At 7:50 on November 26, 2023, an electric shock accident occurred in the construction project of Yuanzhuo Hengxin Trading Co., Ltd. (hereinafter referred to as Yuanzhuo Trading Company) in the construction project of cold storage and fresh-keeping storage for agricultural products under construction in Dashan Community, Qunan Street, Quxian County, Dazhou City, Sichuan, resulting in 4 deaths and direct economic losses of 5.328 million yuan.
Recently, the website of the Dazhou Emergency Management Bureau in Sichuan Province published an investigation report on the accident. The investigation team determined that the accident was a production safety liability accident.
01 What happened to the accident
At around 7:30 on November 26, 2023, Yong Shangguo and Xiao Yunchun successively arrived at the construction site of the agricultural product cold storage and fresh-keeping project of Haosen Cooperative to organize construction management, and Wang Lin organized on-site workers to paint and weld the steel frame shed.
At about 7:50, Xiao Yunchun went to the side to direct the crane, Yong Shangguo connected the water pipe next to the mixer at the construction site, Wang Lin, Yi Enwan, Wang Rong, Du Biao 4 people (engaged in welding operations) pushed the 8.95m high mobile operating platform to another steel structure shed during the construction process, accidentally touched a 10KV high-voltage transmission line with a height of 7.96m above the ground across the construction site, forming a single-phase electric shock, resulting in 1 person dying on the spot, and the other 3 people were sent to the hospital for rescue and died.
Overview of the project construction site
02 Cause of the accident
(1) The direct cause of the accident
1. Operators set up mobile operating platforms in violation of regulations. According to Article 6.2.1 of the "Technical Code for Safety of Work at Height in Building Construction", the area of the mobile operating platform should not be greater than 10 square meters, the height should not be greater than 5m, the height and width ratio should not be greater than 2:1, and the construction load should not be greater than 1.5KN/square meters. The height of the mobile operating platform is 8.95m, the width is 0.95m, the length is 1.85m, the height-to-width ratio is 9.4:1, and the erection height and height-to-width ratio exceed the specifications. The height of the high-voltage line at the electric shock point of the accident at the scene was 7.96 meters, and the mobile operating platform erected illegally was 0.99m higher than the 10KV wire.
2. On-site operators operate in violation of regulations and risks. Due to the disorderly stacking of materials on site, the horizontal distance between the insulation board and the high-voltage line stacked on the spot is only 2.3m gap, and when the 4 workers forcibly pushed the mobile operating platform higher than 0.99m of the 10KV wire from this gap, they did not carefully observe the potential risk factors around them, resulting in the upper end of the operating platform touching the 10KV wire, resulting in 4 people being electrocuted.
The mobile operating platform and the 10KV three-material branch line involved in the incident
(2) Indirect causes of the accident
1. The main responsibility of Yuanzhuo Trading Company for safety production is not implemented. The safety production responsibility system is not implemented, and the safety management system is seriously lacking; The safety education and training of employees is not in place, and the employees employed have weak safety awareness and lack of basic safety knowledge; The investigation of risks and hidden dangers is not in place, and the identification of on-site safety risks is insufficient; On-site management is not in place, and the dangerous operation behavior of operators is not corrected in time; Construction operations in the 10KV power line protection area, without fulfilling the approval procedures to the competent department of the power industry, risky operations.
2. Illegal contracting or subcontracting of projects. Yuanzhuo Trading Company without corresponding construction qualifications built the project, and Yuanzhuo Trading Company contracted the construction of the project to Xiong Zhili, an individual without construction qualifications and steel structure engineering professional contracting qualifications, and Xiong Zhili subcontracted the project construction to Yongshangguo, an individual without labor company qualifications, to undertake the construction of civil engineering and steel structure sheds; Yong Shangguo subcontracted the construction of the steel structure project to Wang Lin and others who did not have a "welder special operation certificate" to carry out construction operations. Illegal contracting and subcontracting of projects lead to the inability to effectively supervise the quality and safety of the construction process.
3. Huacong Real Estate Company is not in place to fulfill the responsibility of maintaining and managing property rights lines. Huacong Real Estate Company, as the property right unit of the 10KV South-South Line 986 Road Sancai Branch, has not implemented the safety management system and safety responsibilities, and has not effectively prevented the operation of the high-voltage transmission line that should know that the safety protection distance of less than 5 meters from the high-voltage line may endanger the safety of the high-voltage transmission line, nor has it been reported to the power supply enterprise and the power department. Without the consent of the power supply company, it illegally provided temporary construction electricity for Yuanzhuo Trading Company.
4. The management of the local party committee and government and relevant departments is not in place. The safety inspection of the Qu County Party Committee and the relevant departments at the county level, the Party Working Committee, the sub-district office and the working institutions of Qu Nan Street has not been implemented, and the investigation and management of safety risks and hidden dangers have not been carried out in depth.
03 The accident involved the main problems of the relevant enterprises
(1) Yuanzhuo Trading Company
1. The main responsibility of the enterprise for production safety is not implemented. The enterprise lacks a safety production responsibility system, management organization, rules and regulations, etc., and has not established a safety production management organization or equipped with full-time (part-time) safety production management personnel, and has not established a safety production responsibility system, safety production rules and regulations and operating procedures.
2. Contracting construction projects in violation of regulations to individuals without construction and installation qualifications, and failing to supervise the quality and safety of the construction process.
3. Security risk identification and control are not in place. Failure to establish a working mechanism for safety risk identification and hierarchical control, and failure to organize risk identification of risk factors and places involved in the construction process.
4. Investigation and rectification of hidden dangers are not in place. Failure to establish, improve and implement a system for the investigation and management of hidden dangers of safety production accidents, and failure to take effective control measures for safety risks and hidden dangers existing on the construction site.
5. Safety education and training are not in place. Failure to organize the formulation and implementation of safety production education and training plans, failure to carry out safety education and training for employees, and lack of safety knowledge among employees.
(2) Sichuan Huacong Real Estate Co., Ltd
1. The main responsibility of enterprise safety is not implemented, the responsibility of safety production is not strictly implemented, and the safety production management system is not established and improved. The responsibility for the maintenance and management of the high-voltage line is not clarified.
2. The edge of the steel structure shed on the site is 2.8 meters away from the horizontal distance of the high-voltage line, and the nearest place is 2.4 meters, which has been less than 5 meters of safety protection distance, and there is an operation that may endanger the safe operation of the high-voltage line.
3. Illegally provide temporary construction electricity for Yuanzhuo Trading Company without the consent of the power supply enterprise.
04Suggestions for handling accident related personnel
(1) Recommend that the judicial organs handle the personnel
1. Xiong Zhili, male, 59 years old, from Qu County, Dazhou City, is an individual who undertook the construction of the project, is responsible for the overall work of the project, did not carry out effective safety management on the construction site, did not conscientiously perform the safety production management duties, and has the main management responsibility for the accident, suspected of committing a crime, and the public security organs have filed a case for investigation.
2. Yong Shangguo, male, 61 years old, from Qu County, Dazhou City, illegally contracted and subcontracted steel structure projects, was responsible for construction site management, did not obtain the safety production knowledge and management ability assessment certificate, did not carry out effective safety management on the construction site, did not conscientiously perform safety production management duties, and bore important management responsibility for the accident, suspected of committing a crime, and the public security organs have filed a case for investigation.
3. Xiao Yunchun, male, 59 years old, from Qu County, Dazhou City, responsible for construction safety and quality management, did not obtain the safety production knowledge and management ability assessment certificate, did not carry out effective safety management on the construction site, did not conscientiously perform safety production management duties, and bore important management responsibility for the accident, suspected of committing a crime, and the public security organs have filed a case for investigation.
(2) Suggestions for handling the relevant responsible personnel of the accident
1. Fu Youneng, male, 55 years old, from Qu County, Dazhou City, is the legal representative of Qu County Yuanzhuo Hengxin Trading Co., Ltd. (the actual controller of the company is Xiong Zhili), did not effectively perform the safety duties of the main person in charge of the enterprise, and supervised and inspected the safety production work of the unit was not in place. It bears the main management responsibility for the occurrence of this accident, and it is recommended that the emergency management department of Dazhou City give administrative punishment in accordance with the law.
2. Gong Cheng, male, 36 years old, from Dachuan District, Dazhou City, is the legal representative of Sichuan Huacong Real Estate Co., Ltd., did not conscientiously perform the safety duties of the main person in charge of the enterprise, did not establish and improve the safety management system, did not implement the safety responsibility system, did not set up a safety production management organization or equipped with full-time (or part-time) safety production management personnel, and did not carry out effective safety management of transmission lines within the scope of property rights. It bears the main management responsibility for the occurrence of this accident, and it is recommended that the emergency management department of Dazhou City give administrative punishment in accordance with the law.
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Falls from heights, strikes from objects, electrocution
Mechanical damage, collapse
It is an injury accident that often occurs during construction
How to avoid accidents?
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01 Fall from a height
Falling from height, also known as falling from height, refers to the casualty accident caused by falling during work at height. Work at height refers to the work carried out at a height where there is a possibility of falling at a height of more than 2m (including 2m) from the datum of the falling height.
Preventive measures for accidents at height
1. To avoid falling accidents from heights, safety helmets, safety belts and safety nets must be equipped.
2. The clothing of workers working at height should comply with the regulations, and they should not be naked. Workers should wear soft-soled non-slip shoes under their feet, and must not wear slippers, hard-soled shoes and boots with spikes that are easy to slip. During operation, it is necessary to strictly abide by various safety operation procedures and labor discipline.
3. Climbing and suspended operations (such as scaffolding workers, structural installers, etc.) personnel are more dangerous, so such personnel should be trained and examined, and then hold the certificate after obtaining the certificate.
4. The materials used in high-altitude operations should be stacked smoothly, and should not be placed near the edge or hole, nor should they obstruct the passage and loading and unloading.
02 Object strike
Object strike refers to the movement of an out-of-control object under the action of other external forces such as inertial force or gravity, hitting the human body and causing personal injury or death.
Preventive measures against accidents with object strikes
1. Set up a cordon and warning slogans at the construction site.
2. Do a good job in safety education and safety technology disclosure.
3. Clean up the debris in the scaffold safety net (horizontal support net), and set up safety protection and foot guards as required.
4. Strictly implement the safety and civilized management regulations of the construction site, and ensure that the site is clear after the completion of the work.
5. Try to avoid three-dimensional cross operations.
03 Electric shock
Electric shock refers to an accident in which a person feels pain or even is injured when they are in direct contact with electricity.
Precautions against electric shock accidents
1. The construction site implements the "three-phase five-wire system" and uses it correctly according to the regulations.
2. Electrical, gas welding, and electrical work must be trained and assessed and certified to work.
3. Do not move machinery and equipment with power cords with electricity.
4. All mechanical equipment needs to be grounded and zeroed, and leakage protection measures should be installed.
5. Do a good job of safety insulation measures for electrical operations.
6. Hang safety warning signs in electrical boxes and other electrical hazards.
7. Logistics, living areas, and construction sites shall not be privately connected to wires.
04 Mechanical Damage
Mechanical injuries mainly refer to injuries in the form of pinching, collision, shearing, involvement, twisting, grinding, cutting, and stabbing caused by direct contact between moving (stationary) parts, tools, and workpieces of mechanical equipment and the human body.
Preventive measures for mechanical injury accidents
1. The mechanical equipment should be installed and fixed firmly.
2. Add mechanical safety protection devices and power-off protection devices.
3. Regular maintenance and repair of machinery and equipment to maintain good operating condition.
4. Frequent safety inspection and debugging to eliminate the uneasy factors of mechanical equipment.
5. The operator should operate according to the regulations, and it is strictly forbidden to operate in violation of regulations.
05 坍塌
Collapse refers to the injury or casualty accident caused by the external force or gravity of the object, exceeding its own strength limit or due to the destruction of structural stability.
Precautions against collapse accidents
1. Strengthen the daily inspection and maintenance of scaffolding, focusing on checking the changes of the foundation of the scaffolding, the stress of various supports and structural connections.
2. When the front foundation of the scaffold is subsided or the construction needs to be hollowed out, reinforcement measures should be taken according to the specific situation.
3. When the hidden danger endangers the stability of the frame, it should be stopped immediately, and targeted measures should be formulated to strengthen the treatment within a time limit.
4. In the process of supporting the tower and dismantling operations, it should be carried out in strict accordance with the regulations and working procedures.
It has now entered the flood season
How to do a good job in the prevention and control of construction safety risks in the flood season?
Please keep this set of tips away
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Source: Ministry of Emergency Management of the People's Republic of China
Editor/Producer: Wang Xiaolu
Reviewer: Li Man
Review: Liu Chunxiang