Embankment Definition and Road Embankment Process( Guide)
A road, railway line, dam or cannel is normally raised onto an embankment made of earth to avoid a change in level required by the terrain. The alternatives are either to have an unacceptable changing level or detour to follow a control.
Embankments are often constructed using materials obtained from cutting. Embankments should be constructed using suitable materials to provide adequate support to the formation and long term stability.
The embankment is defined as the height of the construction required to match the subgrade bottom at any given location.
The embankment height is generally calculated as the difference in levels of finished road level and the original ground level, the subgrade, and the crust thickness at any given location.
The bed is made ready to receive the fresh material for new construction by sprinkling water and doing a plane pass.
Care should be taken to collect the material from the approved borrow areas for better performance.
If there’s a change in the border area, then the same needs to be immediately intimated to the central lab to collect samples and testing.
Material suitable for earthwork has a proctor value of 1.52 g /cc for a height of 3 m and 1.65 g per cc for more than 3 m fill in embankment construction.
Soil having the liquid limit value of 50% plasticity in That’s not more than 25 free swell index limited to 50% and Maxim particle size 75 is suitable for the embankment work.
The first required quantity is calculated based on the layer thickness and the permit on in length.
Depending on the complexion factor, the loose thickness is considered for the dumping of soil.
The calculated quantity of earth required to fill is dumped using the dump truck. Supervisors will guide the dumping of materials in the bed to be easy for the grading and removal of vegetation, if any, in the soil.
Constant watch on the number of trips jumped on the bed will ensure the compacted soil’s thickness and be maintained. Generally, we prefer to have a 250-layer, compacted thickness to be maintained in the embankment.
The moment of vehicles in the forward and backward directions, which jerk we’re lifting the dump bed, will ensure the proper unloading of the material from the truck during the process of construction of the embankment.
The hydraulics were used in lifting their dumb bed to the extent required so that the tailgate opens automatically and allows the discharge of the material on the bed.
The natural moisture content available shall be tested using the rapid moisture meter while dumping the soil so that additional water, if necessary, can be sprinkled to achieves the AMC during the rolling.
It is required to maintain the correct moisture level during compaction as with the increasing moisture, the density increases and then decreases after achieving the OMC for a particular soil.
The roots and vegetation shall be removed from the bed before rolling, and finishing Particles bigger than 75 shall be removed from the bed if they’re not being crushed to smaller size during the process of rolling.
The hips shall be uniformly spread by the dozer to achieve the required thickness.
The dozed materials can be graded to maintain the level and the camber as for the design drawings.
The water sprinkled during this using the sprayer fixed to the water tanker.
Water is uniformly spread to achieve the required moisture for optimum compaction; the moisture shall always be within the range OMC plus one and minus 2%.
Grading is done using the motor grader to spread the material uniformly, maintaining the line and levels as further drawing.
In the angle tilt or pitch and height of the greater blades can be adjusted to achieve the surface’s position grading.
In civil engineering, the greatest purpose is to finish the grade to define our set precisely in the bed at the required level.
A more recent innovation is the out-fitting of graders with great control technologies such as those manufactured by TopCon Positioning system, simple navigation, Laker geosystems, off microfiche exercise, great control, and fortunate potentially take this construction.
Manufacturers such as Caterpillar have also begun to integrate these technologies into their machine out of the factory for the best results.
It is always advisable to come back to the surface at the optimum moisture content as maxim density can be achieved at this moisture level.
As the moisture dries up, even the highest compactor effort will not result in meeting the requirements that failing the surface because FDD reduces with the reduction in the moisture during compaction.
Does the ratio every day by empty results in less compassion than required in the field, even after compacting.
The vegetation is, if any, shall be removed from the bed manually for better quality.
As the moisture dries up, even the highest compacted offers will not result in meeting the requirements that are failing the surface.
Visually no impression of the tires visible on the bed, then the bed shall be considered as well compacted.
Localized patches of impressions indicate the possibility of the region’s entrapped air and shall be removed before proceeding to the next layer.