Carpi Technology

Chiasso, Switzerland

Carpi Technology

Chiasso, Switzerland
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Cazzuffi D.,Centro Elettrotecnico Sperimentale Italiano | Giroud J.P.,JP GIROUD Inc. | Scuero A.,Carpi Technology | Vaschetti G.,Carpi Technology
9th International Conference on Geosynthetics - Geosynthetics: Advanced Solutions for a Challenging World, ICG 2010 | Year: 2010

In more than 270 dams worldwide, geomembranes are the main waterproofing component. The geomembrane is generally associated with other geosynthetics performing various functions, thereby forming a geosynthetic barrier. In this paper, uses of geosynthetic barriers in the various types of dams are reviewed. The types of dams reviewed include: embankment dams (earthfill and rockfill dams), concrete and masonry dams, and roller compacted concrete (RCC) dams. Design and construction aspects are considered, as well as selection of geosynthetic materials and performance (including seepage control and durability). The paper is illustrated using a number of examples of new dams and rehabilitation of existing dams, including examples of the early dams constructed or rehabilitated using geosynthetic barriers in the 1950s, 1960s and 1970s.

Scuero A.M.,CARPI Technology | Vaschetti G.L.,CARPI Technology | Subramanian V.,CARPI India Waterproofing Specialists P Ltd.
Water and Energy International | Year: 2010

Since 1959, synthetic waterproofing geomembranes have been effectively used to control seepage and uplift in all types of dams up to 198 m of height, all over the world, in all types of climates, and even underwater. Applications range from rehabilitation of upstream face and waterproofing of cracks, to providing imperviousness to new RCC dams and fill dams. The paper describes their application in different types of dams and compares their function and performance versus other waterproofing methods.

Scuero A.M.,Carpi Technology | Vaschetti G.L.,Carpi Technology
International Journal on Hydropower and Dams | Year: 2011

An overview of some recent applications of waterproofing geomembrane systems in Europe are presented here. Several of these projects will be discussed further at the Symposium on Dams and Reservoirs under Changing Challenges during the 79th ICOLD Executive Meeting in Lucerne.

Scuero A.M.,Carpi Technology | Vaschetti G.L.,Carpi Technology
Managing Dams: Challenges in a Time of Change - Proceedings of the 16th Conference of the British Dam Society | Year: 2010

The paper discusses repair of Concrete Faced Rockfill Dams (CFRDs) with geomembranes, with emphasis on a project where a geomembrane system is being installed underwater in 2010, at Turimiquire, a 113m high CFRD in Venezuela, designed by Barry Cooke. An exposed Polyvinylchloride (PVC) geomembrane is being installed to restore imperviousness to the deteriorated facing where leakage has reached 9,800 l/s. The 2010 project will cover the area requiring immediate repair, and it is expected that the remaining parts of the upstream face will be lined in subsequent projects.

Scuero A.M.,Carpi Technology | Vaschetti G.L.,Carpi Technology
Dams and Reservoirs under Changing Challenges - Proceedings of the International Symposium on Dams and Reservoirs under Changing Challenges - 79 Annual Meeting of ICOLD, Swiss Committee on Dams | Year: 2011

Europe has been a pioneer in impervious geomembrane systems for long-term waterproofing of dams. Most innovations, both for rehabilitation and for new construction, have been performed on European territory, or have been developed by European designers. This paper presents some significant recent or historical projects that are representative of the possible numerous applications of geomembrane systems to the rehabilitation of existing dams and to the construction of new dams. © 2011 Taylor & Francis Group.

Thanopoulos Y.,Public Power Corporation of Greece | Scuero A.,Carpi Technology | Vaschetti G.,Carpi Technology
Dam Maintenance and Rehabilitation II - Proceedings of the 2nd International Congress on Dam Maintenance and Rehabilitation | Year: 2011

Messochora is a 150 m high Concrete Face Rockfill Dam in Greece, owned by Public Power Corporation (PPC). The bottom 52 m of the face slabs are covered by backfill. The dam, completed in 1996, was never impounded due to environmental reasons. In view of upcoming impoundment, PPC envisaged to rehabilitate the external waterstops that had deteriorated over the years, and to take preventive measures to avoid compression and tension cracking recently observed in some CFRDs of similar characteristics. A tensioned exposed geomembrane system will fully cover the face slabs in the lower 58 m, and the peripheral joint along the plinth up to the crest. A new external waterstop will waterproof the top 40 m of the vertical joints between slabs. Tension and compression joints will be treated differently, based on recent findings and recommendations of international experts. The paper describes design, components and installation steps performed. © 2011 Taylor & Francis Group, London.

Scuero A.,Carpi Technology | Vaschetti G.,Carpi Technology
WasserWirtschaft | Year: 2013

Construction of pumped storage schemes is increasing in many European countries and around the world to implement/backup the energy production from windmills. To ensure efficient and safe operation, the storage reservoirs must be watertight and maintain watertightness over time. Traditional waterproofing solutions like concrete and bituminous concrete linings need periodical and/or accidental maintenance that may have significant impact on operation of the scheme. A viable alternative, based on well-proven systems adopted for new construction and rehabilitation of dams and reservoirs, is to use impervious flexible geomembranes, generally Polyvinylchloride (PVC) composite membranes embedding a backing geotextile for anti-puncture protection, which can be installed on fairly uneven base layers, reducing surface preparation. Several anchorage systems are available to maintain the liner taut to the surface under varying water level and against wind uplift. The advantages of a geomembrane system in pumped storage schemes are numerous: the geomembrane can be installed on very steep/vertical slopes unattainable with a bituminous concrete facing; being all components prefabricated and their assembly controlled at site by standardised methods, watertightness at completion of works can be checked, and monitored over service; installation times are much shorter and practically independent of weather conditions, cost advantage can be significant; one guarantee covers design, materials and installation; no maintenance needed, watertightness maintained for several decades; accidental damage can be repaired even underwater, no outage of scheme; with > 230 % 3-dimensional elongation a geomembrane liner can resist settlements/differential movements at concrete appurtenances that would cause failure of a bituminous concrete liner or a concrete facing. Design and installation aspects, and indications on future prospects, will be discussed through case histories in Italy, India, Germany and Iran.

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