Its about drag line introduction , types ,methods and its working with some images and its very helpful in education and engineering students who have projected on construction equipment base topics.

1. Advanced Construction & Equipments (2160601)
Submitted to :-
Proff. Purvesh Raval
Submitted by :-
Parth Maheta (141210106020)
1

2. CONTENT :-
 Introduction
 Working
 Applications
 Factors Affecting
 Some Types
 Advantages & Disadvantages
2

3. INTRODUCTION
 Dragline falls in heavy equipment’s category.
 Dragline excavator is used for civil engineering projects
and surface mining.
 Dragline is the largest equipment ever built on this planet.
It has the ability to excavate very deep down the earth.
 Word drag is used because it has the ability to drag
material at far distance from the machine.
3

4.  Dragline consists of drag cable, large bucket, boom, hoist
cable, drag chain and driving motors.
DRAGLINE EXCAVATOR
4

5. WORKING OF DRAGLINE
 The bucket is lowered in fully dumped position, released
both hoist & drag cable, till it rest on ground with the teeth
digging into earth.
 The hoist cable is slackened slightly and then the drag pull
is applied . This action fills in earth and bucket takes
horizontal position. It is then hoisted.
 When dumping height is attained, the boom is swung to the
position of dumping and the drag brake is released. This
will dump the load of bucket.
 The boom is swung back to digging position and the same
cycles are proceed.
5

6. WORKING OF DRAGLINE
6

7. APPLICATIONS
 Most suitable for digging softer material.
 Useful for excavating trenches.
 Mostly used in excavating canals & embankments.
 Suitable for loose soils, marshy land and areas containing
water.
7

8. FACTORS AFFECTING ON DRAGLINE
 Size & Type of Bucket :-
Light Bucket : for loose, dry soils, sand & gravel.
Medium: for clays & compacted gravel.
Heavy : for hard & broken rocks.
 Length of Boom :-
 Longer boom with smaller bucket increased
digging rate.
It is possible of dispose off the earth in one operation so
cost and time is saved.
 Type of material :-
 loose, dry & soft soil => Output More.
 Hard & Tough soil => Output Less.
8

9. FACTORS AFFECTING ON DRAGLINE
 Angle of Swing :- The time cycle is directly proportional to
angle of swing. If Angle of swing increases, output
decreases.
 Depth of cut :- If work at optimum depth and A.O.S=90,
output will be max.
 optimum depth depends on type of soil &
size of bucket, if bucket size is increase, optimum depth of
cut also increases.
 Size of Hauling unit :- The hauling units (trucks) of desired
sizes should be made available, to avoid delay, to get more
output.
 Skill of Operator
9

10. TYPES OF DRAGLINES
 Crawler mounted draglines :-
 low travel speed.
 suitable for soft ground.
 Wheel mounted draglines :-
 high travel speed.
 suitable for firm ground.
 Truck mounted draglines :-
 same as wheel mounted.
10

11. ADVANTAGES & DISADVANTAGES OF DRAGLINE
 ADVANTAGES it can work on natural ground while
power shovel take a pit or trench.
 hauling units do not have to go into trench
while using dragline.
 range of working is more than power
shovel.
 excavated material disposed off in one
operation.
 DISADVANTAGES  it has less digging force than P.S
 output is less than as compared to
shovel.
11

12. Thank You
12