Another design institute has suffered!
At about 18:36 on August 5, 2023, a fire broke out in Jiangxi Zhongnan Environmental Protection Equipment Co., Ltd., Ganzhou Economic and Technological Development Zone, Jiangxi Province, with a fire area of about 700 square meters.
After investigation, the design unit (Jiangxi Provincial Co-construction Engineering Design Institute Co., Ltd.) did not clarify the connection between the retaining wall and the steel structure in the design documents, and failed to explain the design intent and explain the design documents to the construction unit and the supervision unit before construction, resulting in a reduction in the quality of the construction project at the source.
The report shows that the actual person in charge and the legal representative of the design institute of the project are suspected of committing a crime and are recommended to be transferred to the judicial authorities for investigation.
Recently, the Jiangxi Provincial Emergency Management Department announced the "8.5" General Fire Accident Investigation Report of Jiangxi Zhongnan Environmental Protection Equipment Co., Ltd. in Ganzhou Economic Development Zone.
The investigation report shows that Long Mousheng, the project leader of the construction unit, does not have a construction engineer certificate. At present, five people, including the construction unit and the legal person of the construction unit, have been criminally detained, and four people, including the person in charge of the design unit, have been transferred to the judicial organs.
What happened to the accident
At about 15 o'clock in the afternoon of August 5, 2023, according to the construction arrangement of the "Plant Renovation Project", Xiong Mouhua, the construction team leader, led 10 construction personnel such as Zhang and Li Mouping, divided into 4 groups to work in different positions in the 2# workshop. Among them, Zhang and Li Mouping carried out gas cutting and installed overhead crane track operations at the G-axis position in the factory.
At about 18:36, Xiong Mouhua, who was checking the construction situation in the workshop, found that the PPR tank (tank height of about 4 meters) located in the PPR tank (about 4 meters high) located in the second column (G axis) in the northeast to southwest direction and the 14th (G-14) steel column in the northeast to southeast direction of the plant was on fire.
The process of starting the fire (video screenshot)
At 18:42, the command center of the Ganzhou Fire and Rescue Detachment received an alarm, and successively dispatched fire trucks and rescue personnel to the scene to deal with it, and the detachment's full-service headquarters was dispatched.
At 19:12, the outer wall on the northeast side of the plant collapsed outward in an instant (the length of the collapse was about 175 meters), and the on-site safety officer immediately issued an emergency evacuation order, but because there was no warning of the collapse, 17 commanders and fighters could not avoid danger and were injured or buried by the collapsed wall. In the end, 2 people were killed and 15 were injured (all firefighters).
The cause of the accident
(1) Determination of the cause of the fire
The cause of the fire was comprehensively determined to be: during the upgrading and renovation of the steel structure of the 2# workshop (G-D axis of the plant) leased by Zhongnan Environmental Protection Company, the gas cutting operators carried out unlicensed illegal thermal cutting operations in the area above the fire point, and the high-temperature metal slag that fell from the splash ignited the PPR tank and other combustibles placed in the 1# workshop (G-K axis of the plant) immediately below the working face, causing a fire.
On-site investigation and experiments
(2) Analysis of the causes of wall collapse
Through the on-site inspection, testing and identification of the collapsed wall and expert demonstration, it is comprehensively determined that the factors that cause the overall collapse of the outer retaining wall of the plant are mainly internal causes and inducements.
1. There are congenital defects in the engineering quality of the outer retaining wall of the plant, and there are serious safety hazards.
- are not effectively connected with the main body steel frame;
- The perimeter retaining wall does not meet the requirements of the code;
- The concrete compressive strength of the perimeter retaining wall foundation beam, and the reinforcement lap anchorage of the structural column and window lintel do not meet the requirements of the code.
2. There are no fire protection measures for the main steel structure of the plant, which fails to delay the heating process of the steel structure.
After testing and identification, there is no fireproof protective coating on the surface of the main steel structure of the plant, which does not meet the design requirements, resulting in the outward tilt of the wall under the fire state, the use of over-design conditions of the steel structure and the technical transformation, etc., which are important inducing factors for the overall overturning and collapse of the wall.
The parapet wall on the northeast side of the plant collapsed as a whole
(3) Causes of casualties of fire and rescue personnel
1. There are major safety hazards in the building structure. There is a hidden danger of insufficient stability of the collapsed wall, and there are serious structural safety hazards in the masonry peripheral retaining wall structure due to the design and construction of the relevant national regulations.
2. The overall overturning and collapse time is short and the harm is great.
The fire engine was badly damaged
3. The combat operation surface of fire fighting is limited. The circular lane on all sides of the fire plant is only the northeast lane to facilitate the operation of fire fighting vehicles, and the combat development of fire rescue vehicles is limited, and the vehicle parking position is close to the outer parapet wall of the plant, so it is impossible to reserve enough safety distance.
Schematic diagram of fire extinguishing operations
The accident related to the main problems exposed by the enterprise
1. Jiangxi Zhongnan Environmental Protection Equipment Co., Ltd. (the lessee of the burning plant and the controlling shareholder of Sumitomo Elevator Company)
(1) Weak security awareness.
(2) The main responsibility for production safety is not implemented.
(3) Organizing production in violation of regulations.
2. Jiangxi Sumitomo Fuji Elevator Co., Ltd. (construction unit)
(1) Failure to conscientiously fulfill the primary responsibility for the quality of the construction unit.
Entrusting the project supervision task to the Zhengdong supervision company that has an equity relationship with the construction unit, resulting in the on-site construction supervision workflow being a formality, and the design, construction and supervision units are arranged to arrange personnel without relevant qualifications to participate in on-site management and completion acceptance, resulting in serious hidden dangers in the quality of plant construction projects;
(2) Change the use of the plant at will.
(3) Organizing plant heightening and renovation projects in violation of regulations
3. Jiangxi Changding Construction Engineering Co., Ltd. (construction unit)
(1) The main responsibility for production safety is not implemented
(2) Illegally arranging Long Mousheng, who had not obtained the qualification certificate of the constructor, to serve as the person in charge of the project
Six people, including Zhang and Li, who had not obtained the qualification certificate for special operations, were hired to carry out electrical welding and hot work, and the combustibles at the operation site were not cleaned up, resulting in a fire accident.
4. Ganzhou Dongxin Construction Engineering Co., Ltd. (construction unit)
(1) Allow others to undertake projects with the company's qualifications
(2) Failure to carry out construction in accordance with design drawings and relevant technical standards
(3) Failure to arrange personnel with construction engineer qualifications to serve as the project leader and participate in the completion and acceptance of the plant.
5. Ganzhou Zhengdong Engineering Construction Supervision Consulting Co., Ltd. (Supervision Unit)
(1) The project supervision is a formality, and the obligations are not fulfilled in accordance with the supervision contract, and a person who does not have the supervision qualification is appointed to be responsible for on-site supervision
(2) Neglect of supervision and management of the construction unit;
(3) Arrange personnel who do not meet the requirements to participate in the completion and acceptance of the plant in violation of regulations.
6. Jiangxi Provincial Co-construction Engineering Design Institute Co., Ltd. (design unit)
(1) The design documents do not meet the requirements of the specification
The construction drawing design documents of the Sumitomo plant issued by the Sumitomo plant were not strictly controlled, the connection between the retaining wall and the steel structure was not clarified in the design documents, and the design intent and design documents were not explained to the construction unit and the supervision unit before construction, resulting in a reduction in the quality of the construction project at the source;
(2) The management of the company's electronic signature is chaotic.
7. Ganzhou Xinzhu Construction Project Construction Drawing Design Review Co., Ltd. (Sumitomo Elevator Plant Construction Project Design Drawing Review Agency)
(1) The review of construction drawings is not strict.
Suggestions for dealing with the personnel and units responsible for the accident
Persons who have been subject to compulsory measures by judicial organs
1. Ling Moufeng, male, the legal representative of Sumitomo Elevator Company, did not implement the main responsibility for production safety, and was directly responsible for the accident. He was criminally detained on August 6, 2023 on suspicion of the crime of major liability accidents.
2. Huang Mouzhong, male, the legal representative of Zhongnan Environmental Protection Company, does not implement the main responsibility for production safety, and is directly responsible for the accident. He was criminally detained on August 6, 2023 on suspicion of the crime of major liability accidents.
3. Hu Mouqi, male, legal representative of Changding Engineering Company, the main responsibility for production safety is not implemented, and he is directly responsible for the accident. He was criminally detained on August 6, 2023 on suspicion of the crime of major liability accidents.
4. Zhang, male, a construction worker employed by Changding Engineering Company, carried out gas cutting operations before the accident and was directly responsible for the accident. He was criminally detained on August 6, 2023 on suspicion of the crime of major liability accidents.
5. Li Mouping, male, a construction worker employed by Changding Engineering Company, carried out gas cutting operations before the accident and was directly responsible for the accident. He was criminally detained on August 6, 2023 on suspicion of the crime of major liability accidents.
Persons recommended to be transferred to judicial organs for handling
1. Liu Mouming, male, the actual person in charge of the Ganzhou Branch of Jiangxi Provincial Co-construction Engineering Design Institute Co., Ltd., and the actual person in charge of the design of the plant construction project of Sumitomo Elevator Company. The design of the construction drawings of the Sumitomo Elevator Company's plant project did not meet the requirements of the relevant standards and specifications, and its behavior was suspected of a crime, and it was recommended that it be transferred to the judicial authorities for investigation.
2. Xu Moujun, male, legal representative of Jiangxi Provincial Co-construction Engineering Design Institute Co., Ltd. The construction drawing design of the Sumitomo Elevator Company's plant project issued did not meet the requirements of relevant standards and specifications, and it was responsible for the serious consequences caused by the collapse of the wall. His behavior is suspected of being a crime, and it is recommended that he be transferred to the judicial organs for filing and investigation.
3. Li Mousheng, male, the actual person in charge of the construction of the plant of Sumitomo Elevator Company. Borrowing qualifications to contract engineering projects, and there are serious quality problems, and the main responsibility for the serious consequences caused by the collapse of the wall. His behavior is suspected of being a crime, and it is recommended that he be transferred to the judicial organs for filing and investigation.
4. Long Mousheng, male, employee of Changding Engineering Company, person in charge of the construction site of the plant heightening and renovation project of Sumitomo Elevator Company. Failure to obtain the construction engineer qualification certificate, arranging personnel who have not obtained the safety officer certificate to serve as on-site safety production management, employing construction welder certificates who have not obtained the special operation qualification certificate to engage in electro-oxygen welding operations, failing to identify the risks and hidden dangers of the electro-oxygen welding hot work site, and being mainly responsible for the occurrence of the fire. His behavior is suspected of being a crime, and it is recommended that he be transferred to the judicial organs for filing and investigation.
It is recommended that those held accountable accountable
The accident investigation team handed over to the discipline inspection and supervision organs for further investigation and handling of clues such as problems in the performance of duties by public officials of local party committees, governments, and relevant departments discovered during the investigation of the accident.
Units and individuals recommended to be given administrative punishments
7 units and 18 people were given administrative punishments in accordance with relevant laws and regulations.