An investigation found that a series of construction deficiencies in the overpass caused the accident, resulting in 26 deaths.
The investigation of the Mexico City subway disaster revealed that the collapsed overpass had a series of architectural defects. Killed 26 people And aroused angry demands for justice.
The Norwegian engineering company DNV issued a preliminary report on Wednesday that structural failure caused the elevated part to give way on May 3, causing a passenger train to crash.
The preliminary findings presented by the Mexico City authorities at a press conference identified some shortcomings in the construction process.
They include “unfinished and/or poorly executed welds”, insufficient bolts and the use of different types of concrete.
Experts also found deformations and fractures in the beams of the collapsed part, injuring dozens of people and triggering allegations of negligence from relatives in the disaster.
The city’s newest subway line has been problematic since it opened in 2012.
Mexican director Eckhard Hinrichsen said at a press conference that DNV, who was hired by the authorities to investigate the cause, plans to submit two more reports on July 14 and August 30.
The purpose of the detector is to determine whether the design and materials are appropriate, whether the construction conforms to the design, and whether operation and maintenance are the factors that caused the crash.
Prosecutors are also investigating the disaster, but have not yet released their findings.
Mexico City Mayor Claudia Sheinbaum stated that she will form a technical team to reinforce and repair the 24.5 km (15 mi) line.
The anger over the crash engulfed two political supporters of President Andrés Manuel López Obrador, as well as the main rivalry for the left-wing party candidate in the 2024 presidential election By.
Sheinbaum faces the question of whether the network has been properly maintained since taking office in 2018.
The Minister of Foreign Affairs Marcelo Ebrard (Marcelo Ebrard) was responsible for overseeing the development and commissioning of the line during his tenure as Mayor of Mexico City from 2006 to 2012.
Ebrard has stated that he terminated his management responsibility for the project when he left.
According to the senior diplomat, the problem of elevated tracks became widely known after a strong earthquake in the capital in 2017.
Ebrard issued a statement on Wednesday defending his role in the subway project, saying that his office had held an international tender to select a construction company.
He added that it has also set up an autonomous public entity to manage the project as well as a central committee and a technical subcommittee, and seek advice from the Mexican engineering agency.
Mexican billionaire Carlos Slim also faced scrutiny of the disaster because one of his companies was involved in the construction of the collapsed part.
Before the report was published on Wednesday, Lopez Obrador reiterated that those responsible for the tragedy will be punished and pledged to support the reconstruction of the route.
He rejected the employers association’s suggestion that the accident was related to the reduction of public expenditure.
The authorities were also attacked by one of the subway unions, which stated that its earlier warnings about overpass damage had been ignored.
Line 12, also known as the Golden Line, cost about US$1.2 billion, 70% higher than the original plan.
In 2014, due to the aging of tracks, railway fasteners and sleepers, the operation of 12 stations along the line was suspended for more than a year.