“BACKACTER 1100” World’s strongest dredge

1 backacter 1100 . World's strongest dredge Introduction Yard De Donge designed and build the strongest type of dredger; the backacter 1100. The first very large dedicated marine dipperdredger excavator in the world and the biggest of the BA series. Why did we do this: The Classic approach of an (adapted land) excavator on a dipperdredger had too many compromises. Higher lifting and penetration forces where demanded. Functional desire to put the engines in the hull, cooling, no fuel stop, reduced oil spills, etc. Free choice of dimensions and components. Stronger dredging equipment.

2 Improved design with regard to maritime environment. General Features Gravity filling of the H-pumps. A top-class marine dredger with all drive unit power packs in spaces under deck. Big buckets at a deep dredging depth with highest penetration forces. No fuel stops required anymore, less fuel consumption than a classic excavator. High and extended dumping reach, unloading in even high barges is always possible. Low turbidity dredging machine. Shock-absorbing elastic foundation, integrated in the dredger's deck. All spud and spudcarrier operations from the backacter 's cabin.

3 One hydraulic powerpack system for the backacter , thrusters and spudsystem. Water cooled diesels and water cooled hydraulic system. For working in ambient temperatures till -25OC. No banana shaped boom, but an almost straight one. Donge Flushing Yard , Portugalweg 3, 4455 TZ Nieuwdorp, The Netherlands, Tel. + , Email; Changes without notice, reference to all pages, September 2015 Pages 2 of 10. Technical Highlights PONTOON: Water-cooled diesels, hydraulic pump sets under deck in a well maintainable spacious environment. Easy to observe / check / maintain slewing motors.

4 Marine electric system. Illumination for 24 hours working. Air-conditioning and heating in the cabin. Stainless steel hydraulic lines on the stick and boom (option). All bearings of the dredging equipment centrally greased, via stainless steel lines. By-pass float mode for the dredging equipment during spudcarrier moving. Bucket cylinder rods are protected by sliding steel structure. Triple greasing system. Spacious cabin for dredging and spud operation. Dredging instrumentation fitted in the cabin. Donge Flushing Yard , Portugalweg 3, 4455 TZ Nieuwdorp, The Netherlands, Tel.

5 + , Email; Changes without notice, reference to all pages, September 2015 Pages 3 of 10. General Characteristics of the dredge pontoon Below the main characteristics are given for the BA1100 mounted on a S-type pontoon. BA 1100 mounted on flexible pedestal. IACS classification, Deep Sea, unrestricted towage (high bow). Capable to dredge in max. wave height. Dimensions: x x M. Spud length: 34 m. basic length (or longer). Stabilising spuds:1800 x 1800-mm, square built of special steel. Tilting spuds together with their spudcasing and spudcarrier, through vertically mounted hydraulic cylinders.

6 10-m. stroke spud carrier. Dredging instrumentation with integrated automatic draft levelling Auxiliary engine room at Stb. under high bow deck Accommodation backacter 's diesels at aft with water-cooling and noise friendly Auxiliary crane near backacter . DSF600 crane, 60 tons capacity at 19 M. depth. Painting system (with impressed current system for corrosion protection). Options: - Self-propelled: assisted power - Special fendersystem - Additional auxiliary crane, type DSF 600 with 60 tons cap. See picture. Note: The backacter 1100 can be mounted on a dipperbarge as well.

7 Such dredge has abundant deckspace for the loading of whatever materials. Even combinations with heavy lifting cranes on deck are possible. Donge Flushing Yard , Portugalweg 3, 4455 TZ Nieuwdorp, The Netherlands, Tel. + , Email; Changes without notice, reference to all pages, September 2015 Pages 4 of 10. Dredging Equipment The BA1100 can be executed with the following boom stick combinations: First equipment: Boom : metres. Stick : metres. Bucket : m SAE. ( m3 SAE rockbucket). Max. working depth : metres. Penetration capacity on max depth : tons (approx. 205 tons with 15m3 rockbucket).

8 Second equipment: Boom : metres. Stick : metres. Bucket : SAE ( m3 SAE. rockbucket). Max. working depth : metres. Penetration capacity on max depth : 150 tons approx. (approx. 160 tons with m3. bucket). Third equipment: Boom : metres. Stick : metres. Bucket : SAE. Max. working depth : metres. Penetration capacity on max depth : approx. 150 tons (restricted due to fatique). Fourth equipment Boom : metres. Stick : metres. Bucket : m SAE. Max. working depth : metres. On max. depth, M : approx. 110 tons (fully stretched). Penetration capacity on max depth : approx. 150 tons (till -24 metres).

9 Fifth equipment Boom : metres. Stick : metres. Bucket : SAE. Max. working depth : metres. Penetration capacity at max depth : approx. 80 tons Donge Flushing Yard , Portugalweg 3, 4455 TZ Nieuwdorp, The Netherlands, Tel. + , Email; Changes without notice, reference to all pages, September 2015 Pages 5 of 10. Penetration Diagram of 1st / shortest configuration Donge Flushing Yard , Portugalweg 3, 4455 TZ Nieuwdorp, The Netherlands, Tel. + , Email; Changes without notice, reference to all pages, September 2015 Pages 6 of 10. Estimated Standard Production The Estimated standard production calculation for a type 1100 Donge backacter : At 20 meters depth with a 20-m SAE approx 810 m /hr At 17 meters depth with a 25-m SAE approx 1012 m /hr The above calculation is done with the following assumptions: - Filling degree 90 %.

10 - 45 min. effective production per hour Variables are : when dredging layer thickness is limited : resistance of bottom : barge availability : environmental (current, waves, etc.). : operator, capability / experience, etc. : profile dredging - BA1100 dredging 850 m3 per hour in stiff heavy clay with a 20 m3 SAE bucket - Donge Flushing Yard , Portugalweg 3, 4455 TZ Nieuwdorp, The Netherlands, Tel. + , Email; Changes without notice, reference to all pages, September 2015 Pages 7 of 10. Technical Characteristics BA1100. Installed diesel power : 2 x 1730 kW ( Cummins , type QSK60 DM).