, step distance &
Implantation are required to be changed as per site condition, please discuss with
design team / RE and carry out the work on approval and record the changes.
7. Check marking for excavation of pit is done as per the drawing.
8. Check and allow the excavation gang to excavate the pit as per the dimensions and
record measurement. Only manual exaction/breaking is done, during excavation care is
to be taken to notice /identify cables if any, is not be damaged. In case of any cable is
noticed inform the same to signal/telecom/electrical staff and after obtaining permission
, protect the cable/s suitably before casting foundation. In case of blasting ( controlled)
proper permission from Railway / statutory authorities is obtained and also ensure it is
done by authorised person in the presence of Railway staff following all safety norms
9. Check no excavated pits is /are kept open without attention, if for any reason it could not
be done the excavated area is cordoned and reflective warning tape is provided. A guard
is available at night shift.
10.Check and ensure concreting is in day light and avoid in night and rain, In the event of
unavoidable circumstances use proper protection and lighting
11.Check the dimensions and allow the concreting gang to start the work
12.Check the Concreting is done under supervision of main contractor engineer/supervisor
Never leave it to labour on site or sub-contractor
13.Check use of PPE and safety of persons working near track to be ensured (whistle
man/Flagman is available to alert the workers in the event of train movement).

2. VG CHECK LIST FOR OHE FOUNDATION - REV-00
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14.Check for adequate manpower, proper equipment and tools (measuring tapes, plumb
bob/plummet, nylon string, mixer machine, vibrator, measurement box, Steel shutters
suitable for the type of foundation), drawing and permits
15.Check the Cement is of approved Make/ brand, Grade, ISI no, batch no & Manufacturing
date and aggregates are from approved quarry
16.Check the size and quality and quantity of coarse aggregates (40 mm), fine aggregates
(4.75 mm) & Cement shall be of OPC as per IS 12269 and quality of water.
17.Check the stability of props/ supports of formwork/shutter
18.Check Correct mix design used as per specifications (i.e. M10 for foundation & M15for
grouting and muffs).
19.Check use of measuring box for cement, fine and coarse aggregates for producing
proper mortar
20.Check mixing of the dry concrete uniformly i.e. Cement, coarse aggregates, fine
aggregates
21. Check the required water is added with measuring container in concrete and is limited
to 30 litres of water for every cement bag (0.6 water/ cement ratio)
22.Check Mixing is done thoroughly for around two minutes to get the homogenous
concrete.
23.Check Concrete is placed within 15 to 20 minutes of pouring water.
24.Check the concrete is poured throughout in an even thickness of 30 to 40 Cm
25.Check proper compaction of the concrete with a vibrator to remove air from the concrete.
If compaction is not well, it creates voids/honeycomb in concrete resulting in reduction
of the strength.
26.Check the pouring of the concrete with the layers of 30 to 40 Cm and compact with
vibrator till the required height/depth of concrete is reached.
27.Check Placement of the scroll (lubricated with oil for easy removal) at exact location by
measuring the setting distance and ensuring embedded length for mast from the top of
foundation is 1.35 metre
28.Check half rotation is carried out of scroll for every 50 Cm height of mortar placed to
enable easy removal of scroll after finishing of foundation
29.Check the surface and edges of concrete is finished after placing of concrete using with
trowels

3. VG CHECK LIST FOR OHE FOUNDATION - REV-00
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30.Check anyone not to walk on the concrete surface till the concrete gets hardened.
31.Check proper curing of concrete after initial setting time to 7 days.
32.Check mast grout hole in the concrete is closed with pit cover
33.Check exposed foundation from formation level shall not be more than 15 cm, proper
backfilling and compaction of earth is done.
34.Check track ballast disturbed during foundation work if any., is set in place
35.Check cleaning of the area like: extra earth, mud, waste concrete, empty cement bags,
trash items (used for food packaging, preparation, consuming), plastic items and
balance aggregates etc
36.Check the levelling /uniform spreading of excavated earth is done
37.Check proper Recording of the, Location Number, date, type of foundation, type of mast,
ED/superblock, actual dimensions, gross and net volumes including number of cement
bags used for concreting, quantity of water, quantity of fine and coarse aggregates,
statement for the use of vibrator during compaction and use of steel shutters in the DPR
and sign with date
38.Check casting of test cubes for every 50 Cu.M or for every two TKM whichever is less
or as per approved quality plan
39.Check samples of aggregates (fine and coarse), and water are collected from the site
periodically (once in a month/ as per approved quality plan) and send it to approved lab
for testing.
40.Check and ensure all details are entered in cube register, sample test register for
aggregates and water
41.Check and ensure the DPR is handed over in PMC/PGCIL office within next two days.
42.Check and enter the site diary is updated with relevant information which will be
subjected to audit
43.Sample Concrete calculation is attached in annexure 1

4. VG CHECK LIST FOR OHE FOUNDATION - REV-00
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Annexure :1
Calculation for M10 Concrete (1:3:6)
During concreting when we place wet concrete, it gets harden after certain standard
time.
30 minutes Initial Setting Time
10 hours Final Setting Time FST
Factor of safety ranging from 1.54 to 1.57 is considered for shrinkage.
For One cubic metre Concrete work is 1+3+6=10
Shrinkage or safety Factor =1.57
Total volume of wet concrete required is: 1.57 Cubic metre
1. Volume of cement = (1/10) x 1.57 = 0.157 Cubic metre; 0.157 x1440 = 226 kg
(4.4 bag of 50 kg cement is required for I cubic metre)
2. Volume of fine aggregate or M. Sand required (>.07 to 4.7 mm) = (3/10) x 1.57
= 0.471 Cubic metre
3. Volume of coarse aggregate required (40mm) = (6/10) x 1.57 = 0.942 Cubic
metre.
4. Water cement ratio is maximum 0.6, for one cubic metre concrete is = 226x0.6
= 135.6 kg or litre.
Use measurement box for correct mixing.
End of Check Sheet