Construction and Maintenance of hydraulic Structures with Geosynthetics
CARPI, established in 1963, has gained a worldwide experience and reputation in the field of waterproofing of all types of hydraulic structures by using synthetic geomembranes.
CARPI has installed PVC Geomembrane waterproofing systems on more than 230 hydraulic structures, (>4,000,000 sq. meters) including 150+ dams (> 1,200,000 sq. meters), and 50 canals and other hydraulic tunnels (>1,000,000 sq. meters) around the world. CARPI can provide the design, supply, and installation of a waterproofing system with PVC geomembranes on large dams of all types of hydraulic structures.
A specialist waterproofing contractor since 1963, and has pioneered new installation techniques that are now patented systems used worldwide for rehabilitation and new construction, and is continuously introducing new technologies and solutions of higher performance to the global market.
Carpi headquartered in Switzerland has offices in 19 countries to cater to the waterproofing needs across all corners of the globe. CARPI provides owners and consulting engineers with investigations and recommendations to correct leakage or infiltration problems for almost any type of hydraulic structure. CARPI provides reliable and cost-effective solutions, including final design and installation on any project worldwide.
CARPI's range of applications includes:
• Dams, all types (gravity, buttress, arch, multiple arches, roller compacted concrete (RCC), embankment, cofferdams)
• Pumped storage, reservoirs, water storage basins, floating covers
• Free flow canal and hydraulic tunnels
• Pressure tunnels and shafts
• Water supply and sewage systems
• Civil works (Foundation and roofing)
• Highway, railway, and metro tunnels
• Underground structures (Surge chambers, access shafts to power plants, potable water storage structures)
• Floating covers to avoid air pollutant or liquid evaporation
• Synthetic diaphragms against pollutants.
Our Ongoing Projects (India)
SERVALAR MASONRY DAM
Our technicians are racing against the clock to complete the waterproofing of the Servalar dam. This 52.74 m high masonry dam, located in Papanasam, Tirunelveli District (India) is the first to be rehabilitated in the DRIP program (Dam Rehabilitation and Improvement Project). The Dam constructed in the year 1986 has deteriorated so badly that it needed an emergency long term repair solution. The remaining 5% of the work is expected to be completed soon immediately after the monsoon ends. The benefit the public will attain at the end of this work will live a lasting impression on the next 2 generations. This remarkable reduction in the quantum of leakage will result in an additional supply of drinking water for the public as well as irrigation purpose apart from power generation
Outside India
ROGUN COFFERDAM - TAJIKISTAN
Rogun dam, designed to reach 335 m of height, will become the highest rockfill dam in the world. The scheme includes a nearly 68 m high upstream cofferdam up to 1,050 m a.s.l, waterproofed with a Carpi geomembrane system, a nearly 136 m high early production stage dam (also named Stage 1 dam) up to elevation 1,110 m a.s.l, waterproofed with an asphalt core, and a nearly 335 m high main dam up to 1,300 m a.s.l, waterproofed with a clay core. To possibly achieve the goal of testing and commissioning the first power unit of Rogun HPP within 2018, Carpi was invited by the Contractor, Salini-Impregilo, to study the feasibility of a temporary stage 1 dam up to 1,065 m a.s.l. This consists of a nearly 15 m heightening of the existing cofferdam with a geomembrane system covered with riprap, like the cofferdam.
STUDENT CONCRETE DAM - UNDERWATER - BULGARIA
The student is a concrete dam of the Nötzli type, located 30 km from Sofia, in Bulgaria. The dam, constructed in the years 1950-1953, is composed of 25 blocks with 55 m of height. After about 50 years in operation, concrete in the dam and in its appurtenant structures appeared very deteriorated and in 2004 the Bulgarian Government took the decision to implement a complete rehabilitation project to extend the functional life of the dam by another 50 years. The rehabilitation project is part of the Municipal Infrastructure Development Project for Bulgaria, financed by the World Bank. Installation is partly in the dry and partly underwater
Recently Completed Projects.
AREMA - ETHIOPIA
Zarema May Day dam is a nearly 152 m high, 900 m long, bituminous core rockfill dam in the northern Tigray region of Ethiopia, 200 km from Axum. The dam body is in rockfill with a bituminous core up to elevation 939 m a.s.l, and the top 15 meters lined with a Carpi geomembrane system, covered with concrete slabs. The dam, owned by the Federal Democratic Republic of Ethiopia Sugar Corporation, is part of an irrigation project for sugar production.
SAR CHESHMEH - IRAN
Sar Cheshmeh is a tailings dam owned by National Copper Industries Co. In 2007-2008 Carpi has installed an exposed geomembrane system on a total surface of 40,000 m2. Stage II B (raising the crest from 2,175.5 m a.s.l to 2,185 m a.s.l) started on 28th June and was completed on 14th August 2008 and Stage II C (raising the crest from 2,185 m a.s.l to 2,194 m a.s.l) started on 12th October 2008 and was completed on 26th November 2008. A small section of 420 sqm was completed recently.
GILBOA SHAFT - ISRAEL
This shaft is part of Gilboa, the first Israeli Pumped Storage Power Plant. This project includes an upper reservoir (Full Supply Level at 427 m a.s.l), a lower reservoir (Full Supply Level at 83 m a.s.l), an underground powerhouse, and a high pressure (HP) and a low pressure (LP) waterways. The HP waterway comprises a nearly 500 m high vertical shaft with a 4.5 m diameter. In 2017 Carpi had already performed repair works in the concrete intake structures of the two reservoirs, lined with a white HDPE. Then, PSP Investments Ltd, owner of the plant, has requested Carpi to provide a detailed design for the waterproofing of the HP shaft with an exposed geomembrane sealing system, with the goal of significantly reducing the potential leakage through the concrete lining and mitigating the loss of valuable water in the HP waterway.
Mrs. Gabriella Vaschetti,
Technical Director,
Carpi Tech B.V, Switzerland,
Email: gabriella.vaschetti@carpitech.com
Mr.Jagadeesan Subramanian ,
Manager (Technical/Marketing)
Carpi India, Chennai
Email: jagadeesan.subramanian@carpitech.com
Current Issue
12-2025
