Probe finds new defects of Mexico City metro collapse!

Mexico City | 19th June 2021 | Virtual Wire

The collapse of Line 12 of the Metro in Mexico City last month that killed 26 was caused by a series of faults during construction, according to the report of an independent inquiry from Norwegian group DNV.

The city government hired Norwegian certification firm DNV to study the possible causes of the May 3 accident, in which a span of the elevated line buckled to the ground, dragging down two subway cars.

The accident was caused by “structural faults associated with deficiencies in the construction process. The studs showed deficiencies in the welding process,” the report states.

Mexico City Mayor Claudia Sheinbaum stressed that the findings regarding the “terrible tragedy” were preliminary. DNV expects to publish two more sets of findings, on July 14 and August 30.

Interrupt service

In addition, the Civil Engineering Corps of Mexico said the metro Line 12 that suffered a deadly collapse last month found evidence of other deficiencies and vulnerabilities that require further analysis.

The corps inspected 11.1 kilometres (6.9 miles) of the now-suspended Line 12 metro route, excluding the exact location of the May 3 accident that killed 26 people.

The corps recommended giving priority attention to repairing the fissures in columns and other parts of the metro line's infrastructure and reviewing the separation between the columns for the metro and a bridge for cars along the heavily transited inner city ring road known as the Periferico.

The Civil Engineering Corps advised not to continue the service in any of the sections of Line 12 of the Metro Collective Transport System until a detailed review of the work is carried out and the pathways after deficiencies and vulnerabilities were identified.

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