The document provides an overview of dragline excavators used in civil engineering and surface mining, detailing their working mechanism, applications, and factors affecting performance. It outlines the types of draglines, including crawler, wheel, and truck mounted, as well as their advantages, such as efficient operation on natural ground, and disadvantages like lower digging force compared to power shovels. Overall, the document serves as a comprehensive guide to understanding dragline equipment.

1. Advanced Construction & Equipments (2160601)
Submitted to :-
Proff. Purvesh Raval
Submitted by :-
Parth Maheta (141210106020)
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2. CONTENT :-
 Introduction
 Working
 Applications
 Factors Affecting
 Some Types
 Advantages & Disadvantages
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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.
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4.  Dragline consists of drag cable, large bucket, boom, hoist
cable, drag chain and driving motors.
DRAGLINE EXCAVATOR
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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.
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6. WORKING OF DRAGLINE
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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.
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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.
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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
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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.
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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.
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12. Thank You
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