STANDARD & SPECIAL

EQUIPMENT

STANDARD Vs SPECIAL EQUIPMENT

• Relative terms• Manufacturing• Availability in market• Delivery to purchaser• Spare parts• Dispose off• Utilization

AUXILIARY EQUIPMENT

DRAGLINE • A dragline excavator is a piece of heavy equipment used in civil

engineering and surface mining.• Draglines are amongst the largest mobile equipment ever built

on land, and weigh in the vicinity of 2000 metric tonnes, though specimens weighing up to 13,000 metric tonnes have also been constructed.

• Functions– Road– Port construction– Pile driving rigs– Strip-mining operations to move overburden above coal

DRAGLINE• A dragline bucket system consists of a large bucket

which is suspended from a boom • Boom is a large truss-like structure with wire ropes. • The bucket is manoeuvred by means of a number of

ropes and chains. • The hoist rope, powered by large diesel or electric

motors, supports the bucket and hoist-coupler assembly from the boom.

• The dragrope is used to draw the bucket assembly horizontally. By skillful manoeuvre of the hoist and the dragropes the bucket is controlled for various operations.

DRAGLINE EXCAVATOR WITH PILE DRIVER

TYPES OF DRAGLINE

• Crawler type• Wheel mounted• Truck mounted

CLAMSHELL

• Buildings are constructed higher and deeper.• Underground spaces are being used more briskly for – underground shopping malls– subway systems– underground water supplies and sewer systems– underground stockpile bases – underground water reservoirs for emergency– and many other purposes

CLAMSHELL

• Important task is how to dig, hoist, and discharge a large quantity of underground soil safely and economically.

• Underground workability at a greater depth of 70 meters• Improved methods for construction underground work

and civil engineering underground work.

• Efficiency has improved by almost 20% as compared to conventional methods using crane.

FEATURES

• Applicability to underground work at a great depth.

FEATURES

• A single machine unit can cover construction underground work

FEATURES

• Easy operation as compared to crane.

FEATURES

• Capable of transporting whole machine without disassembly

FEATURES

• Improved Safety

RIPPER

• The ripper is the long claw-like device on the back of the bulldozer.

• Rippers can come as a single (single shank/giant ripper) or in groups of two or more (multi shank rippers).

• The ripper shank is fitted with a replaceable tungsten steel alloy tip.

• Ripper lets the ground surface rock be broken into small rubble easy to handle and transport, which can then be removed so grading can take place.

• Agricultural ripping lets rocky or very hard earth (such as podzol hardpan) be broken up so otherwise unploughable land can be farmed.

• Hard earth can be ripped and broken up to allow planting of orchards where trees could not otherwise grow.

Single Shank Ripper

Multi Shank Ripper

DITCHER

• Trench excavation for underground utilities is done in the following sequence:1. A surveyor stakes the route of the trench and details the depth of cut.

2. A bulldozer and motor grader are used to grub, clear, and stabilize the surface.

3. An excavator or backhoe is used to scoop the dirt from the trench and pile it parallel to the trench.

• Dense soils require use of a ditcher.