When renowned Mexican Engineer Juan del Avellano Macedo founded MEXPRESA in 1976, he he paved the way for a constant evolution of Construction Techniques, which helped the Company first be a star in the Mexican market, then project itself abroad to reach its current international reputation.
In 1977 MEXPRESA installed prestressed ground anchors for the cement silo for “Cementos Cruz Azul” in Oaxaca to fix the structure to the ground.
From that, the technique evolved in Mexico had its most valuable expresion in the “Pensil Viaduct Tunnel” project in 1985, a structure that won several international prices.
In 1978 with the “Bridge over the Tula River” in Hidalgo, MEXPRESA introduced in Mexico the Incremental launching system, method that today is one of the most used for bridges construction.
In 1980 MEXPRESA introduced the use of the rebar splicing sytem, and today it is one of the most used ways to make an union between rebars of 1” diameter or more.
In 1982 the “Metlac” bridge was build and MEXPRESA used for the first time for the construction of 120mts heigh piles the climbing formworks. The construction of the prestressed concrete superstructure was made with the balanced cantilever system. The segments were 5 meters long and with a 90 meters long span MEXPRESA achieved a world record of building bridges for two way railway lines.
For the construction MEXPRESA used their own jacking system, travelers and forms and the DEL multistrand post-tensioning.
With the construction of the “Dovalí Jaime” bridge over the Coatzacoalcos river, MEXPRESA introduced the expantion joints for large movements. This joints has been used since then like for example for the “Quetzalapa” bridge on the Mexico- Acapulco highway that was build in 1993 an needed an expantion joint for movements of 720mm.
In 1988 MEXPRESA developed the DEL Cable Stay System with a high dynamic capacity and for what the system has been preferred at least in 8 cable stayed bridges in Mexico.
In 1990, during the construction of the “Ejido” bridge on the Mexico-Acapulco Highway, MEXPRESA found the opportunity to use for the first time in Mexico the Erection Girder Gantry System to solve problems when a bridge has a difficult access.
The first Jacking System is used at the “Pozuelo”
Bridge on the Mexico-Acapulco Highway in 1991.
The System is now regularly on construction sites.
In 1992 MEXPRESA introduced in Mexico the use of the selfdrilling ground anchors to stabilize grounds that tend to collapse or fall in. This kind of ground anchors are an easy and fast solution for this kind of problems.
In 1994 MEXPRESA installed for the fist time in Mexico the precompressed neoprene seals for concrete pavements that are already used all around the world.
In 1999, with the construction of the “Grijalva “ bridge in Villahermosa, Tabasco, MEXPRESA improves the stay cable system for a more stylish design and for a easier way to construct it.
In 2005 MEXPRESA implemented in Mexico the Advancing Shoring System, a technique used in Europe at urban construction sites because of its efficiency at the “Tarango” bridge in Mexico City.
In 2006, MEXPRESA builded the first moveable bridge in Lázaro Cárdenas, at the “Albatros” bridge, including the hydraulic System for the elevation.
At the same bridge, the seismic movements are controlled by the Shock Transmission Units supplied by MEXPRESA.