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  • Who we are
  • What we do
  • Projects
  • Career
  • Contact
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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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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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We have successfully implemented many challenging projects and are proud to let our references speak for our work.


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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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Lostallo Landfill, Switzerland

WALO was selected to provide a lining system at the Lostallo landfill site for Cell 5, a cell of approximately 10,000m2, which presented the main challenge of working on extremely steep slopes.

Case Study Description

The Lostallo landfill site, covering an area of around 30,000m2, is located in Lostallo, a village in the district of Moesa in the Swiss canton of Graubünden, in the Italian area of Switzerland. WALO was selected to provide a lining system at the landfill site for Cell 5, a cell of approximately 10,000m2.

 

The main challenge presented by this project was the extreme incline of the sides of the landfill cell. At 1:1.5, the slopes are extremely steep, which was where WALO’s particular expertise came into play as the company specializes in working on very steep slopes with specially designed machinery and highly skilled operators. In addition, environmental issues are of paramount importance in Switzerland so environmental protection of the site was absolutely crucial.

 

Groundwater is always vulnerable to contamination from leachate and methane, found in most solid waste landfill deposits. WALO’s Dense Asphaltic Concrete (DAC), formulated in the company’s laboratory to a design mix unique to the project, is a highly robust barrier lining system, impermeable to both of these contaminants and so was the ideal choice at Lostallo. The cell base and slopes were leveled by an excavator and a foundation layer was then placed by bulldozer, secured for working on the extreme slope by one of WALO’s 60 ton winches. Next to the clay liner (k>5×10-8 m/s), some 7-800 mm thick asphalt was placed in two layers by WALO’s asphalt paver and main winch. The two bituminous layers – the Asphaltic Binder Layer and the Dense Asphaltic Concrete layer – were also installed by the main winch and paver and compacted by rollers on winches.

walo-us-project-lostallo-landfill-01
Contact

Walo Bertschinger AG
Giessenstrasse 5
8953 Dietikon 1

Location
Switzerland
Service
Building time
May – August 2013
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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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