Pengerukan (Dredging)

Dredging

Grab dredger
Bakhoe dredger
Dipper dredger
Bucket dredger
Cutter suction dredger
Trailing suction hopper dredger
Dredging wheels

GRAB DREDGER

Grab Dredger

Spoil is lifted from the bottom by a grab
and is discharged into a barge that has been
moored alongside the pontoon.

Grab Dredger

GRAB HOPPER DREDGER

Grab Hopper Dredger

Spoil is lifted up and discharged into
the hopper, which has been integrated
in the dredger.

GRABS

Grabs

BACKHOE DREDGER and DIPPER DREDGER

BACKHOE DREDGER and DIPPER DREDGER

BACKHOE DREDGER

BACKHOE DREDGER

The Backhoe dredger is an excavating dredger that has been mounted on a pontoon.

Backhoe Gredger

Spoil is lifted from the bottom  by a bucket and is discharged into a barge that has been moored alongside.

Backhoe Gredger

The digging-action of the bucket
is towards the dredger.

Backhoe Gredger

When working a face, the bucket penetrates the soil from the top of  the face down.

DIPPER DREDGER

Dipper Dredger

The bucket is lowered and lifted by the hoisting-wires.

Dipper Dredger

Dipper Dredger

The dipper-dredger is often fitted with a submerged drill to disintegrate rocky bottoms.

Dipper Dredger

The dipper-dredger is spudded to keep her in position.

BUCKET DREDGER

Bucket Dredger

Spoil is grabbed by buckets that are mounted on an endless bucket-chain.

Bucket Dredger

Bucket Dredger

The bucket chain is driven by
an upper tumbler and a bottom tumbler.
The latter is raised and lowered by wires.

Bucket Dredger

When the extremity of the ladder
has been lowered to the desired depth,
the spoil is captured by the buckets

Bucket Dredger

A number of buckets perform the
digging-action simultaneously.

CUTTER SUCTION DREDGER

CUTTER HEAD

Cutter Head

The spudded cutter suction dredger

is fitted with a rotating cutterhead.

CUTTER SUCTION DREDGER

Cutter Suction Dredger

With the aid of wires the cutter makes 

a sweep that has the shape of an arc.

Cutter Suction Dredger

The cutterhead disintegrates the soil.

Cutter Suction Dredger

The spoil is then pumped up and discharged through a pipeline

Cutter Suction Dredger

The working-spud serves as a pivoting point

Cutter Suction Dredger

The walking-spud is used to advance the dredger

CUTTERHEADS

Cutterheads

Cutterheads have spiral-shaped bladesattached to a hub.

Detachable teethare 

Detachable teethare attached to theblades to cuthard materials.

The spacing between the teeth is variedaccording to the material to be dredgedThis prevents clogging.

TRAILING SUCTION HOPPER DREDGER

This dredger is a sea-going, self-propelled vessel with a suction pipe that is trailedalong the sea-bed.

SUCTION PIPE

Due to rolling and pitching of the dredger the distance between vessel and bottom may vary.

SWELL COMPENSATOR.

To prevent damage to the vessel, a swell compensator is used to keep the tension on the wires.

VISOR DRAGHEAD

This draghead consists of a pivoted visor and two fixed parts joined by hinges.

Water-jets are aimed into the sea-bedto disintegrate the soil.

The visor draghead is self-adjustingand fitted with shoes that providethe aperture between visor and bottom.

DREDGING WHEELS

ADVANTAGES:

. excellent cutting-properties;

. constant dredging process;

. no blockage by clogging;

. no sensitivity to debris.

BOOSTER STATION

Booster Station

On long pipelines additional booster pumps may be inserted.

Bagikan di Facebook

Bagikan di Twitter

Bagikan di Google+

Bagikan di LinkedIn