Let’s Make a Road
Need of work
Very first is when we need to construct a new road, or when we feel to renovate to an old one.
Survey
Take spot levels and coordinates of roadway area by Total station and transfer the data file into highway designing software.
Draw a boundary around points. Draw contour lines. Draw a center line. Convert object to center line.
Designing
Quantification and Estimation of Work
Funds
Tendering
Contract
Planning
Construction Schedule, Methodologies.
Mobilization
Site camps
Layout
Quarries
Plants
Construction
Clearance of Roadway
In filling areas prior to filling clear and grub all the stumps, roots, bushes and trees.
Materials: No material required.
Manpower: For 3500 square meter work in a day.
Description | Unit | No. | Qty |
Supervisor | Hrs | 1 | 1 |
Surveyor | Hrs | 1 | 1 |
Helper | Hrs | 1 | 2 |
Labour | Hrs | 4 | 8 |
Equipment:
Description | Unit | No. | Qty |
Bull-Dozer. 120 H.P | Hrs | 1 | 7 |
Front End Loader. 2.50 Cu.M | Hrs | 1 | 6 |
Dumper 18 T | Hrs | 3 | 6 |
Flat Body Truck 8T (for trees) | Hrs | 1 | 4 |
Restoration of disturbed surface
Restore the disturbed surface by grubbing of above mentioned objects.
Fill the ditches etc and compact that surface upto required degrees 95 percent upto 30 cm (centimeters) and 90 percent upto 75 cm (as determined by AASHTO T-180)
Material: Suitable material for filling is required as AASHTO Class A-1, A-2, A-3, A-4 or A-5 soil as specified in AASHTO M-145.
Manpower: For 3500 square meter work in a day.
Description | Unit | No. | Qty |
Supervisor | Hrs | 1 | 10 |
Surveyor | Hrs | 1 | 2 |
Helper | Hrs | 2 | 2 |
Labour | Hrs | 2 | 8 |
Equipment:
Description | Unit | No. | Qty | Liters / Hour |
Grader. 165 H.P | Hrs | 1. | 4. | 22.00 |
Combination Roller. 18 T | Hrs | 1. | 8. | 12.00 |
Water Tank Tow Type 4000 Litre | Hrs | 3. | 8. | 6.00 |
Filling or Formation of Embankment
Filling upto pavement structure will be done in layers upto 30 cm depth.
Compaction: Each layer will be compacted at required degrees 0 to 30 cm 95 percent, 30 to 75 cm 93, and Over 75 cm 90 Percent of Maximum Dry Density, as determined by AASHTO T-180
Filling of Rock Boulders:
In the case of filling from rock material, use maximum boulders size upto 60 cm, use Bulldozer to spread and set the boulders.
After 60 cm layer of boulders to fill the voids cover it by 20 cm layer of granular material.
Compaction:
Mass of vibrating roll per meter width (Ton /M) | Depth of fill layer (mm) | Number of passes of the roller on each layer |
2.3 – 2.9 | 400 | 5 |
2.9 – 3.6 | 500 | 5 |
2.6 – 4.3 | 600 | 5 |
4.3 – 5.0 | 700 | 5 |
>5.0 | 800 | 5 |
Formation of Embankment on Steep Slope:
Quality Tests: Gradation, CBR, Plasticity, F. D.T.
Material: Suitable soil as AASHTO Class A-1, A-2, A-3, A-4 or A-5 soil as specified in AASHTO M-145.
Quantities of materials:
a)- Suitable earth: 450 cubic meters + add 20% quantity for compaction and wastage.
b)- Water: A trip of tanker of capacity 12000 liters.
Manpower: For 450 cubic meter work in a day.
Description | Unit | No. | Qty |
Site Engineer | Hrs | 1 | 8 |
Foreman Earthwork | Hrs | 1 | 8 |
Supervisor | Hrs | 1 | 8 |
Asst Surveyor | Hrs | 1 | 8 |
Helper | Hrs | 4 | 8 |
Labour | Hrs | 4 | 8 |
Equipment:
Description | Unit | No. | Qty | Liters / Hour |
Bull-Dozer. 120 H.P | Hrs | 1. | 8. | 30.00 |
Front End Loader. 2.50 Cu.M | Hrs | 1. | 6. | 20.00 |
Grader. 165 H.P | Hrs | 1. | 6. | 22.00 |
Combination Roller. 18 T | Hrs | 1. | 8. | 12.00 |
Dumper 18 T | Hrs | 3. | 8. | 22.00 |
Water Tank Bowser Type 12000 Litre | Hrs | 1. | 6. | 12.00 |
Subgrade Preparation
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