EARTH WORKS ( Road Constructions )

Clearing and Grubbing

The stage of development in which vegetation is cleared from land (clearing) and a root rake or similar device employed to remove roots remaining in the soil (grubbing)

—Clearing and Grubbing inclusive of backfilling holes and trenches caused by removal of stumps
—Removal of trees
—Removal of overhanging branches of girth
—Removal of Structures and obstruction

Machineries

—Excavator or JCB
—Tipper

Road way Excavation

Road way Excavation would be carried out according to the designed cross sections and this work shall consists the excavation of soil, hard rock and also soft rock.

Why Sub Grade Preparation is Important ?
The overall strength and performance of a pavement is dependent not only upon its design but also on the load-bearing capacity of the sub-grade soil. Thus, anything that can be done to increase the load-bearing capacity (or structural support) of the sub-grade soil will most likely improve the pavement load-bearing capacity and thus, pavement strength and performance.

Excavation Method

1.Clearing and grabbing ,road way excavation & Embankment cutting was done simultaneously.
2.Excavated sub-grade surface was leveled end sealed.
3. Surface was wetted using water bowser.
4.Compaction was done when the surface is ready.
5.Sub-grade top levels were taken jointly with consultant

Machineries

1.Excavator
2.Roller
3.Tipper

Embankment Filling

An embankment usually refers to an earthen structure that is used to raise the elevation of a roadway or railway above the elevation of the surrounding area

 

Sub Base Filling

It is layer of granular material provided above sub-grade generally natural gravel

Layering Method

1.Embankment filling up to carriage way sub grade level
2.Sub base filling up to sub base top layer
3.Embankment filling up to embankment top layer

Compaction Method

1.Sub base layer was sealed
2.Lay embankment layer
3.Adding sufficient water for both layers
4.Water content was checked.
5. Compaction both layers using roller

Machines

1.JCB
2.Bob Cat
3.Roller (2.5 T)
4.Roller ( 5 T)
5.Water Bowser (14000 L)
6.Rammer

 

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