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• Mexico city metro overpass collapse free#

Mexico city metro overpass collapse free#

Nonetheless, Slim agreed with the government of Mexico to repair the section free of charge. Although Carso was the company responsible for the construction of that section, the group denied any wrongdoing. They further found that the lack of functional studs coupled with poor welds led to fatigue in the beam that collapsed.

Their preliminary investigations suggested that it was related to deficiencies in the construction of the bridge. An earthquake in 2017 further damaged the span and, although it was repaired within a few months, residents reported that problems still existed years later.ĭet Norske Veritas (DNV), a Norwegian risk management firm, was hired to conduct an investigation to find out the causes of the collapse. Empresas ICA in association with Alstom Mexicana and Grupo Carso, the latter owned by businessman Carlos Slim, were contracted for the construction. Due to budget and time constraints, however, the project was modified to operate both underground and overground with steel-wheeled trains.

The line was announced in 2007 as an underground line with the possibility of operating with rubber-tired trains and was scheduled to be opened by 2010.

The line presented technical and structural problems that led to a partial closure of the elevated sections–where the accident occurred–between 20. Lack of functional studs and poor welds that led to fatigue in the collapse point