Zhu Xiaobao, the actual person in charge of jiuque studio, handed over the professional construction drawings of the main structure of the project to Zhang Wei for design, and Zhang Wei handed over the professional construction drawings of the steel structure roof of the banquet hall to Chen Binhong for design.
During the review, the Design Institute of Zhongheng group did not find any inconsistency between the steel structure roof design of the banquet hall and the construction practice.
At about 13:20, when pouring and tamping to ⑫ – ⑯ axis intersection axis, the whole roof of ⑩ – ⑯ axis intersection axis steel structure collapsed.
At the time of the incident, Wang Jun quickly fled to safety.
At about 13:00 p.m., there were 13 people on the working surface, including 10 workers in the masonry team who carried out concrete pouring and tamping between the ⑫ – ⑯ axis, one worker who prepared the surface finishing work of the polishing machine on the roof of the ⑩ – ⑪ axis, Wang Jun, the pump worker of the concrete company, remotely operated the blanking of the concrete pump pipe at the position of the ⑯ axis, and Du Wanglong, the manager, led the shift on the north side of the ⑩ axis.
The planned pouring thickness is 50mm, pouring from the direction of ⑩ axis to ⑯ axis, and the concrete is transported to the pouring position by truck pump.
The design drawings were approved, signed and sealed.
Your city should deeply draw lessons from the accident, draw inferences from one instance, and pay close attention to the rectification of potential problems.
Add construction projects to the above points, and those who build houses for large families can make a living; Those who build dreams build the glory of the country; Heaven should be on the top, and the people should be on the bottom; Take on this great cause and don’t forget.
After about 9:00 on November 23, 2021, Li Zhiyong, the construction Mason team leader of hupanli project, and 11 workers, including he Youliang, Wang Fuping and Li Zhaoya, carried out the construction of C20 fine aggregate concrete rigid protective layer on the steel structure roof of the hotel banquet hall.
The Provincial Construction Commission Office is requested to strengthen business guidance and urge Jinhua City to seriously carry out accident investigation, cause analysis and other related work.
The accident investigation team determined that the “11.23” collapse accident of hubinli project in Jinhua Economic and Technological Development Zone was a major production safety responsibility accident caused by major errors in the design of roof steel structure and failure to construct according to the design drawings reviewed by the construction drawings.
Jinhua Municipal People’s Government: on November 23, 2021, a major steel structure collapse accident occurred at the construction site of “hubinli” project in Jinhua development zone.
Eliminate the possibility of accidents caused by natural disaster factors such as earthquake and bad weather..
Your city shall immediately organize and carry out accident investigation, quickly find out the cause of the accident, and study and put forward handling opinions in strict accordance with the requirements of the accident investigation regulations in accordance with the relevant provisions such as the provisions of Zhejiang Province on reporting, investigation and handling of production safety accidents.
Due to the lack of coordination between the architectural design of Heyi company and the structural design of jiuque studio, the load of structural practice in the architectural design and construction drawing is not taken into account in the steel structure construction drawing design.
On November 25, the emergency management department of Zhejiang Province issued a notice of supervision on the investigation and handling of major production safety accidents, which showed that on November 23, 2021, a major steel structure collapse accident occurred at the construction site of “hubinli” project in Jinhua development zone.
According to the investigation of the direct cause of the accident, the meteorological data of Jinhua on the day of the accident is that the temperature is 4 ~ 12 ℃, the westerly wind is grade 1 ~ 2, and there is no precipitation.
After the accident, the leading comrades of the provincial Party committee and the provincial government attached great importance to it and made important instructions successively.
Du Wanglong fell on the inner scaffold, and the other 11 workers fell from the roof to the third floor.
Schematic diagram of steel roof and distribution of operators project design and drawing review in August 2020, Wang Baojun subcontracted the design task of lakeside project to Heyi company, with Jiang Chuanmin as the leader of the design project.
Before the accident is closed, the accident investigation report (not finalized) shall be submitted to the Provincial Safety Commission Office for review and approval, and then your city shall be responsible for approving and closing the case and publishing it to the public; After the case is closed, the implementation of the accident investigation report and accident handling decision shall be reported to the provincial safety committee office for filing in time.
Your city should deeply draw lessons from the accident, draw inferences from one instance, and pay close attention to the rectification of potential problems.
As of 8:00 on November 25, a total of 6 people were killed and 6 injured.
As of 8:00 on the 25th, 6 people were killed and 6 injured.
At about 13:20 on November 23, 2021, the steel structure roof of the hotel banquet hall of hubinli project under construction in Jinhua Economic and Technological Development Zone collapsed during the concrete pouring and tamping construction of the rigid protective layer, resulting in 6 deaths and 6 injuries and a direct economic loss of 10.9755 million yuan.
Contact person and Tel.: Zhou Chengcheng, 0571-87055020.
On August 24, Jiang Chuanmin successively sent the design drawings of various disciplines of the project to the Design Institute of Zhongheng group for review.
After the accident, the leading comrades of the provincial Party committee and the provincial government attached great importance to it and made important instructions successively.
In the architectural construction drawing design, the roof structure of the banquet hall is 50mm thick C20 fine aggregate concrete rigid protective layer, non-woven fabric isolation layer, 3mm thick waterproof coiled material, 1.5mm thick waterproof coating, 20mm thick cement mortar leveling layer, 120mm thick rock wool board insulation layer, galvanized steel wire mesh and 1.2mm thick steel base plate from top to bottom.
In August 2020, Heyi company subcontracted the design of structural construction drawings to jiuque studio.
In the process of drawing design, the construction drawing design of the steel structure of the banquet hall roof is based on the structure of color steel tile, sandalwood strip and steel beam, and the dead load is 0.3kn/m2.
Before November 25, 2021, the office of Zhejiang Provincial Work Safety Commission has approved and published the investigation report on the “November 23” major collapse accident of hubinli project in Jinhua Economic and Technological Development Zone.
After research, the provincial safety committee office decided to supervise the investigation and handling of the major accident.
