DYWIDAG Strand Anchors permit the Stabilization of a Coastal Road on Madeira

In 2010, severe storms caused landslides on a connecting road on the southwest coast of the island of Madeira. The road therefore had to be comprehensively stabilized over a 90m long section between the towns of Moledos and Calheta.

The technical solution to this problem was a comprehensive slope stabilization using a curtain of 1m diameter concrete piles. The retaining wall was anchored using 1-3 levels of DYWIDAG Anchors. At the eastern end of the pile wall, an additional reinforced concrete retaining wall with a maximum height of 12m was built.

The Contractor asked DSI to produce and supply 75 permanent DYWIDAG Strand Anchors. The permanent anchors have 5 strands each and were supplied complete with anchor heads, 4 load cells and one hand-held measuring device in order to permit the monitoring of the forces acting on the anchors.

The anchors were produced in DSC’s factory in Madrid and shipped to Madeira. DSI fulfilled all technical requirements in close cooperation with the Owner. The ground underneath the road was regraded, which significantly decreased the deposits on top of the unstable ground. The roadway improvements were successfully completed in January 2016.


Governo Regional da Região Autónoma da Madeira, Portugal

General Contractor

Joint Venture, consisting of AFA - AFAVIAS Engenharia e Construções, S.A., and ANDRADE GUTIERREZ – Europa, África, Ásia, S.A., both Portugal


CENORGEO – Engenharia Geotécnica Lda., Portugal

DSI Unit

DYWIDAG Sistemas Constructivos S.A., Portugal

DSC Scope

Production, supply, technical support

DYWIDAG Products

75 permanent DYWIDAG Strand Anchors with 5 strands each, 4 load cells, 1 hand-held measuring device

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