What is cutter suction dredging?
A cutter suction dredger cuts hard soil into fragments with a rotating cutter head. The material is sucked up by dredge pumps and discharged to a deposit area through pipelines across sea and land.
What is cutter suction?
A cutter suction dredger is a self-propelled or stationary vessel that uses a rotating cutter head to loosen the material in the hard ground (so-called cutting).
What are the different types of dredges?
The three main types of dredges are mechanical dredges, hydraulic dredges, and airlift dredges.
- Hydraulic Dredge.
- Hopper Dredge.
- Cutter Suction Dredge.
- Mechanical Dredge.
How do dredging ships work?
How does dredging actually work? Modern dredgers have a dredge that removes the material from the bottom or the shore by the water. The boom is lowered into the water or to the shore, where a rotating cutter-bar may help by chewing through the material while a pump moves the material to the ship.
How deep can a dredge go?
Deep Dredging to approximately 150 feet is possible, however, it does present some technical challenges that can be effectively overcome with skill and knowledge. Custom Dredge Works has tremendous experience with engineering long ladder dredges with powerful underwater ladder mounted pumps.
What are dredgers used for?
For dredging, equipment called dredgers is used to remove the deposited sediments from an inlet creek, waterway or ocean floor. The dredging process is a blended essence of the following three independent elements: excavation, transportation of excavated material and then usage or proper disposal of dredged material.
What is hydraulic dredging?
Hydraulic dredging focuses on pumping dredged materials from the excavation site to a processing site where the materials are sifted and sorted. This form of dredge relies on creating a slurry, or a liquidized mixture of rock, dirt, gravel, etc. that is then sucked to a sorting area.
What is a stationary cutter suction dredger?
This type of dredger is capable to dredge all kind of material and is accurate due to their movement around the spud pole. The stationary cutter suction dredger is to distinguished easily from the plain suction dredger by its spud poles, which the last don’t have.
When was the first suction dredger made?
For example, in the fall of 1893 the cutter suction dredger “RAM” was built by the Bucyrus Steam Shovel and dredged company for use on the lower Mississippi river. This dredger was already equipped with an rotating cutter head. (Figure 3.7).
How deep can a suction dredger Dredger go?
Cutter suction dredgers come in a variety of sizes and types with a total installed power ranging from 200 kW on the smallest dredgers to some 30,000 kW for the largest. The dredging depth depends on the size of the dredger. Smaller ones can dredge in less than 2 metres depth, whilst some of the biggest CSDs can reach depths of more than 35 metres.
What is the requi power of a suction dredger?
When, for example, the teeth of d it will be necessary to raise the ladder many times. For medium large cutter suction dredgers a value of 10 m/minutes is often used. The requi power is dredging in the under cutting mode.