Description
The El Cajón Hydroelectric Project, located on the Santiago river, is the largest infrastructure project carried out in Mexico within the last 10 years. It forms part of the Santiago Hydrological System and it is designed for the generation of electrical energy through two 375 MW units. An average total annual generation of 1,228.64 GWh is planned. Among the six power stations built to date, this project holds the second place in terms of power generation.
This reservoir contributes towards regulating the run-off of its basin and benefits the Aguamilpa Power Station. The reason is that when this basin receives the river's controlled water contributions, it increases firm power generation and the chances of pouring over the spillway are reduced.
ULMA Solution
A number of smaller project within the main one were carried out, like the 42 km access roads, the two lines of two 400 kV circuits of a total approximate length of 18 km, altering the course of the Santiago river through two portal cross section tunnels, a bridge over the Santiago river, as well as various infrastructure, social development and environmental protection projects.
RAPID slab formwork, safe and highly durable, was used in the construction of the slabs for the underground machine room that houses two sets of turbo generators, with a total installed power of 750 MW at the generator's output.
The perfect combination of climbing roll-back systems and ENKOFORM V-100 Vertical Formwork resolved the construction of the walls, the spillway gallery and the generator area of the machine room.
For the execution of the piers in the controlled excess flow spillway, the curved walls, the tailrace conduit and the header beam, the optimal solution was applied using climbing systems without roll-back, ENKOFORM V-100 and beams.
Light but strong SP Props were used as slab formwork support. Their special design facilitated a fast adjustment during construction.
