The controlled explosion was deemed necessary to bring down the remainder of the deck and the support tower of Chirajara bridge, which were all that remained after the fatal collapse.
[1] It crosses a ravine at a height of 280 metres (920 ft) and is held by stay-cables from two towers, of which one collapsed.[2]. It is considered that it did not play a part in the collapse and could be reused to support a similar type of bridge. An unfinished bridge that collapsed while under construction in the mountains of central Colombia has been demolished with 200kg of explosives. +44 1935 374011 Both the ACI and the preliminary report have recommended that the existing tower, which is of the same design and construction, be demolished. The agency in charge of the project during the collapse was Corianders with GISAICO and ICMO as the sub- contractors.

[4], The investigation into the failure of the western pier was conducted by the American company Modjeski and Masters. The report found that the foundations structural and geotechnical capacities were adequate for this type of bridge and could be retained for the reconstruction.[5].

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Some 120 workers are at the site on any given day. While under construction, one-half of the bridge collapsed on January 15, 2018. The collapse of the bridge was caused by a failure in the tension elements in the transverse beam (losa cabezal - see image below) and lower diaphragm (tabique – see image) of the diamond-shaped tower. The bridge, which was planned to have a 286m-long main span, crossed a 270m-deep ravine and was 80m away from deck closure at the time of the tragedy. RE: Investigation of the Collapse of the Chirajara Bridge, Columbia BridgeSmith (Structural) 10 Jun 19 00:20 Wright was a great artist, I'll give him that, but as with so many, greatness in one area blinded him to his limitations in others, and led to ugly failure. Coordinates: 4°12′19.929″N 73°47′46.948″W / 4.20553583°N 73.79637444°W / 4.20553583; -73.79637444, "Bridge collapse in Colombia kills 10 construction workers, several missing", "Nueve muertos por desplome de placa de puente Chirajara en vía Bogotá - Villavicencio", "Bridge Collapse in Colombia Reportedly Kills Nine Construction Workers", "Report published on fatal Colombian bridge collapse", https://en.wikipedia.org/w/index.php?title=Chirajara_bridge_collapse&oldid=937394677, Articles to be expanded from January 2018, History articles needing translation from Spanish Wikipedia, Creative Commons Attribution-ShareAlike License. +44 207 973 4697 The remaining second pier pylon was demolished in July 2018.

Coviandes published the results of the investigation by Modjeski & Masters in April 2018. Preliminary report points towards lack of reinforcement in Chirajara Bridge tower cross-beam. The pylon collapsed in January, killing 10 workers. This page was last edited on 24 January 2020, at 19:12. h.russell@hgluk.com, Investigators find design flaws in collapsed Florida bridge, Portugal invites tenders for third Tagus crossing, Pylons take shape for Chinese mega-bridge, Primary repairs completed following Nipigon Bridge bolt failures, Details outlined for Champlain Bridge removal, Plan unveiled for two New Zealand bridges, Footbridge proposal included in Isle of Man plan, First US state secures permit for full bridge inspections by drone, Verifier appointed for Norway's E39 bridges. The Chirajara Bridge was a cable stayed bridge spanning the Chirajara gorge in Columbia. First investigations into last month's collapse of one of the towers of the 446m-long Chirajara cable-stayed bridge, which killed nine workers and injured several more, have focused on the lack of reinforcement in the cross-beam. In January, members of the American Concrete Institute carried out a drone inspection at the request of Colombia’s national infrastructure agency. Coviandes will proceed with its demolition, once it receives authorisation from its insurers. The experts also highlighted the configuration of the steel stressing tendons, which connected the slab to the columns, where there was a greater number in a longitudinal direction than in the transversal. Concessionary company Coviandes was awarded the concession by Invias for the operation and maintenance of the Bogota-Villavicencio road and in 2010 for the construction of the new Bogota-Villavicencio highway. Newspaper reports indicate that only 20 of the expected 200 workers were on the section that fell, due to the fact that most of the workers were attending a training session on the opposite side. Coviandes has already invited international groups to bid on the design and construction of the replacement structure.

The bridge was to be one of the engineering feats of Colombia’s Fourth Generation, dubbed 4G, highway modernization projects. Coviandes was the agency in charge of the project. If possible, verify the text with references provided in the foreign-language article. h.russell@hgluk.com. The investigative report has now been published into the fatal collapse of a major bridge in Colombia. According to a eyewitness reports, at least 21 construction workers were on the bridge at the time one of two 258 meter high towers collapsed. +44 207 973 6400, Editor - Jose Sanchez Modjeski & Masters also found a significant crack in Tower C, which still stands. +44 1935 374011 In the meantime, concessionaire Coviandes commissioned Modjeski & Masters to carry out a study and analysis of possible causes of the collapse. The study by Modjeski & Masters ruled out suggestions that the accident was due to poor quality of materials and instead concluded that the design was to blame. [3] Subcontractors were two different companies, GISAICO S.A. and ICMO S.A.S. The Chirajara Bridge is part of a programme to improve the route leading from Bogotá to the eastern plains by turning parts of it into a dual carriageway. +44 207 973 6400, Editor - Jose Sanchez According to reports, the western side of the structure collapsed and a support pylon gave way as welders performed draining work on the bridge.

The report also found cracking on Tower C, which remained standing, which was consistent with the early stages of the collapse mechanism and recommended its demolition.

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