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Water and Energy International
Year : 2021, Volume : 64r, Issue : 8
First page : ( 27) Last page : ( 36)
Print ISSN : 0974-4207. Online ISSN : 0974-4711.

Upstream Waterproof Treatment with Protective Geomembrane for Masonry Dams - A Case Study on Upper Bhavani Dam, Tamil Nadu

Jagadeesan S.1

1Business Unit Manager, Carpi India Waterproofing Specialist Private Limited

Online Published on 09 December, 2021.

Abstract

The speed of aging in a dam depends on the construction and maintenance of the dam. Upper Bhavani Dam (2021) is a typical example of dam where the service life has been extended by another 4 decades at least. At one point of time in 2005, the dam was declared a distressed dam by the dam owner (TANGEDCO) and the Geomembrane system has come to their rescue and helped them extend the service life of the dams. In new dams (Kohrang, Sar Chesmeh) besides achieving large savings in earth and civil works, flexible geomembranes maintain water tightness in presence of settlement and seismic events and are not subject to cracking, which makes them durable and maintenance-free. Adopting a geomembrane system prolongs the service life of existing structures at a relatively low cost and allows the building of new hydraulic structures that will require no maintenance and can be monitored easily for its performance.

A Geomembrane waterproofing system is an effective method for seepage control and plays a very important role in the safety of the dam and increasing the lifespan of the dam. Geomembrane waterproofing systems are an established technique for long-term waterproofing. In India, Cases of Kadamparai Dam, (2005) Servalar Dam (2018), and Upper Bhavani Dam (2021) are typical examples of dams where the service life has been extended.

Geomembrane waterproofing system apart from improving the life of the dam also provides the engineers with ease of repair as the system is installed in an exposed condition.

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