The counterweight of a tower crane in Jinwan, Zhuhai fell, but fortunately there were no casualties!
Warning: The fall of the tower crane counterweight is not only easy to cause injury to the people below, but also easy to cause the tower crane to collapse or the boom to break!
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Accident case: At 14:10 on January 1, 2019, at the construction site of the coal gasification optimization construction project of Tianjin XX Company, 6 operators of Tianjin Dingye Construction Machinery and Equipment Leasing Company were in the process of overhauling and maintaining the tower crane, and the tower crane counterweight fell off and the boom broke, resulting in 1 death and 4 injuries.
Is it important to connect the tower crane with it?
Here, we don't talk about the norms, we don't talk about the manual, we talk about the reality. Counterweight falling off is not the first accident, the probability is very low, isn't safety management to prevent those low-probability events...... Let's connect together!
Don't assume that the weight will not fall, and when there is side shift and shaking, the weight will also slip. (Caused by pin falling off, side shift and falling)
Don't assume that the weight will not fall, and when there is side shift and shaking, the weight will also slip. (Caused by pin falling off, side shift and falling)
Common practices for fixing counterweights:
(Image source: special equipment safety inspection, use and maintenance)
Iron plate connecting blocks
Wire rope tandem
Wire rope tandem + wooden plugging
Some projects have tower crane reduction booms. In the case of the reduction of counterweight, special reminder: pay attention to protective measures in the notch part of the counterweight reduction!
It is very important to fix the tower crane counterweight to ensure the safety of the tower crane foundation. There are often counterweight falling and injuring people on the Internet, it can be seen that the counterweight is firmly fixed is one of the important matters for the safe operation of the tower crane, the counterweight is fixed firmly not only safely, but also reduces the shaking of the tower crane, maintains the stability of the tower crane, and reduces the noise of the tower crane, the impact of the counterweight "bang" is not only loud but also scary, so how to prevent the fall of the tower crane counterweight?
1: Use the coupling iron plate to fix
2: Use the wire rope to pull forward to prevent slipping
Three: the wire rope and the wooden wedge are consolidated at the same time
Four: slope design, using self-weight forward extrusion and fixation
Five: fence protection to prevent the counterweight from slipping
There are many ways to prevent slipping, but the main purpose of the unification is to connect the counterweights together to form a whole, which is firmly fastened to ensure that it does not slip.