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During his 25 years of troubleshooting on dredging projects Bruno Tack has been confronted with many production related problems that had to be solved on site.
Finding a solution for such problems can be done in two ways: changing the dredging methodology and/or adapting the dredging tool. In case of a trailing suction hopper dredger (TSHD) the tool is the draghead. This is the only part that is in direct contact with the soil. This means that any change on this draghead will have an impact on the production.
In the beginning, quick changes were made on the dragheads on board with the welders of the crew. With gaining experience, bigger changes were made by sending the draghead to local workshops where the heads were adapted to the needs.
And eventually, as many production related problems were recurrent, the final step was to invent, design and build innovative dredging concepts to permanently improve production and ease of use.
Over the years, this has led to some important patented innovations that have proven their value and are still in use.
The main recurrent problems TSHD's are faced with are:
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soils containing boulders or boulder sized obstructions
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soils containing UXO's
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clayey soils
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rock/hard patches
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dense sand
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trenching
For most of those problems, innovative draghead concepts were designed, built and used.
For CSD's, one of the major recurrent problems is the cutting capability of hard rock. To make it possible for a CSD to dredge very hard rock with less cutting power and wear than with a standard cutting head, the milling cutting head was developed.
An overview of the patented and proven concepts can be found on this page.
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