Chief supervision engineer Wang Junxia, female, 38 years old, is the chief supervision engineer of jl-5 contract section of Mianxian section of national highway 108 (from Liuyi village of Xinjiezi to shuimowan of Wuhou town) of Henan road company
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3 beam in place, and the No
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Some metal structures are old and broken, and the overall safety performance of the bridge erecting machine is poor It does not have the basic safety technical conditions
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At the front end of the truss of the right main girder of the bridge erecting machine which rolled to the right after disintegration, nine people, Wang Junxia, Tan Huajun, Cui Gaoxian, Yao Di, Fu Yongping, Dong Binghong, Ji Hui, Wang Haitao and Xiao Wen, were smashed on the bridge deck, and three people, Qi Chenpeng, Hu Chang’an and Li hangbo, were scratched in varying degrees during the Dodge
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Today, I would like to review the accident with you
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Cui Gaoxian, male, 55 years old, legal representative of Yinhe company, contracted construction services in violation of regulations; decided to use zhangkun construction team and its bridge erecting machine introduced by Zhongbei company; as the main person in charge of the construction unit, ignored his own safety, rashly entered the dangerous operation area, resulting in his own death, and took the main leadership responsibility for the accident
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Source: Hanzhong Emergency Management Bureau, Tencent video, China work safety network, work safety, everyone is responsible! This is a sentence that we engineers should always keep in mind
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(2) The construction scheme of Hanjiang No.2 bridge girder prepared by the project Department of SG-3 bid section of Zhongbei company failed to put forward clear requirements for the safety technical conditions, installation unit, installation personnel and operator qualifications of the bridge erecting machine used for the erection of Hanjiang No.2 bridge; failed to strictly review the compliance of Zhang Kun’s construction team and its bridge erecting machine, and illegally subcontract the girder erecting project to Zhang Kun; used the false information provided by Zhang Kun He organized Yang Yujian and other unqualified personnel recruited by Zhang Kun to illegally install the bridge erecting machine in the name of “civil rights Zhongquan road and Bridge Equipment Co., Ltd”; he used the false blank installation documents of “civil rights Zhongquan road and Bridge Equipment Co., Ltd” provided by Zhang Kun to fabricate installation materials, apply for supervision and inspection, and defraud Conclusion: the bridge erecting machine was put into use without registration; Yang Yujian and others were tacitly allowed to work without certificate and operate special equipment for girder erecting.
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After 14:00 on July 18, 2019, the operator of Zhang Kun bridge erecting team started to erect 2-span left No.1 beam (weighing 95t) under Yao Di’s command
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At 14:25, when the No.1 girder suspended by the bridge erecting machine moved to the No.1 position on the left side of the second span and was ready to fall into position, accompanied by a “click” sound, the support pin of the steel cylinder of the left front outrigger of the bridge erecting machine suddenly fell off, the left support steel cylinder retracted and sank, the No.1 box girder rotated anticlockwise centered on the geometric center of gravity of the box girder, and the bridge erecting machine flicked its tail to the right side, driving the truss of the right main girder of the bridge erecting machine and the right front outrigger to rush forward for about 5m The capping beam of No.2 pier fell in the air, the left supporting steel tube broke and fell to the right rear, and the bridge erecting machine overturned and disintegrated instantly
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（2） Indirect reasons: 1
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I hope there will be more warnings! On July 18, 2019, in shuimowan, Dingjunshan Town, Mianxian County, Shaanxi Province, the bridge erecting machine of Hanjiang No.2 bridge collapsed suddenly during the operation of SG-3 bid section of Mianxian section of national highway 108, causing 5 deaths, 4 serious injuries and 3 minor injuries
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Accident cause analysis (1) direct cause 1
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Li hangbo went to the hospital for examination and hospitalization
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Due to the rotation of the main beam, the rear part of the suspended No
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It has been used for 8 years at the time of the accident, and the safety assessment has not been carried out according to the safety regulations for bridge erecting machine (gb-26469-2011)
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He should have been transferred to the judicial organs for criminal responsibility, but he was exempted from investigation because he died in the accident
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At 14:20, the No
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In view of his death in the accident, he was exempted from investigation
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3 beam out of the pier cap beam and fell onto the track of the second line of Yang’an railway under the bridge
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1 beam pulled the No
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As the main person in charge of the construction site, he ignored his own safety and rashly entered the dangerous operation area, resulting in serious accidents He is mainly responsible for his own death
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The website of Hanzhong Emergency Management Bureau released the reply and investigation report of the accident
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in May 2011, and obtained the bridge erecting machine certificate (February 2018) and special equipment Manufacturing Certificate (February 2018) of “Minquan Zhongquan Road and Bridge Equipment Co., Ltd.” through the internal staff of Minquan Zhongquan road and Bridge Equipment Co., Ltd License, special equipment installation, transformation and repair license, wjq120-30a3 bridge erecting machine product installation and operation manual and drawings, stamped with forged seal of “civil rights Zhongquan road and Bridge Equipment Co., Ltd.” to replace the old with the new, to replace the fake with the real, contracted bridge erection activities, and illegally engaged in the installation of special equipment
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The accident bridge erecting machine was purchased in May 2011
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At about 14:50, 119 fire rescue team and 120 emergency personnel arrived at the scene of the accident, rescued Yao Di, Fu Yongping, Dong Binghong, Ji Hui, Wang Haitao, Xiao Wen, Qi Chenpeng and Hu Chang’an and sent them to Mianxian people’s Hospital for treatment
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Yao Di, project manager of Yinhe company, Lu Chang’an, supervisor of Xi’an Litian company, Wang Junxia, chief supervision engineer of Yulu company, Tan Huajun, Fu Yongping, Ji Hui, Qi Chenpeng, staff of project management office, and shaorui, Xiao Wen, Hu Chang’an, Wang Haitao, Li hangbo, branch of SG-3 bid project Department of Zhongbei company all gathered near the two span right span bridge erecting machine
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Yao Di and Fu Yongping died on the way to hospital
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Five people, including the legal representative of the construction unit, the project manager and the chief supervision engineer, died in the accident
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3 beam on the left side of the second span
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The metal structural parts are seriously corroded and worn, and there are many changes, welding reinforcement and maintenance traces
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Information fraud, illegal installation and use of special equipment: (1) Zhang Kun purchased the qjly30-120 bridge erecting machine of Henan Luyuan Construction Equipment Co., Ltd
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1 beam moved longitudinally above the No
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The installation in many places does not meet the specification requirements
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Personnel division: Yang Yujian operates the control handle, Dong Binghong (front end) and Shi huaijiang (rear end) observe and watch, Wang Jianyong and Yang Zhanwu are responsible for transporting beams from the beam yard to the site
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He should have been transferred to the judicial organs for criminal responsibility, but he was exempted from investigation because he died in the accident
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The following is the content of the investigation report (partial excerpts): the investigation report on the collapse of the “7.18” bridge erecting machine of Hanjiang No.2 bridge in SG-3 bid section of national highway 108 Mianxian first class highway reconstruction and expansion project
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At 14:10, accompanied by Chen Jiaqin, director of Transportation Bureau of Mianxian county and Cui Gaoxian, legal representative of Galaxy company, the leaders of Mianxian county Party committee arrived at the right side of 2-span bridge erecting machine (right deck) to inspect the construction progress of key projects
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The Emergency Management Bureau of Hanzhong City, Shaanxi Province, released the accident investigation report, responsible for 11 units, a total of 34 people! Yao Di, male, 30 years old, project manager of project management and Service Department of Hanjiang No.2 bridge over Yang’an railway in national highway 108 Hanzhong Mianxian expansion project of Yinhe company, is the actual organization and commander of concrete box girder erection construction of Hanjiang No.2 bridge 2, 3 and 4 spans
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The support pin of the left front leg steel cylinder of the accident bridge erecting machine was improperly installed and gradually dropped off during the operation of the bridge erecting machine, which led to the sudden instability and collapse of the bridge erecting machine under load
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2
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1 beam was scratched and twisted with the No
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