No. 17 of 19 Geosynthetics in Dams by Daniele Cazzuffi ENEL Hydro, Milan, Italy. The information presented in this document has been reviewed by the Education.

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Presentation transcript:

No. 17 of 19 Geosynthetics in Dams by Daniele Cazzuffi ENEL Hydro, Milan, Italy. The information presented in this document has been reviewed by the Education Committee of the International Geosynthetics Society and is believed to fairly represent the current state of practice. However, the International Geosynthetics Society does not accept any liability arising in any way from use of the information presented.

Main Functions of Geosynthetics in Dams FunctionProducts (see notes for key to product types) Types of Dam Earth /RockConc /Masonry Rolled Conc BarrierGMB, GCM New/ Refurb RefurbNew DrainageGT, GN, GCD New/ Refurb RefurbNew Erosion Control GT, GN New/ Refurb RefurbNew FiltrationGT New/ Refurb ProtectionGT, GG, GCR New/ Refurb ReinforcementGT, GA,GL, BT, BA, BL New/ Refurb

Contrada Sabetta Rockfill Dam

1.Concrete slab (0.2m th) 2.Sheet Bit paper Felt + 2 sheets membrane 3.Porous Concrete 4.R/C Slabs 5.Dry Masonry 6.Joint 7. Plastic Conc wall 8. Conc plinth 9. Gallery

Contrada Sabetta Rockfill Dam

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Lago Nero Concrete Dam

Lago Nero Concrete Dam Upstream Facing

Lago Nero Concrete Dam Upstream Facing After the Rehabilitation Works.

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La Parade Homogeneous Earthfill Dam 1,2,3 4, 5 : Construction layers

La Parade Homogeneous Earthfill Dam

Codole Rockfill Dam : France

Valcros Earth Dam : France

Placing the Geotextile Filter in the Upstream Facing of Valcros Dam

Hans Strijdom Zoned Rockfill Dam

Maraval Dam – France (1976)

Maraval Dam

Davis Creek Dam : USA

Surface Erosion Control

Moochalabra Dam : Australia 1.Steel Mesh 2.Rockfill 3.Granular filter 4.Clay Core

Blue Ridge Parkway Dam : USA

Filled Geotextile Systems

Conclusions Geosynthetics successfully used in rehabilitation and new construction of dams Geosynthetics have allowed reductions in volumes of natural materials used in the dams Geosynthetics can give increased safety in service and reduction of hazards during construction

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