After the incident, Nanjing Metro Group attached great importance to it and immediately carried out a joint investigation with the quality and safety supervision station of Nanjing Construction Commission rail transit construction project (hereinafter referred to as “Nanjing Construction Commission rail station”)
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The report was issued by Nanjing University of Technology Construction Engineering Technology Co., Ltd
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So, why does the steel bar break when it is knocked in the video? In this regard, Liu Jinwei, senior engineer of Jiangsu Construction Engineering Quality Inspection Center Co., Ltd., explained that after repeated bending, the toughness and plastic properties of steel bars are reduced, the brittleness is increased, and brittle fracture is easy to occur
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After the incident, Nanjing Construction Commission railway station immediately commissioned a professional testing agency to recheck the batch of steel bars, and the test results were qualified and in line with the national standard
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In normal construction, steel bars will not be bent repeatedly in this way, and they are all formed in one process
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On January 9, a video of workers breaking steel bars at the construction site spread on the Internet, pushing the construction quality of Nanjing Metro to the forefront
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After investigation, the video was produced and released by Han, a welder at the construction site
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The subway of a century, quality first
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Did not expect this will cause serious negative effects, after that, Han said he regretted it and apologized publicly through his personal video account
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In order to achieve the effect of content explosion and eye-catching, he deliberately did not shoot the content of repeatedly bending the steel bars, but only shot the content of finally breaking the steel bars, and joined the dubbing of questioning the quality of the steel bars, which spread to the network
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Site monitoring video shows that Han has repeatedly bent steel behavior
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This video is a fake video produced and released by workers at the construction site to gain network traffic
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Source: Modern Express + / zaker Nanjing reporter Liu Weijuan Cai Mengying editor: Xi Xi.
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After the video was released, it attracted many netizens to watch and forward
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After testing by professional institutions, the batches of steel bars involved are qualified and meet the national standard
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After the construction materials enter the site, the supervision unit and the construction unit carry out the preliminary acceptance
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Some netizens marveled at the amazing strength of little brother, while others questioned the quality of reinforcement
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How can a hard steel bar be broken at once? In this regard, the modern express reporter conducted a field investigation
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After the supervision engineer witnesses the sampling and sends it to the professional organization for testing, they can be used
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The reporter of Modern Express learned that the video was taken at the construction site of Shuiximen Street Station of Metro Line 9
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Nanjing Metro Group said it will further strengthen the management of the construction site and ensure the quality of the subway project
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According to the introduction of the construction party, they have a strict control process for the construction materials entering the site
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In the video, a worker slams a steel bar bent about 90 degrees on a steel plate and then breaks it in two
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The report shows that the tensile property, bending property and weight deviation of the sample meet the national standard
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Han said that after listening to the lecture, the steel bars are easy to break after repeatedly bending
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on December 31, 2020
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The construction unit said that it would seriously deal with Han
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At the same time, Nanjing Metro Group immediately verified the test reports of the batches of steel bars involved in the video
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