Mumbai University > Civil Engineering > Sem 8 > Construction Engineering

Marks: 10Marks

These versatile equipments are commonly used in construction projects. It is essentially a heavy steel blade which is mounted on the front of a tractor. The heavy blade attached to the tractor pushes the material from one place to another.

Bull dozers are classified on the basis of:

Position of blades:

Bulldozers with blades perpendicular to the direction of movement.

Angle dozers in which the blade is set at an angle with the direction of movement.

Based on mountings:

a) Wheel mounted

b) Crawler mounted.

Based on the control:

a) Cable controlled

b) Hydraulically controlled.

The earth-moving bull dozer consists of a heavy blade of somewhat concave profile. The blade is attached to the body of the tractor with two arms and a supporting frame as shown in the figure.

Applications:

1. For spreading the earth fill,

2. For opening up pilot roads through mountainous and rocky terrains

3. Clearing construction sites

4. Maintaining haul roads

5. Back-filling trenches at construction sites by dragging earth from one place to another