After the accident, Chen Xudong, the secretary of the municipal party committee, immediately instructed the relevant departments to go to the scene to guide the accident disposal.
8.
Mayor Jiao Lansheng, Vice Mayor Gao Ruisheng and others arrived at the scene at the first time to inspect the accident, and required all efforts to rescue the injured and do a good job in the aftermath of the accident, such as comforting the family members.
Bind the lifted object firmly.
One place is unstable, resulting in overall collapse.
The process handover is unclear or there are loopholes in the construction process balance of multiple units.
When lifting or lowering a long cylindrical object, with the change of the object angle, the stress direction of the lifting nose is also changing, and this situation is not fully considered in the design and welding of the lifting nose, resulting in the sudden breaking (breaking) of the defective lifting nose in the lifting operation.
If the driver or commander of the operation does not respond in time, the accident will occur immediately, and this kind of accident has very bad consequences for operators and lifting equipment.
Fixing Socket Waved End Nail Plate
Next, let’s take a look at a case study of the overturning of lifting appliances: 21 safety points for the operation of lifting appliances.
The size and thickness of vertical plates shall be designed by technicians.
5.
3.
During the demolition operation, it is necessary to foresee the various factors encountered, such as the weight estimation of the object, the thoroughness of the cutting, the load added by the extrusion of the removed part, and the forced lifting of the connecting part without inspection.
They also convened a special meeting with the municipal departments of housing and construction, safety supervision, health care, transportation, public security, fire protection, etc., and set up a leading group for accident disposal, which required the relevant departments to seriously investigate the cause of the accident, carefully draw lessons from the accident, and draw inferences from one example, Deploy and carry out the city-wide special action for the investigation and treatment of potential safety accidents to avoid the recurrence of similar safety accidents.
4.
If some structures or platforms were removed by the previous shift but the handover after work is not clear, it is not clear whether the shed built by Zhang San can be used by Wang Wu.
7.
In this case, vertical plates shall be welded on both sides of the lifting nose in advance.
Inappropriate selection of lifting tools or lifting points.
Daily operation habits, performance, differences in command signals and other factors can easily lead to misoperation, so special caution should be taken.
12.
The steel rope wrapped on the drum of the crane or motor hoist is arranged loosely, causing the fast rope under heavy load to be pulled into the rope bundle, causing the fast rope to shake violently, which is very easy to lose stability.
The disconnection between the lifting and hoisting construction scheme and the actual operation is mainly manifested as incomplete content, lack of necessary data or construction method inconsistent with the actual operation, which makes the construction scheme become a shield to cope with the inspection of the superior, but does not play a role in guiding the construction.
Therefore, the position of the staff is very important.
The 2 injured people were sent to the hospital for treatment without life danger.
2.
If there is no safety rope, once they are injured by accidental vibration, impact or welding wire, it will cause serious consequences for the suspended objects to fall.
The construction is too busy to confirm the progress, and the crane station is not available for underground consultation; Before operation, the weight of the hoisted object was not confirmed correctly, and the hidden dangers such as leakage points of high-voltage lines, operating equipment, coal and oxygen pipelines in the surrounding environment and the safety warning signs of the Owner were not found in time, which caused great losses.
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Some equipment or components need to be suspended in the air before being fixed in place due to the requirements of the installation process, while some suspended objects stay in the air for a long time.
9.
The result is that the problem has occurred.
Unit A cut off the platform beam and Unit B continued to put heavy objects on the platform, resulting in overload of temporary support.
There is no theoretical calculation.
1.
The temporary lifting nose is not welded firmly (1) The welding strength of the temporary lifting nose is not enough.
The lifting work has ended.
The suspended objects in the air have not been sealed with safety ropes for a long time.
At about 4:12 p.m.
The tonnage of the guide pulley is too small, the rope of the tie pulley is too small, and the rope of the tie pulley is too thin, which causes the rope to break and fly after the force overload.
I don’t know what happened.
The lifting tools or pipes and structures estimated by experience have insufficient bearing capacity or local bearing capacity.
When lifting and removing from high altitude, “lock” rather than “pocket” shall be adopted for the lifted object; The sharp edges and corners of the hoisted object shall be “cushioned”.
There are many accidents that occur when the unloaded lifting sling accidentally catches objects.
At present, the cause of the accident is under investigation.
13.
As a result, the embarrassing situation that the operation continues to be dangerous and can not be stopped often occurs.
11.
(3) The welding material of the lifting nose is inconsistent with the base metal and the welding is conducted by informal welders.
6.
The drum is not tightly wrapped and the large parts are hoisted and removed.
(2) The stress direction of the lifting nose is single.
The lifting tools are set up or the lifting objects are lifted with the help of pipes and structures.
Correctly understand the safety factor of lifting slings During lifting operations, the correct understanding of the safety factor of lifting slings by the staff is often based on continuous use, resulting in that the overweight operation is always in a dangerous state.
10.
Different units and different types of cranes are often used.
Eradicate the wrong operation of hoisting operation, which is different from many construction operations and involves a large area.
When the hook is running with the empty rope sling, the lifting sling in the free state catches the lifted object or other objects that have been unhooked.
The selection of pulley and rope is unreasonable.
The insufficient welding strength mentioned here refers to the fact that the surface of the welding base metal is rusted, and the rust spots are not completely removed before welding, resulting in the appearance of the weld meat is beautiful and solid, while the actual weld meat and the base metal are not fused at all, and the load increases or is impacted, resulting in fracture.
on August 13, a heavy crane at the reconstruction site of Changjiang North Road, East District, Zhongshan City, Guangdong Province, rolled over at the construction site, and the lifting arm hit a car running under it, resulting in 4 deaths (2 male adults, 1 female adult and 1 boy) and 2 injuries (all male adults).
When the lifting tool is set up, the understanding of the force change of the pulley and the rope of the tie pulley caused by the change of the included angle of the fast rope is insufficient.
They should not only pay attention to each other at all times, but also remind each other and check the implementation to prevent accidents.
It is very dangerous to stand under the boom, under the lifting object, in the front area of the lifted object, in the triangle area of the steel rope of the guide pulley, around the fast rope, and in the stress direction of the inclined hook or the guide pulley.
14.
