Incremental Launching Bridges
This is a deck construction process that involves the manufacture of deck sections (segments) in a fixed location (Manufacturing Park). Each section is then assembled with hydraulic jacks passing through the top of the piers with special support elements.
This process is repeated as many times as the number of deck segments or sections, fixing them together with the post-tensioning operations.
The assembly equipment includes horizontal and vertical hydraulic jacks so that the movement takes place in four phases, whereby the vertical jack lifts the platform load and it is then pushed by the horizontal jack to move the platform forward. After moving approximately 20 cm, the vertical jack is lowered, the horizontal jack is retracted and the cycle is repeated. Tecpresa equipment has a pushing capacity of 680 tons and an elevation capacity of 1,570 tons. This equipment is able to move a deck more than 1 horizontal km long with a capacity of up to 7 m/h.
San Julián Viaduct