By

Albin P. Sunny

S7 Civil

Govt. Engg. College Trichur,

Thrissur

Types of Excavation

Equipments

OBJECTIVE: To deliver a high tractive effort (or torque) at slow speeds.

Tractors can be fitted with engineering tools such as dozer blades, buckets, hoes, rippers, etc.

OBJECTIVE: To push large quantities of soil, sand, rubble, or any

other such material

A bulldozer is a crawler (continuous tracked tractor) equipped with a substantial metal plate (known as a blade) and at the rear with a claw-like device (known as a ripper) to loosen densely compacted materials

OBJECTIVE: To remove scraps/dirt efficiently

OBJECTIVE: To create a flat surface during grading process

OBJECTIVE: For digging and loading earth or fragmented rock and for mineral extraction

OBJECTIVE: To lift heavy units in a site and swing it to the required area/position.

ABOUT: The clamshell bucket is a more sophisticated

articulated several-pieces device, including two

elementary buckets associated on a hinged structure

forming a claws-like appendage with an internal volume.

OBJECTIVE: To agitate land and move soil or similar matter from the ground

ABOUT: A dredger is any device, machine, or vessel that is used

to excavate and remove material from the bottom of a body

of water. For example, a scoop attached to the end of a

rope or pole by which a man can draw sediments up from

the bottom of a pond is a dredger.

OBJECTIVE: To dig trenches, especially for laying pipes or cables, for installing drainage, or in preparation for trench warfare

OBJECTIVE: To break-up rocky or hard earth surface, which otherwiseis unploughable

ABOUT: Also known as backhoe, is a piece of excavating equipment

or digger consisting of a digging bucket on the end of a two-

part articulated arm. They are typically mounted on the

back of a tractor or front loader