![]() Most modern dredges have computer-assisted onboard instruments. A hydraulic dredge that takes in too much water will be inefficient, and a dredge that takes in too little water will eventually bog down under the volume of incoming sediment, mud or rock. The dredge carefully controls the proportions of water and other material it takes in. Then, atmospheric pressure and the water’s weight combine to force the water and material through a pipe and into a pump. It contains a centrifugal pump that creates a partial vacuum. Hydraulic dredges are cost-effective, mobile, dependable, highly versatile and suitable for challenging conditions.Ī hydraulic dredge works by sucking in water and material from the bottom of the waterway. Hydraulic dredging is the superior solution in many dredging scenarios. That’s why we’ve created this helpful guide to common types of dredges and dredging methods to help you get started. If you’re like many people, though, you may not be sure where to start with dredging. It can also help industrial operations like power plants, water treatment facilities, and mining sites increase their productivity. It can improve fish habitats, correct erosion, deepen ponds and make waterways more navigable. ![]() Doing so removes silt and other undesirable materials from the bottoms of lakes, lagoons, harbors, rivers, and other waterways, improving their functionality and aesthetic appeal. If you deal with a waterway in your business, you may need to dredge it on occasion. It provides an inventory of the dredging equipment and disposal techniques used in the United States and provide guidance for activities associated with new work and maintenance projects.Jump To: Hydraulic Dredging | Mechanical Dredging | Sizing Your Dredge Appropriately This Live Webinar course presents engineering and design guidance for use on new dredging projects as well as maintenance work. It provides an inventory of the dredging equipment and disposal techniques used in the United States and provide guidance for activities associated with new work and maintenance projects.ĮN-02-600W Live Webinar: Dredging and Dredge Material Disposal – 6 PDH This course presents engineering and design guidance for use on new dredging projects as well as maintenance work. If dredging and the management of dredged materials is of interest to you, consider our continuing education courses that address this subject directly.ĮN-02-600 Dredging and Dredged Material Disposal – 6 PDH The cutter heads on this dredger are interchangeable and can be replaced depending on what is being mined. The dredger has a pump that facilitates the transportation of the dredged material via a pipeline ashore. It is fitted with cutter heads which loosen the material to be dredged. The suction pipe is pushed vertically into a sand deposit and it handles the rest. This is a stationary dredger that is used to mine sand. This form of dredging is best when working with fine materials because they can easily be held in suspension. The material is sucked by a centrifugal pump. This type of dredger is used in harbors.ĭredgers in this category lift the loosened material through a pipe system. The shells are mounted on a dragline of the backhoe type. The grab dredger is made of two shells that are operated by wires. This is an immobile dredger that is secured on anchors. It got its name from the fact that it is equipped with an endless chain of buckets that fill while scraping over the bottom. Its movement is facilitated by winches that swing the platform in semi-arcs around the anchor. It is a stationary dredger which is fixed on anchors. This is one of the oldest dredgers in existence. This type of dredging is conducted in a full column of water and does not involve draining the water body. ![]() Mechanical typically dredging takes place at the shoreline or off a barge. It transports the loosened material to the surface through the use of a bucket, clamshell, or other means. Mechanical dredges work by mechanically digging sediment from the bottom surface of a water body. The two main types of dredgers are mechanical and hydraulic dredgers. This classification is dependent on the method by which the specialized equipment transports sediment and other materials. Dredging Methodsĭredging processes can be split into two main groups or types. This brief video presents an overview of various dredging methods including mechanical, hydraulic, and hydrodynamic dredging. Mechanical methods presented include clamshell, backhoe, bucket ladder, and dragline hydraulic dredging methods presented include cutter head and plain suction. This video demonstrates various dredging methods including mechanical dredging, hydraulic dredging, and hydrodynamic dredging.
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