Mirafi and Geotube Technology combine for demanding, large-scale dewatering project in Brazil.
Geotechnical projects come in a variety of sizes and scope — each presenting unique challenges. Many times these challenges are multi-faceted and require engineers to apply different disciplines and use a mix of products and methodologies to solve their project issues.
TenCate, manufacturer of Geotubes materials, is equipped with the capabilities and knowledge to address these multiple geotechnical issues. TenCate develops and produces materials that function to increase performance, reduce cost, and deliver measurable results by working with our customers to provide advanced solutions.
As the world's leading provider of woven and non-woven geosynthetics and industrial fabrics, TenCate holds a deep knowledge of materials and understands engineering and product innovation. The corporation often combines the efforts of multiple company divisions to design the best methods for a geotechnical project.
We take a hands-on, collaborative approach to providing answers and solutions, said Mark Gunzenhauser, Vice President Sales for TenCate Geosystems and South America. The combined capabilities of TenCate's multiple company divisions serve as a distinct differentiation in the industry. We're truly a one-stop shop for our customers.
Example of Project Collaboration
TenCate recently completed a project with a contractor in Brazil. The project required the construction of two lined Geotube dewatering cells that contain three stacked layers of 120-fl circumference x 200-ft. long GT500 Geotube units. The total height of the finished project measures 25-ft. of filled Geotube units.
This site would be subject to an overburden of up to 2,400 lb./ft. when completed. The planned area of the dewatering cells was to be constructed over an area that was created more than 60 years ago when dredge spoils were deposited to create an island. The contractor's challenge was how best to design and construct stable dewatering cells that would not be subject to bearing capacity failure or deferential settlement due to extreme overburden load of the filled Geotube2 units. If a deep subsurface failure occurred, the resulting deferential settlement could rupture the cells' impermeable liner system leading to a catastrophic loss of heavy metals contaminated sediments contained within the Geotube units.
TenCate provided the contractor with support and guidance in three areas:
- Technical assistance in the analysis of the potential failures.
- Methodologies to model the many variables.
- Products that could be incorporated into safe designs to provide project security.
'TenCate Geosynthetics has spent the past 60 years developing proprietary products and design methodologies to aid engineers and contractors to solve the multitude of problems that they routinely face,' said Tom Stephens, Director of South American Operations for TenCate!U Geosynthetics . 'This specific project is a perfect example of how TenCate can combine corporate capabilities to solve the most challenging problems.'
The project planning and development involved a preliminary four-step process. First, TenCate engineers provided settlement and bearing capacity analysis using the overburden calculations. This allows the engineers to calculate the settlement of Geotube structures when installed over high-moisture content sub-grade soils.