Quality Assurance Handbook for Rural Roads Volume-I - pmgsy

3. Section-1900
3. Any objects which can interfere with water flow must be removed.
4. Repair drain erosion by replacing and backfilling the lost soil. In case of recurring problems of
erosion, permanent measures like masonry lining should be considered.
5. Check for any settled or damaged precast drain sections or loose stone, which should be removed
and underlying soil compacted. After addition of fresh soils, the levels should be corrected and
then only fresh stones or precast drain should be laid.
6. For vegetation control, tractor-towed mower can be employed where available and as an alternative
hand-guided mower can also be used.
7. For erosion control, turfing (grass sodding) is suitable when climate and soil conditions are
favourable. Seek advice of local agriculture department on topsoil required, seed type and rate of
spread, fertilizer types and rate of spread and most favourable season and weather for seeding.
Suitable mulch like jute netting can be provided for preventing the seeds from getting washed
away before the seeds sprout.
B. Quality control requirements
1. Materials
All soils and other materials used for maintenance should satisfy all quality requirements for use
in shoulders, along slopes and in roadside ditches/drains, as laid down for original construction.
2. Surface Finish
All maintenance works must be carried out to the finished surface standards laid down in original
designs.
3. Camber/Cross Fall/Side Slopes
Check that the maintenance work has been carried out to the specified camber/cross-section and
side slopes.
C. Do’s and Don’ts
Do’s Don’ts
1. Do carry out suitable benching of the rain cuts to be
restored, as per the specified procedure.
2. The deficiency in shoulder thickness should be made
up in layers, ensuring the optimum moisture for
compaction and achieving the specified density.
3. The compacted layers on the shoulder should be
finished to the required cross-fall.
4. Do make provisions to maintain sufficient supply of
tarpaulin or other water proof cloth during
placement of concrete when rain is expected.
5 While reshaping/regrading and deepening of
ditches/drains, carefully check and correct the invert
level and grading.
6. Before turfing or grass-seeding, get the needed
advice from the local agriculture department.
1. Do not use any soil for restoring rain cuts, which does
not meet the requirements for suitability as a fill
material.
2. Do not allow any obstructions to remain on the
shoulders
3. Do not spread the excess material over the road surface
while reshaping, regarding and deepening of ditches.
4. Do not attempt turfing or seeding on soil type, which
will not sustain plant growth, without providing
topsoil.
5. Do not use any chemical methods or resort to burning
to control roadside vegetation.
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