In the system of people and tower cranes, people are the main body and play a leading role. It is necessary to make the tower crane driver clearly aware that whether the operation safety is in place is a matter of life and death for some people on the construction site, and the responsibility is significant. It is necessary to always put people first, operate carefully, and do everything possible to prevent the occurrence of malignant accidents such as tower crane imbalance, collision, overload and overturning. Next, Sichuan Tower Crane Rental will tell you that tower crane drivers must master basic safety knowledge and skills

1. Prevention of tower collapse

Overturning a tower is the overturning of a tower crane, and its fundamental reason is the excessive torque, which means that the overturning torque of the tower body exceeds its stable torque. The overturning moment is related to factors such as the rotational centrifugal force of the tower weight and lifting weight, wind force, and the horizontal component of the tower weight formed by the slope of the track; Tower crane drivers should attach great importance to it, refine the security inspection content of tower collapse prevention into their own safety behavior guidelines, and consciously and strictly implement them

(1) It is necessary to eliminate the illegal behavior of torque limiter failure or use without proper adjustment. The torque limiter can only operate when the torque exceeds the limit, and usually does not operate, so it is often difficult to pay attention to. So operators should regularly check the travel switch contact on the pressure moment limiter to see if it can emit a sensitive alarm sound. If there is no sound, it indicates that the fault exists and must be repaired before operation

(2) Refuse horizontal pulling and lifting. According to the safety operation regulations of tower cranes, it is strictly prohibited to pull and lift horizontally. However, it is difficult to achieve complete vertical lifting on the construction site. Usually, when calculating the force, the inclination of the sling is considered to be 3° Although the horizontal force is only 5% of the vertical lifting weight, the generated torque has great uncertainty because the arm of the horizontal force is independent and relatively large, and cannot be ignored; The influence of inclination angle. The most terrifying thing is to use a sling to drag a heavy object diagonally, and the operator does not know the resistance coefficient, which poses great danger. Therefore, the tower crane driver must actively refuse to pull and lift the heavy object horizontally

(3) Wind prevention measures should be taken to avoid lifting due to excessive wind force. Wind loads will increase the overturning moment. The regulations prohibit starting the machine when the wind force is above level 6. Tower crane drivers should regularly inspect key windproof parts such as wind speed alarms, rail clamps, and anchoring devices to eliminate hidden dangers and actively refuse illegal operations

(4) In order to expand the working area, intentionally short circuiting the torque limiter is a serious violation of regulations and will threaten the safety of relevant personnel and equipment, and should be resolutely resisted

2. Preventing collisions

(1) The tower crane driver should operate after receiving a command signal from the ground, and should ring the electric bell before operation to remind relevant personnel that the tower crane is about to operate

(2) During operation, focus on observing the operation and position of the hook at any time, and pay attention to whether there are obstacles around. At the end of work, the hook must be raised above the highest obstacle

(3) It is necessary to proficiently grasp the inertia effect of heavy objects, slow down and stop in advance. To be able to apply stable hook technology, it is necessary to learn the mechanical knowledge of the causes of inertial forces, flexibly control the running speed, accurately align, and prevent collisions

(4) When there is a collision object under the tower crane, the hook should be raised in advance to avoid collision, as inertia swing is difficult to control and can easily cause collision. On the contrary, when placing the hook, it should not be too low to prevent the hook from swinging and injuring people

(5) When someone is carrying out maintenance work on the tower crane, it is strictly prohibited to start operation