The La Muratte dam. Waterproofing by PVC geomembrane. Technical feedback

Abstract

The waterproofing of the upstream face of the La Muratte gravity Dam, 100 years old, has been improved by adding a lining: PVC geomembrane + geotextile + synthetic mesh. The works took place during the summer 2004. One of the major issues at the site was the treatment of the ends of the lining (treatment of the edges on side and at the toe of the lining). The preparation in advance of the works is important. Both the contractor and the engineer in charge are involved in this key task during the detailed design stage, during the release of the method statement and the choice and adaptation of tools.