Pay attention to the construction process of electric hoist

Electric hoist is a powerful lifting device that is widely used in construction, transportation and other industries. It is made up of a huge steel structure, and the stability of the electric hoist is crucial. In the electric hoist accident, the collapse of the column type electric hoist occupies a considerable proportion, which is caused by the destruction of the electric hoist foundation. Therefore, in order to avoid the occurrence of tower crane accidents, what problems should be paid attention to the construction of electric hoist foundation

According to the analysis of the production and use of electric hoist, there are three reasons for the basic accident of electric hoist:

1. Some construction sites have to catch up with the construction period. In the case of insufficient concrete strength and installation rush, the crane is subjected to ground stress restrictions, resulting in collapse and overturning unfortunate events;

Second, in some construction units near the tower crane foundation excavation work leads to landslides and even caused by the tower crane accident displacement;

Third, the reason is that in recent years, groundwater in many cities in China has caused excessive groundwater drainage, resulting in uneven settlement, which affects the operation and construction of electric hoists.

Therefore, in order to prevent the electric hoist collapse accident, the construction unit must ensure that the durability of the electric hoist meets the design requirements, the foundation of the electric hoist, and the strength of the reinforced concrete at least 80% of the design value, and the tower crane foundation of the basement project should also Take special treatment measures such as piling on the foundation and reinforce the pile end and the foundation bolts must be welded firmly together.

The bottom surface of the concrete foundation shall be smooth and solid, and shall not enter the bottom of the pot. The dimensional error of the anchor bolts must strictly conform to the requirements of the basic drawings. The anchor bolts shall be of sufficient ground length. Each floor bolt shall have a double nut pre-tightening. The foundation surface shall be installed to ensure that the base layer does not exceed 1 / 1000. At the same time as the basic treatment, the foundation of the tower crane cannot accumulate, and Water accumulation can cause uneven settlement of the tower crane foundation. On the basis of the electric hoist, it is not allowed to dig or ditch at will.