Conjet robot speeds dam repair in Venezuela

By Lindsay Gale20 October 2011

The Conjet Robot 364 at work removing conrete from one the Guri Dam's spillways

The Conjet Robot 364 at work removing conrete from one the Guri Dam's spillways

A Conjet Robot 364 hydrodemolition machine was used by Venezuelan contractor Fapco C.A, based in Puerto Ordaz, to remove concrete from the spillways of the Guri Hydroelectric Power Station on the River Caroni. The concrete, gravity and earth dam across the Necuima Canyon stands 162 m (532 ft) tall and has a crest length of 7,426 m (8,121 yd). Steel gates on the top of the concrete section control overflow down three adjacent spillway channels. The spillways have been in use for 30 years and the force of fast flowing water and continuous exposure to the elements had eroded the surface of the concrete. The Conjet unit has been mounted to a custom-built platform and removed concrete to depths ranging from 20 to 150 mm (0.8 to 6 inches).

Concrete was removed from an area covering 7,500 square metres (80,730 square feet) at a rate of up to 69 square metres (743 square feet) per day and was intermittent due to a combination of moving the platform, adjusting the Robot to the spillway geometry and refilling the water tank supplying the Robot. After concrete removal, Fapco followed on with a spray applied 800 kN/square metre strength mortar in areas less than 100 mm deep and 500 kN/square metre strength concrete in the deeper areas.

Fapco started on repairs to the first spillway in late 2009 and completed its contract in May 2011. Work on the project had to stop several times for several months, during the rainy seasons, when the spillway channels, not being repaired, had to be opened to control the level of the reservoir.

Delivered directly to your inbox, Demolition & Recycling International Newsletter features the pick of the breaking news stories, product launches, show reports and more from KHL's world-class editorial team.
Latest News
Air Spectrum launches zero emissions dust suppression system
Described as energy efficient and non-toxic, ecotech Rotary Atomiser offered for sale or rental
The latest advances in green construction equipment
Heightened focus on hybrid and electric equipment spurs manufacturers to invest in and partner on new technologies
Husqvarna invests €1m in Anglo-German tech firm
Swedish manufacturer takes equity stake in the software company which maximises augmented reality technology to boost efficiency 
Steve Ducker Editor, Demolition & Recycling International Tel: +44(0) 1892 786 210 E-mail:
Bridget Leary Sales Manager Tel: +44 (0) 1892 786 220 E-mail: