Post-trenching
in Shore Approach

SEA’s Post-Trenching Machines can also be used in shore approach areas, in very hard soil (silty rock, coral, calcarenite and cemented sand), without having to resort to the support of a cofferdam.
The use of the post-trenching method in shore approach areas is the optimal solution for the burial of underwater pipelines as it offers the following advantages:

TECHNICAL BENEFITS:
Thanks to its working method, SEA’s machines operate only along the route, creating a limited linear trench, without the danger of creating free-span.

ENVIRONMENTAL BENEFITS:
Thanks to the technical characteristics of SEA's machines, post-trenching causes less environmental impact than the construction of a cofferdam, greatly reducing the trench width by limiting it to the diameter of the pipeline. This will also facilitate the natural back-filling phase of the trench itself with the use of the excavated material, without the need for outsourcing.

FINANCIAL BENEFITS:
Post-trenching proves itself as faster and less invasive than building a cofferdam, thus reducing project times and costs. Furthermore, being independent from the laying operations, it allows a reduction in project risks and can be carried out at later more favorable times, without causing the trench to fill itself
after the installation of the product.
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