METHOD STATEMENT FOR ROAD WORK
METHOD STATEMENT FOR ROAD WORK
INTRODUCTION
This method statement describes the activities to carry
out Road works as per specifications.
OBJECTIVE
Following documents shall be
considered as reference for execution of the job:
• Approved layout of roads.
• Levels of Roads.
• Location of speed breakers.
1)
Paver Road
MATERIAL
GSB, WMM material,
Concrete paver (M 30 grade, 60mm thick), Sand, cement, stone dust.
APPARATUS/EQUIPMENT:
Cutting machine, Plate compactor, Level pipe,
nylon thread, Trowel, Measuring Tape, Aluminium phanti, Rubber Hammer (For
setting pavers), Vibro roller, Auto level.
HEALTH
AND SAFETY PROVISION:
·
Ensure
Protection equipment, dust mask and hand protection gloves are being used.
·
Engineers and
supervisors to ensure safety measures are being followed.
PREPARATORY
WORK:
·
Identify all work areas that would be
needed for road work.
·
Start point
and finish point to be marked in both directions.
·
Slope in
camber and in longitudinal direction to be pre defined.
·
Surrounding
areas of road work to be free from rubbish or debris.
·
Surface of
WMM should be cleaned with mechanical broom and free from all dirt, scales,
oil, and grease.
·
Management of traffic should be pre defined.
PROCEDURE
1.) Sub-grade
Prepare and consolidate sub grade with vibro roller
8 to 12 T capacity after excavating earth as required. Dress to camber and
grading as per requirement. Consolidate with road roller to get even surface
and compact to get dry density of sub-grade not less than 95% in case of
filling.
2.) Granular
Sub Base
Construct 100 mm thick granular
sub-base-cum-drainage layer with graded materials like natural sand &
crushed gravel / stone and spread in uniform layers with motor-grader on
prepared surface. Use mix in place method with rotator at OMC, and compact with
vibro roller of 8 to 10 T static weight to achieve the desired density.
3.) Wet Mix Macadam – Base
Lay and compact 100 mm thick layer of graded stone
aggregate to wet mix macadam. Lay in uniform layer on sub-base course
compacting with vibro roller to achieve the desired density and finish the
profile by spreading cement 5kg/sqm.
4.) Laying Pavers
25 mm thick, well compacted and leveled layer of
stone dust with Aluminium phanti to be laid on WMM as per desired profile. Lay
the pavers as per design/pattern and compact with rubber hammer to set the
pavers into the stone dust.
5.) Sealing
joints with Sand
Fine graded sand to be spread over surface of
pavers and compacted with plate
compactor to fill the joints properly.
INSPECTION:
·
No undulation
found at the edge of road.
·
Pavers should
be in line.
·
External
paint work should not be done after paver work.
·
Joints are
properly filled up by sand.
2)
Bitumen Road
MATERIAL
GSB, WMM materials, cement,
bituminous concrete, seal coat material.
APPARATUS/EQUIPMENT:
Auto level,
vibro roller, static roller, bitumen road paver & digital thermometer.
HEALTH
AND SAFETY PROVISION:
·
Ensure
Protection equipment dust mask and hand protection gloves are being used.
·
Engineers and
supervisors to ensure safety measures are being followed.
PREPARATORY
WORK:
·
Identify all work areas that would be
needed for road work.
·
Start point
and finish point to be marked in both directions.
·
Slope in
camber and in longitudinal direction to be pre defined.
·
Surrounding
areas of road work to be free from rubbish or debris.
·
Surface of
WMM should be cleaned to make it free from all dirt, scales, oil, and grease.
·
Management of traffic should be pre defined.
PROCEDURE
1.) Sub grade
Prepare and consolidate sub grade with vibro
roller 8 to 12 T capacity after excavating earth as required. Dress to camber
and grading as per requirement. Consolidate with road roller to get even
surface and compact to get dry density of sub-grade not less than 95% in case
of filling.
2.) Granular
Sub Base
Construct 100 mm thick granular
sub-base-cum-drainage layer with graded materials like natural sand &
crushed gravel / stone and spread in uniform layers with motor-grader on
prepared surface. Use mix in place method with rotator at OMC, and compact with
vibro roller of 8 to 10 T static weight to achieve the desired density.
3.) Wet Mix Macadam – Base
Lay and compact 100 mm thick layer of graded stone
aggregate to wet mix macadam. Lay in uniform layer on sub-base course compacting
with vibro roller to achieve the desired density and finish the profile by
spreading cement @5kg/sqm.
4) Primer
coat
Apply primer coat with bitumen emulsion of SS1
grade on prepared surface of granular Base. Spray primer @ 0.75 kg/sqm with
mechanical means.
5)
Tack Coat
Apply tack coat with bitumen emulsion (RS-1) on
the prepared granular surface @ 0.40 kg/sqm with mechanical means.
6)
Dense Graded Bituminous Macadam
1.) Lay Dense Graded Bituminous Macadam of 50 mm thickness
using crushed aggregates of specified grading. Premixed with VG 30 Grade
Bitumen @ 5% (% by weight of total mix) and lime filler @ 2% (% by weight of
Aggregate) prepared in a Hot Mix Plant, transport hot mix to work site. Lay
with a hydrostatic paver finisher to the required grade, rolling with smooth
wheeled vibro roller to achieve the desired compaction. Mixing of DBM material
at hot mix plant 150°C– 165°C. Temperature of DBM when material is laying 140°C
minimum and rolling temperature must be completed before the material cools to
90°C minimum
Lay Seal
coat of 5mm thickness, consisting of premixed fine aggregate (passing 2.36 mm
and retained on 180 micron sieve) with bitumen using 7% (% by weight of
aggregate) of bitumen of grade VG-30 prepared in a Hot Mix Plant transport the
hot mix to work site. Lay with a hydrostatic paver finisher to the required
grade, rolling with smooth wheeled vibro roller to achieve the desired
compaction. Temperature will be remain same as BC process.
INSPECTION:
- Thickness of DBM layer should be check by
gauge.
- Temperature of DBM when material is
laying 140°C and rolling temperature must be completed
before the material cools to 90°C minimum
- Mixing of DBM material at hot mix plant 150°C – 165°C.
- Sample of DBM should be collect from site
during work and test of bitumen content in sample should be check in authorized
laboratory.
- 12–13 hours gap to be maintained between
primer coat and tack coat.
- Camber and level of road to be checked before
GSB.
- Dry density minimum 95% in sub grade in
filling earth to be checked.
- Movement on road to be allowed after 3 hours
of final rolling.
Comments