On March 21, 2019, 4 people were killed and 13 injured in a steel bar dumping accident at the Aircraft Taxiway Bridge project of Chengdu Shuangliu International Airport.
On May 6, 2018, the cooling water pipe of air conditioning in the underground parking lot on the negative first floor of Wanda Plaza in Changshu, Jiangsu Province, suddenly fell off, resulting in three deaths.
On December 29, 2014, three projects, such as A gymnasium of secondary school affiliated to Tsinghua University, collapsed suddenly during the binding of steel bars on basement floor, resulting in 10 deaths and 4 injuries.
All the above accidents are caused by local instability or damage of components, and then the domino effect will cause serious consequences. The reasons for the accidents are different: technicians are not on duty, there are no construction schemes or construction schemes and no construction technology submission; non-professional technicians organize the construction by means of "experience" doctrine; site managers lack supervision, workers try to save energy and conveniently violate the operation sequence, brutal construction and so on.
We should earnestly draw lessons from the above accidents and do the following in the daily management of the project:
1. Personnel in key positions of the project (especially technicians) must be in place. The professional level of technicians should conform to the requirements of the project, and they should not oversupply the number. Technicians should strengthen the study of norms and professional knowledge, especially the study of material mechanics and structural mechanics and the accurate application of computational models.
2. Do a good job in the preparation, examination and approval of various construction schemes. We can't formulate a construction plan in the form of formalism. One set of construction plans and another set of actual construction on site should be adopted. In particular, the construction of large and dangerous projects must be carried out in strict accordance with the requirements of the construction plan.
3. Carefully make the construction technology submission, and the construction technology submission should be carried out in different levels. Managers and constructors at all levels should be fully aware of the construction procedures, construction methods and acceptance requirements, resolutely put an end to empirical construction, and strictly prohibit arbitrary violation of the order of operation and brutal construction. Site managers should carefully inspect and supervise, and earnestly perform their duties. Once they find out that they violate the operation sequence and brutal construction, they should stop in time. They should not take chances and turn a blind eye to it.
4. In case of change, the procedure of design change or technical approval should be completed in time. Construction cannot be organized without the signature and confirmation of the design unit, supervision unit and construction unit. Once an accident occurs, the consequences will be borne by the construction unit, which will cause great losses to the enterprise. (Chen Lei)