earthwork equipments used for construction

1. CONSTRUCTION METHODS
AND EQUIPMENT

2.  Physical job condition
 Type of soil
 Specification of machine
 Condition of the machine
 Method of operation

3.  EXCAVATORS
 TRACTORS
 BULLDOZERS
 SHOVELS
 DRAGLINES

4. Under carriage
Crawler
track
cabin
Boom
Hydraulic
ram
Dipper
arm

5.  Hoe type
 Shovel type

6.  Crawler mounted excavator
 Truck mounted excavator
 Excavator mounted on rail

10.  Also known as back-hoe loaders

15.  where digging and dumping are to be taken
beyond the usual reach to a great distance.
 Can haul the excavated material to distance
over 300m.
 Deposit them upto height of 10 to 30m.

16.  Fitted with a short length boom and working
with forward strokes.
 Have the same basic structure
 But different front end attachment

17. 1. Dipper shovel
2. Drag shovel
3. Dragline
4. clamshell

18. 1. dipper shovel -Shovel boom and dipper
stick
2. Drag shovel -Shovel boom, jack boom and
stick
3. Dragline -Crane boom with a fairlead and a
loosely attached bucket
4. Crane boom with a special type of bucket
for a clamshell.

20.  Digging hard rock in querries or ores in
mines.
 The digging is done above the machine base
level.

21. 1. Drag shovel -Shovel boom, jack boom and stick
boom
Stick
Jack boom
Boom line

22.  Helps for digging below the ground level
 Digging for trenches, footings, basements,
etc.
 Digging for hard materials
 Providing close trimming whenever needed
 Where excavated material needed to be
dumped at short distances.

23. Boom point
Hoist
sheave
Hoist
chain
Drag chain

24.  Top boom is known as- the point
 Bottom boom known as –the foot
 The boom is attached to the deck with pin at
foot and supported at the point through the
boom hoist cable.
 Have 3 types of buckets
 Light
 Medium
 Heavy

25.  Digging of underwater excavation
 Can dig below the track level
 Can handle soft materials.

28.  Basically a scarping and pushing unit
 Used for different purpose with some
modifications.
 Can be used upto 100m
 Accordingly they are called
 angle dozer()
 tilt dozer
 tree dozer
push dozer

31.  Angle Dozers work best handling broken and
granular materials, soils and gravel.
 The moldboard pivots about it's center point
to cast materials left or right. Ideal for
digging drainage ditches, backfilling trenches
grading roads.
 This is a good all purpose blade, especially
when equipped with Tilt Cylinders.