• Who we are
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  • Who we are
  • What we do
  • Projects
  • Career
  • Contact
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Who we are

Operating internationally with Swiss roots, WALO is a family-owned business now being led by the fifth generation. For over 100 years, WALO has been committed to the combination of consistency and innovation.


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What we do

WALO is active as an innovative total solutions company in all markets of the construction industry. With its decades of experience and the permanent development of sustainable as well as economical solutions, the family-owned company has established itself as a reliable partner in the construction industry and infrastructure projects in Switzerland and worldwide.


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Projects

We have successfully implemented many challenging projects and are proud to let our references speak for our work.


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Career

Good construction and thus satisfied customers require precise work. All our employees, from unskilled workers to engineers, play a key role in ensuring that we achieve this goal time and time again.


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With our locations in three countries, we are by your side worldwide.


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Terroba Dam, Spain

Discover how WALO overcame the challenge of sourcing clay for the Terroba Dam, and instead implemented a bituminous upstream lining system to reduce material costs and complete the project more efficiently.

Case Study Description

The Terroba Dam impounds the winter rainfall to enable constant irrigation of the fertile valley during the drier spring and summer months. The initial plan for the dam included an embankment dam with a clay core. However, clay is in short supply in the surrounding area so sourcing and transporting clay to the site would have proved prohibitively  expensive. An alternative technical solution was required and so to solve the problem, the design was changed to a bituminous upstream lining system. As the design had been so radically changed, the earthworks were completed much more quickly so far more  economically. Also, by substituting clay with a more sophisticated option of a bituminous lining, the material costs for the project were considerably reduced. WALO, with its  specialist Dense Asphaltic Concrete (DAC) capability, was selected to provide the lining system, given that DAC is ideal for projects like this, being highly robust yet flexible and quick to lay, even on very steep slopes.

 

The work also included a 425m joint construction to the plinth and abutments and 305m joint construction to the parapet wall at the crest. This meant that the WALO team had to bond together securely two very different materials – the flexible DAC and the rigid  concrete. This kind of highly specialized technical work can only be carried out  successfully by exceptionally skilled and experienced craftspeople. The bituminous upstream lining system to the dam constructed by WALO covered a total surface area of 23,100m2, with a steep 94 m long slope with an incline of 1:1.8. The lining system consisted of 150-200 mm of crushed aggregates, 2 kg/m2 of emulsion spray applied tack coat, an Asphaltic Binder Layer (ABL) of 70 mm and a DAC layer of 60 mm and 2 kg/m2 mastic coating.

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Contact

Walo Bertschinger AG
Giessenstrasse 5
8953 Dietikon 1

Location
Spain
Service
Building time
2012
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We appreciate your interest in the WALO Group and will be happy to answer your questions.

Walo Bertschinger AG

Headquarters
Giessenstrasse 5
Postfach, 8953 Dietikon 1

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