lyovers, subways with both road and railway overloads and artificial boxed tunnels.
The manufacturing system used to make the precast sections is the upshot of research by the Paver technical department and is patented.
Two types of precast products can be used for this type of job.
The precast section with 1.25 m width consists of a stiffening rib behind the vertical face which has a rectangular section at the top. The stiffening ribbing has a first constant cross section and a second with variable height according to a 17% inclination on the vertical.
The precast section with 2.5 m width with two stiffening ribs behind the vertical face.
The stiffening ribs have a first regular section and a second section of variable height with a 20% inclination off the vertical. The two ribs are connected together by a base.
The edges feature a male-female joint so as to trap the materials and allow assembling the sections, including by following a concave or convex curve. At the base of the wall, the ribs each have a cross-opening for the reinforcements of the connecting beam between the panels; the height of the opening is determined on the basis of the height of the stabilization base, ensuring an adequate covering of the upper beam reinforcement.
The precast section can be made, on the top, with protruding reinforcements and inserts requested by the customer, to produce an upper beam which has the double function of integrating the precast panels and creating the support/connection for the base.