At 8:43 on September 13, 2023, the tower crane of the Jin Jianren Expressway Project, which was constructed by CCCC Second Harbor Engineering Bureau, collapsed during installation operations, resulting in 6 deaths, 4 injuries, and direct economic losses of more than 11.34 million yuan. Recently, the investigation team of the "9.13" large collapse accident of the Chengdu Jinjianren Expressway Project was informed that the "9.13" accident was determined to be a case after investigationDue to the illegal operation of tower crane installers, poor management of the construction site, inadequate daily management, and the failure to implement the responsibilities of the relevant departments and local party committees, the larger production safety liability accidents are caused. part 1
The cause of the accident
Jacking operator in the tower crane left jacking pin shaft is not inserted to the normal working position, make the front end taper position of this pin shaft squeezed, in the abnormal stress working state, adopt jack to adjust the hole deviation of the left fixed yoke rod and the jacking ladder, cause the axial displacement of the jacking pin shaft of the left abnormal load-bearing, fall out, all the load on the upper part of the tower body is borne by the right jacking pin shaft and the right reversing step pin shaft, cause the tower crane superstructure to lose the left side support, under the action of gravity downward pier sitting, collapse.
part 2
Suggestions for dealing with relevant responsible personnel and responsible units
(1) Persons who are exempt from accountability for death due to accidents
Chen Moudong, installation and dismantling worker of Chongqing Qianqiao Company. Violation of operating procedures, adopt jack to calibrate the hole position deviation of fixed yoke rod and jacking ladder under the condition that the step change pin shaft can not be inserted normally, cause the position displacement of the jacking pin shaft of abnormal bearing at the movable yoke rod in the hole, cause the accident to occur, and bear direct responsibility for the accident. In view of his death in the accident, it is recommended that he be exempted from liability. (2) Persons who have been arrested (2).1 Tu Fangchang, male, mass,Deputy manager of Jin Jianren Expressway Project of CCCC Second Harbor Bureau No. 2 Company, responsible for the construction and production, safety, environmental protection and civilized construction management of the main bridge section, and in charge of the equipment department。Failure to implement the responsibility system for safe production;The coordination and management of the tower crane installation operation site is not effective, and the warning area is not set up according to the provisions when the tower crane installation operation and support operation are organized simultaneously, and the full-time safety production management personnel are not organized to conduct on-site supervision and inspection, and the tower crane installation unit is not prevented from implementing the jacking operation without passing the supervision and inspection, and its behavior violates the "People's Republic of China Work Safety Law" Article 25, paragraph 1 (5), (6) [36], Article 26 [37], and "Construction". Article 17 of the "Regulations on the Administration of Work Safety in Engineering Safety" stipulates that he bears management responsibility for the occurrence of the accident and is suspected of the crime of major liability accidents, and was arrested on 29 September with the approval of the Jianyang City Procuratorate. 2 Li Yucheng, male, massesDeputy Manager of Chongqing Qianqiao Company, the person in charge of the tower crane installation construction project. Failure to perform duties on the job;The review of the special construction plan for the installation and demolition of the tower crane is not strict;The implementation of safety construction technology disclosure work is not in place, the operator is not familiar with the jacking principle of the tower crane, major operational risks and countermeasures, its behavior violates the "People's Republic of China Work Safety Law" Article 25 (5), (6), "Construction Project Safety Production Management Regulations" Article 27 of the provisions, the accident has management responsibility, suspected of major liability accidents, September 29 by the Jianyang City Procuratorate approved the arrest. (3) Personnel recommended to be transferred to the judicial organs for handling (2 persons).1 Official, male, mass,General manager and actual controller of Chongqing Qianqiao Company。The main responsibility for production safety is not implemented, and the responsibility system for production safety is not established and improvedNot according to the tower crane installation and dismantling special construction plan equipped with installation operators, operators are not familiar with the type of tower crane jacking principle, major operational risks and countermeasures;During the installation of the tower crane, the on-site technical person in charge was transferred, and no professional and technical personnel were arranged to conduct on-site supervision and inspection3 personnel who did not accept the technical disclosure to participate in the tower crane installation operation, their behavior violated the provisions of Article 21, paragraph 1 (1), (2) and (5) of the "Work Safety Law of the People's Republic of China", and they were responsible for the management of the accident, and were suspected of the crime of major liability accidents 2 Wang Hui, male, middle ** member,The executive deputy manager of the Jin Jianren Expressway Project of the Second Company of CCCC Second Harbor Bureau, performing the duties of the project manager and responsible for the overall work of the project。Failure to perform safety production management duties, failure to establish, improve and implement the safety production responsibility system, weak awareness of the legal system of safety production, and incomplete implementation of safety production rectification instructions issued by the competent department of the industry;After the accident occurred, he failed to report the accident to the local emergency management department and relevant departments in accordance with the regulations, and his behavior violated the provisions of Article 25, Paragraph 1 (5), (6), and (7) of the "Production Safety Law of the People's Republic of China," the second paragraph of Article 21 of the "Regulations on the Administration of Safe Production in Construction Projects," the first paragraph of Article 9 of the "Regulations on the Reporting, Investigation and Handling of Production Safety Accidents," and the provisions of Article 35, Paragraph 2 (9) of the "Measures for the Supervision and Management of Work Safety in Highway and Waterway Projects." Have management responsibilities and are suspected of the crime of major liability accidents. (4) Persons recommended for administrative punishment and Party and government disciplinary sanctions(See the original accident investigation report for details) Part 3
Identification of responsibilities and handling suggestions
1.Cui, the safety officer of the construction unit, when issuing the operation order,Failure to follow the requirements of the "Safety Production Assurance System and Responsibility System of a Construction Company" to make a safety technical disclosure to the border workers, in violation of the "Technical Code for Safety of Work at Height in Building Construction" (JGJ80-2016) 30.3. "Before the construction of high-altitude work, the operator should make a safety technical disclosure and should be recorded", and he is responsible for the occurrence of the accident, and it is recommended to deal with it seriously in accordance with the internal regulations of a construction company. 2.Wang, deputy project manager and actual person in charge of project construction, failed to inspect the implementation of the written disclosure of safety production of the team in accordance with the provisions of the "Safety Production Assurance System and Responsibility System of a Construction Company", failed to effectively supervise and inspect the safety production work of the construction project and eliminate the hidden dangers of production safety accidents in a timely manner, and was responsible for the occurrence of the accident, and recommended that the Changzhou Emergency Management Bureau impose administrative penalties on it in accordance with the provisions of Article 92, Paragraph 1 of the "Safety Production Law". 3.A construction company did not comply with the "Technical Code for Safety of Work at Height in Building Construction" (JGJ80-2016) 30.1. "In the construction of all those involved in edge and hole operations, climbing and suspension operations, operating platforms, cross operations and safety net erection, safety technical measures for high-altitude work should be made in the construction organization design or construction plan", the preparation of safety technical measures, failure to educate and supervise the construction personnel to wear safety belts correctly, responsible for the occurrence of accidents, it is recommended that the Changzhou Municipal Emergency Management Bureau implement administrative penalties in accordance with the provisions of Article 109, Paragraph 1 of the "Work Safety Law".
The original text of the accident investigation report is as follows: